Radio Resource Management Configuration Guide, Cisco IOS XE

Radio Resource Management Configuration Guide, Cisco IOS XE
Radio Resource Management Configuration Guide, Cisco IOS XE
Release 3SE (Catalyst 3650 Switches)
First Published: June 19, 2013
Last Modified: October 10, 2013
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Text Part Number: OL-29946-01
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CONTENTS
CHAPTER 1
Preface 1
Document Conventions 1
Related Documentation 3
Obtaining Documentation and Submitting a Service Request 3
CHAPTER 2
Using the Command-Line Interface 5
Information About Using the Command-Line Interface 5
Command Modes 5
Using the Help System 7
Understanding Abbreviated Commands 8
No and Default Forms of Commands 8
CLI Error Messages 8
Configuration Logging 9
How to Use the CLI to Configure Features 9
Configuring the Command History 9
Changing the Command History Buffer Size 10
Recalling Commands 10
Disabling the Command History Feature 11
Enabling and Disabling Editing Features 11
Editing Commands Through Keystrokes 12
Editing Command Lines That Wrap 13
Searching and Filtering Output of show and more Commands 14
Accessing the CLI on a Switch Stack 15
Accessing the CLI Through a Console Connection or Through Telnet 15
CHAPTER 3
Using the Web Graphical User Interface 17
Prerequisites for Using the Web GUI 17
Information About Using The Web GUI 17
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Web GUI Features 17
Connecting the Console Port of the Switch 19
Logging On to the Web GUI 19
Enabling Web and Secure Web Modes 19
Configuring the Switch Web GUI 20
CHAPTER 4
Configuring Radio Resource Management 25
Finding Feature Information 25
Prerequisites for Configuring Radio Resource Management 25
Restrictions for Radio Resource Management 26
Information About Radio Resource Management 26
Radio Resource Monitoring 26
Information About RF Groups 27
RF Group Leader 27
RF Group Name 29
Mobility Controller 29
Mobility Agent 30
Information About Rogue Access Point Detection in RF Groups 30
Transmit Power Control 30
Overriding the TPC Algorithm with Minimum and Maximum Transmit Power Settings 31
Dynamic Channel Assignment 31
Coverage Hole Detection and Correction 33
How to Configure RRM 33
Configuring Advanced RRM CCX Parameters (CLI) 33
Configuring Neighbor Discovery Type (CLI) 34
Configuring RRM Profile Thresholds, Monitoring Channels, and Monitoring Intervals
(GUI) 34
Configuring RF Groups 36
Configuring the RF Group Mode (GUI) 36
Configuring RF Group Selection Mode (CLI) 37
Configuring an RF Group Name (CLI) 37
Configuring an RF Group Name (GUI) 38
Configuring Members in a 802.11 Static RF Group (CLI) 38
Configuring Transmit Power Control 39
Configuring the Tx-Power Control Threshold (CLI) 39
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Configuring the Tx-Power Level (CLI) 40
Configuring Transmit Power Control (GUI) 41
Configuring 802.11 RRM Parameters 42
Configuring Advanced 802.11 Channel Assignment Parameters (CLI) 42
Configuring Dynamic Channel Assignment (GUI) 44
Configuring 802.11 Coverage Hole Detection (CLI) 46
Configuring Coverage Hole Detection (GUI) 47
Configuring 802.11 Event Logging (CLI) 49
Configuring 802.11 Statistics Monitoring (CLI) 50
Configuring the 802.11 Performance Profile (CLI) 51
Configuring Rogue Access Point Detection in RF Groups 52
Configuring Rogue Access Point Detection in RF Groups (CLI) 52
Enabling Rogue Access Point Detection in RF Groups (GUI) 54
Monitoring RRM Parameters and RF Group Status 54
Monitoring RRM Parameters 54
Monitoring RF Group Status (CLI) 56
Monitoring RF Group Status (GUI) 56
Examples: RF Group Configuration 57
Additional References for Radio Resource Management 57
Feature History and Information For Performing Radio Resource Management Configuration 58
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CHAPTER
1
Preface
• Document Conventions, page 1
• Related Documentation, page 3
• Obtaining Documentation and Submitting a Service Request, page 3
Document Conventions
This document uses the following conventions:
Convention
Description
^ or Ctrl
Both the ^ symbol and Ctrl represent the Control (Ctrl) key on a keyboard. For
example, the key combination ^D or Ctrl-D means that you hold down the Control
key while you press the D key. (Keys are indicated in capital letters but are not
case sensitive.)
bold font
Commands and keywords and user-entered text appear in bold font.
Italic font
Document titles, new or emphasized terms, and arguments for which you supply
values are in italic font.
Courier
font
Bold Courier
Terminal sessions and information the system displays appear in courier font.
font
Bold Courier
font indicates text that the user must enter.
[x]
Elements in square brackets are optional.
...
An ellipsis (three consecutive nonbolded periods without spaces) after a syntax
element indicates that the element can be repeated.
|
A vertical line, called a pipe, indicates a choice within a set of keywords or
arguments.
[x | y]
Optional alternative keywords are grouped in brackets and separated by vertical
bars.
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Preface
Document Conventions
Convention
Description
{x | y}
Required alternative keywords are grouped in braces and separated by vertical
bars.
[x {y | z}]
Nested set of square brackets or braces indicate optional or required choices
within optional or required elements. Braces and a vertical bar within square
brackets indicate a required choice within an optional element.
string
A nonquoted set of characters. Do not use quotation marks around the string or
the string will include the quotation marks.
<>
Nonprinting characters such as passwords are in angle brackets.
[]
Default responses to system prompts are in square brackets.
!, #
An exclamation point (!) or a pound sign (#) at the beginning of a line of code
indicates a comment line.
Reader Alert Conventions
This document may use the following conventions for reader alerts:
Note
Tip
Caution
Timesaver
Warning
Means reader take note. Notes contain helpful suggestions or references to material not covered in the
manual.
Means the following information will help you solve a problem.
Means reader be careful. In this situation, you might do something that could result in equipment damage
or loss of data.
Means the described action saves time. You can save time by performing the action described in the
paragraph.
Means reader be warned. In this situation, you might perform an action that could result in bodily
injury.
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Preface
Related Documentation
Related Documentation
Note
Before installing or upgrading the switch, refer to the switch release notes.
• Cisco Catalyst 3650 Switch documentation, located at:
http://www.cisco.com/go/cat3650_docs
• Cisco SFP and SFP+ modules documentation, including compatibility matrixes, located at:
http://www.cisco.com/en/US/products/hw/modules/ps5455/tsd_products_support_series_home.html
• Error Message Decoder, located at:
https://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information,
see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco
technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed
and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free
service and Cisco currently supports RSS version 2.0.
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Preface
Obtaining Documentation and Submitting a Service Request
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CHAPTER
2
Using the Command-Line Interface
• Information About Using the Command-Line Interface, page 5
• How to Use the CLI to Configure Features, page 9
Information About Using the Command-Line Interface
Command Modes
The Cisco IOS user interface is divided into many different modes. The commands available to you depend
on which mode you are currently in. Enter a question mark (?) at the system prompt to obtain a list of commands
available for each command mode.
You can start a CLI session through a console connection, through Telnet, a SSH, or by using the browser.
When you start a session, you begin in user mode, often called user EXEC mode. Only a limited subset of
the commands are available in user EXEC mode. For example, most of the user EXEC commands are one-time
commands, such as show commands, which show the current configuration status, and clear commands,
which clear counters or interfaces. The user EXEC commands are not saved when the switch reboots.
To have access to all commands, you must enter privileged EXEC mode. Normally, you must enter a password
to enter privileged EXEC mode. From this mode, you can enter any privileged EXEC command or enter
global configuration mode.
Using the configuration modes (global, interface, and line), you can make changes to the running configuration.
If you save the configuration, these commands are stored and used when the switch reboots. To access the
various configuration modes, you must start at global configuration mode. From global configuration mode,
you can enter interface configuration mode and line configuration mode.
This table describes the main command modes, how to access each one, the prompt you see in that mode, and
how to exit the mode.
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Using the Command-Line Interface
Command Modes
Table 1: Command Mode Summary
Mode
Access Method
User EXEC
Begin a session
using Telnet, SSH,
or console.
Prompt
Exit Method
About This Mode
Switch>
Enter logout or
quit.
Use this mode to
• Change
terminal
settings.
• Perform basic
tests.
• Display
system
information.
Privileged EXEC
While in user EXEC
mode, enter the
enable command.
Global
configuration
While in privileged
EXEC mode, enter
the configure
command.
VLAN
configuration
While in global
configuration mode,
enter the vlan
vlan-id command.
Interface
configuration
While in global
configuration mode,
enter the interface
command (with a
specific interface).
Switch#
Switch(config)#
Switch(config-vlan)#
Switch(config-if)#
Enter disable to
exit.
Use this mode to
verify commands
that you have
entered. Use a
password to protect
access to this mode.
To exit to privileged
EXEC mode, enter
exit or end, or press
Ctrl-Z.
Use this mode to
configure
parameters that
apply to the entire
switch.
To exit to global
configuration mode,
enter the exit
command.
Use this mode to
configure VLAN
parameters. When
VTP mode is
transparent, you can
To return to
create
privileged EXEC
extended-range
mode, press Ctrl-Z
VLANs (VLAN IDs
or enter end.
greater than 1005)
and save
configurations in the
switch startup
configuration file.
To exit to global
Use this mode to
configuration mode, configure
enter exit.
parameters for the
Ethernet ports.
To return to
privileged EXEC
mode, press Ctrl-Z
or enter end.
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Using the Command-Line Interface
Using the Help System
Mode
Access Method
Line configuration
While in global
configuration mode,
specify a line with
the line vty or line
console command.
Prompt
Exit Method
Switch(config-line)#
About This Mode
To exit to global
Use this mode to
configuration mode, configure
enter exit.
parameters for the
terminal line.
To return to
privileged EXEC
mode, press Ctrl-Z
or enter end.
Using the Help System
You can enter a question mark (?) at the system prompt to display a list of commands available for each
command mode. You can also obtain a list of associated keywords and arguments for any command.
SUMMARY STEPS
1. help
2. abbreviated-command-entry ?
3. abbreviated-command-entry <Tab>
4. ?
5. command ?
6. command keyword ?
DETAILED STEPS
Step 1
Command or Action
Purpose
help
Obtains a brief description of the help system in any
command mode.
Example:
Switch# help
Step 2
abbreviated-command-entry ?
Obtains a list of commands that begin with a particular
character string.
Example:
Switch# di?
dir disable disconnect
Step 3
abbreviated-command-entry <Tab>
Completes a partial command name.
Example:
Switch# sh conf<tab>
Switch# show configuration
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Understanding Abbreviated Commands
Step 4
Command or Action
Purpose
?
Lists all commands available for a particular command
mode.
Example:
Switch> ?
Step 5
command ?
Lists the associated keywords for a command.
Example:
Switch> show ?
Step 6
command keyword ?
Lists the associated arguments for a keyword.
Example:
Switch(config)# cdp holdtime ?
<10-255> Length of time (in sec) that receiver
must keep this packet
Understanding Abbreviated Commands
You need to enter only enough characters for the switch to recognize the command as unique.
This example shows how to enter the show configuration privileged EXEC command in an abbreviated form:
Switch# show conf
No and Default Forms of Commands
Almost every configuration command also has a no form. In general, use the no form to disable a feature or
function or reverse the action of a command. For example, the no shutdown interface configuration command
reverses the shutdown of an interface. Use the command without the keyword no to reenable a disabled feature
or to enable a feature that is disabled by default.
Configuration commands can also have a default form. The default form of a command returns the command
setting to its default. Most commands are disabled by default, so the default form is the same as the no form.
However, some commands are enabled by default and have variables set to certain default values. In these
cases, the default command enables the command and sets variables to their default values.
CLI Error Messages
This table lists some error messages that you might encounter while using the CLI to configure your switch.
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Configuration Logging
Table 2: Common CLI Error Messages
Error Message
Meaning
How to Get Help
% Ambiguous command: "show
con"
You did not enter enough
characters for your switch to
recognize the command.
Reenter the command followed by
a question mark (?) without any
space between the command and
the question mark.
The possible keywords that you can
enter with the command appear.
% Incomplete command.
You did not enter all of the
Reenter the command followed by
keywords or values required by this a question mark (?) with a space
command.
between the command and the
question mark.
The possible keywords that you can
enter with the command appear.
% Invalid input detected at
‘^’ marker.
You entered the command
Enter a question mark (?) to display
incorrectly. The caret (^) marks the all of the commands that are
point of the error.
available in this command mode.
The possible keywords that you can
enter with the command appear.
Configuration Logging
You can log and view changes to the switch configuration. You can use the Configuration Change Logging
and Notification feature to track changes on a per-session and per-user basis. The logger tracks each
configuration command that is applied, the user who entered the command, the time that the command was
entered, and the parser return code for the command. This feature includes a mechanism for asynchronous
notification to registered applications whenever the configuration changes. You can choose to have the
notifications sent to the syslog.
Note
Only CLI or HTTP changes are logged.
How to Use the CLI to Configure Features
Configuring the Command History
The software provides a history or record of commands that you have entered. The command history feature
is particularly useful for recalling long or complex commands or entries, including access lists. You can
customize this feature to suit your needs.
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Configuring the Command History
Changing the Command History Buffer Size
By default, the switch records ten command lines in its history buffer. You can alter this number for a current
terminal session or for all sessions on a particular line. This procedure is optional.
SUMMARY STEPS
1. terminal history [size number-of-lines]
DETAILED STEPS
Step 1
Command or Action
Purpose
terminal history [size number-of-lines]
Changes the number of command lines that the switch records during
the current terminal session in privileged EXEC mode. You can
configure the size from 0 to 256.
Example:
Switch# terminal history size 200
Recalling Commands
To recall commands from the history buffer, perform one of the actions listed in this table. These actions are
optional.
Note
The arrow keys function only on ANSI-compatible terminals such as VT100s.
SUMMARY STEPS
1. Ctrl-P or use the up arrow key
2. Ctrl-N or use the down arrow key
3. show history
DETAILED STEPS
Command or Action
Purpose
Step 1
Ctrl-P or use the up arrow key
Recalls commands in the history buffer, beginning with the most recent command.
Repeat the key sequence to recall successively older commands.
Step 2
Ctrl-N or use the down arrow key Returns to more recent commands in the history buffer after recalling commands
with Ctrl-P or the up arrow key. Repeat the key sequence to recall successively
more recent commands.
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Using the Command-Line Interface
Enabling and Disabling Editing Features
Step 3
Command or Action
Purpose
show history
Lists the last several commands that you just entered in privileged EXEC mode.
The number of commands that appear is controlled by the setting of the terminal
history global configuration command and the history line configuration
command.
Example:
Switch# show history
Disabling the Command History Feature
The command history feature is automatically enabled. You can disable it for the current terminal session or
for the command line. This procedure is optional.
SUMMARY STEPS
1. terminal no history
DETAILED STEPS
Step 1
Command or Action
Purpose
terminal no history
Disables the feature during the current terminal session in
privileged EXEC mode.
Example:
Switch# terminal no history
Enabling and Disabling Editing Features
Although enhanced editing mode is automatically enabled, you can disable it and reenable it.
SUMMARY STEPS
1. terminal editing
2. terminal no editing
DETAILED STEPS
Step 1
Command or Action
Purpose
terminal editing
Reenables the enhanced editing mode for the current terminal
session in privileged EXEC mode.
Example:
Switch# terminal editing
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Enabling and Disabling Editing Features
Step 2
Command or Action
Purpose
terminal no editing
Disables the enhanced editing mode for the current terminal
session in privileged EXEC mode.
Example:
Switch# terminal no editing
Editing Commands Through Keystrokes
The keystrokes help you to edit the command lines. These keystrokes are optional.
Note
The arrow keys function only on ANSI-compatible terminals such as VT100s.
Table 3: Editing Commands
Editing Commands
Description
Ctrl-B or use the left arrow key
Moves the cursor back one character.
Ctrl-F or use the right arrow key
Moves the cursor forward one character.
Ctrl-A
Moves the cursor to the beginning of the command
line.
Ctrl-E
Moves the cursor to the end of the command line.
Esc B
Moves the cursor back one word.
Esc F
Moves the cursor forward one word.
Ctrl-T
Transposes the character to the left of the cursor with
the character located at the cursor.
Delete or Backspace key
Erases the character to the left of the cursor.
Ctrl-D
Deletes the character at the cursor.
Ctrl-K
Deletes all characters from the cursor to the end of
the command line.
Ctrl-U or Ctrl-X
Deletes all characters from the cursor to the beginning
of the command line.
Ctrl-W
Deletes the word to the left of the cursor.
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Enabling and Disabling Editing Features
Esc D
Deletes from the cursor to the end of the word.
Esc C
Capitalizes at the cursor.
Esc L
Changes the word at the cursor to lowercase.
Esc U
Capitalizes letters from the cursor to the end of the
word.
Ctrl-V or Esc Q
Designates a particular keystroke as an executable
command, perhaps as a shortcut.
Return key
Scrolls down a line or screen on displays that are
longer than the terminal screen can display.
Note
The More prompt is used for any output that
has more lines than can be displayed on the
terminal screen, including show command
output. You can use the Return and Space
bar keystrokes whenever you see the More
prompt.
Space bar
Scrolls down one screen.
Ctrl-L or Ctrl-R
Redisplays the current command line if the switch
suddenly sends a message to your screen.
Editing Command Lines That Wrap
You can use a wraparound feature for commands that extend beyond a single line on the screen. When the
cursor reaches the right margin, the command line shifts ten spaces to the left. You cannot see the first ten
characters of the line, but you can scroll back and check the syntax at the beginning of the command. The
keystroke actions are optional.
To scroll back to the beginning of the command entry, press Ctrl-B or the left arrow key repeatedly. You can
also press Ctrl-A to immediately move to the beginning of the line.
Note
The arrow keys function only on ANSI-compatible terminals such as VT100s.
The following example shows how to wrap a command line that extends beyond a single line on the screen.
SUMMARY STEPS
1. access-list
2. Ctrl-A
3. Return key
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Searching and Filtering Output of show and more Commands
DETAILED STEPS
Step 1
Command or Action
Purpose
access-list
Displays the global configuration command entry that extends beyond
one line.
Example:
When the cursor first reaches the end of the line, the line is shifted ten
spaces to the left and redisplayed. The dollar sign ($) shows that the
line has been scrolled to the left. Each time the cursor reaches the end
of the line, the line is again shifted ten spaces to the left.
Switch(config)# access-list 101 permit tcp
10.15.22.25 255.255.255.0 10.15.22.35
Switch(config)# $ 101 permit tcp
10.15.22.25 255.255.255.0 10.15.22.35
255.25
Switch(config)# $t tcp 10.15.22.25
255.255.255.0 131.108.1.20 255.255.255.0
eq
Switch(config)# $15.22.25 255.255.255.0
10.15.22.35 255.255.255.0 eq 45
Step 2
Ctrl-A
Checks the complete syntax.
Example:
The dollar sign ($) appears at the end of the line to show that the line
has been scrolled to the right.
Switch(config)# access-list 101 permit tcp
10.15.22.25 255.255.255.0 10.15.2$
Step 3
Return key
Execute the commands.
The software assumes that you have a terminal screen that is 80 columns
wide. If you have a different width, use the terminal width privileged
EXEC command to set the width of your terminal.
Use line wrapping with the command history feature to recall and
modify previous complex command entries.
Searching and Filtering Output of show and more Commands
You can search and filter the output for show and more commands. This is useful when you need to sort
through large amounts of output or if you want to exclude output that you do not need to see. Using these
commands is optional.
SUMMARY STEPS
1. {show | more} command | {begin | include | exclude} regular-expression
DETAILED STEPS
Step 1
Command or Action
Purpose
{show | more} command | {begin | include | exclude}
regular-expression
Searches and filters the output.
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Accessing the CLI on a Switch Stack
Command or Action
Purpose
Example:
Expressions are case sensitive. For example, if you enter
| exclude output, the lines that contain output are not
displayed, but the lines that contain output appear.
Switch# show interfaces | include protocol
Vlan1 is up, line protocol is up
Vlan10 is up, line protocol is down
GigabitEthernet1/0/1 is up, line protocol is down
GigabitEthernet1/0/2 is up, line protocol is up
Accessing the CLI on a Switch Stack
You can access the CLI through a console connection, through Telnet, a SSH, or by using the browser.
You manage the switch stack and the stack member interfaces through the active switch. You cannot manage
stack members on an individual switch basis. You can connect to the active switch through the console port
or the Ethernet management port of one or more stack members. Be careful with using multiple CLI sessions
on the active switch. Commands that you enter in one session are not displayed in the other sessions. Therefore,
it is possible to lose track of the session from which you entered commands.
Note
We recommend using one CLI session when managing the switch stack.
If you want to configure a specific stack member port, you must include the stack member number in the CLI
command interface notation.
To debug the standby switch, use the session standby ios privileged EXEC command from the active switch
to access the IOS console of the standby switch. To debug a specific stack member, use the session switch
stack-member-number privileged EXEC command from the active switch to access the diagnostic shell of
the stack member. For more information about these commands, see the switch command reference.
Accessing the CLI Through a Console Connection or Through Telnet
Before you can access the CLI, you must connect a terminal or a PC to the switch console or connect a PC to
the Ethernet management port and then power on the switch, as described in the hardware installation guide
that shipped with your switch.
If your switch is already configured, you can access the CLI through a local console connection or through a
remote Telnet session, but your switch must first be configured for this type of access.
You can use one of these methods to establish a connection with the switch:
• Connect the switch console port to a management station or dial-up modem, or connect the Ethernet
management port to a PC. For information about connecting to the console or Ethernet management
port, see the switch hardware installation guide.
• Use any Telnet TCP/IP or encrypted Secure Shell (SSH) package from a remote management station.
The switch must have network connectivity with the Telnet or SSH client, and the switch must have an
enable secret password configured.
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Using the Command-Line Interface
Accessing the CLI Through a Console Connection or Through Telnet
• The switch supports up to 16 simultaneous Telnet sessions. Changes made by one Telnet user are
reflected in all other Telnet sessions.
• The switch supports up to five simultaneous secure SSH sessions.
After you connect through the console port, through the Ethernet management port, through a Telnet
session or through an SSH session, the user EXEC prompt appears on the management station.
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CHAPTER
3
Using the Web Graphical User Interface
• Prerequisites for Using the Web GUI, page 17
• Information About Using The Web GUI, page 17
• Connecting the Console Port of the Switch , page 19
• Logging On to the Web GUI, page 19
• Enabling Web and Secure Web Modes , page 19
• Configuring the Switch Web GUI, page 20
Prerequisites for Using the Web GUI
• The GUI must be used on a PC running Windows 7, Windows XP SP1 (or later releases), or Windows
2000 SP4 (or later releases).
• The switch GUI is compatible with Microsoft Internet Explorer version 10.x, Mozilla Firefox 20.x, or
Google Chrome 26.x.
Information About Using The Web GUI
A web browser, or graphical user interface (GUI), is built into each switch.
You can use either the service port interface or the management interface to access the GUI. We recommend
that you use the service-port interface. Click Help at the top of any page in the GUI to display online help.
You might need to disable your browser’s pop-up blocker to view the online help.
Web GUI Features
The switch web GUI supports the following:
The Configuration Wizard—After initial configuration of the IP address and the local username/password or
auth via the authentication server (privilege 15 needed), the wizard provides a method to complete the initial
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Web GUI Features
wireless configuration. Start the wizard through Configuration -> Wizard and follow the nine-step process to
configure the following:
• Admin Users
• SNMP System Summary
• Management Port
• Wireless Management
• RF Mobility and Country code
• Mobility configuration
• WLANs
• 802.11 Configuration
• Set Time
The Monitor tab:
• Displays summary details of switch, clients, and access points.
• Displays all radio and AP join statistics.
• Displays air quality on access points.
• Displays list of all Cisco Discovery Protocol (CDP) neighbors on all interfaces and the CDP traffic
information.
• Displays all rogue access points based on their classification-friendly, malicious, ad hoc, classified, and
unclassified.
The Configuration tab:
• Enables you to configure the switch for all initial operation using the web Configuration Wizard. The
wizard allows you to configure user details, management interface, and so on.
• Enables you to configure the system, internal DHCP server, management, and mobility management
parameters.
• Enables you to configure the switch, WLAN, and radios.
• Enables you to configure and set security policies on your switch.
• Enables you to access the switch operating system software management commands.
The Administration tab enables you to configure system logs.
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Connecting the Console Port of the Switch
Connecting the Console Port of the Switch
Before You Begin
Before you can configure the switch for basic operations, you need to connect it to a PC that uses a VT-100
terminal emulation program (such as HyperTerminal, ProComm, Minicom, or Tip).
Step 1
Step 2
Step 3
Connect one end of a null-modem serial cable to the switch's RJ-45 console port and the other end to your PC's serial
port.
Plug the AC power cord into the switch and a grounded 100 to 240 VAC, 50/60-Hz electrical outlet. Turn on the power
supply. The bootup script displays operating system software initialization (code download and power-on self-test
verification) and basic configuration. If the switch passes the power-on self-test, the bootup script runs the configuration
wizard, which prompts you for basic configuration input.
Enter yes. Proceed with basic initial setup configuration parameters in the CLI setup wizard. Specify the IP address for
the service port which is the gigabitethernet 0/0 interface.
After entering the configuration parameters in the configuration wizard, you can access the Web GUI. Now, the switch
is configured with the IP address for service port.
Logging On to the Web GUI
Step 1
Enter the switch IP address in your browser’s address line. For a secure connection, enter https://ip-address. For a less
secure connection, enter http://ip-address.
Step 2
The Accessing Cisco AIR-CT3650 page appears.
Enabling Web and Secure Web Modes
Step 1
Choose Configuration > Switch > Management > Protocol Management > HTTP-HTTPS.
The HTTP-HTTPS Configuration page appears.
Step 2
To enable web mode, which allows users to access the switch GUI using “http://ip-address,” choose Enabled from the
HTTP Access drop-down list. Otherwise, choose Disabled. Web mode (HTTP) is not a secure connection.
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Configuring the Switch Web GUI
Step 3
Step 4
Step 5
Step 6
Step 7
To enable secure web mode, which allows users to access the switch GUI using “https://ip-address,” choose Enabled
from the HTTPS Access drop-down list. Otherwise, choose Disabled. Secure web mode (HTTPS) is a secure connection.
Choose to track the device in the IP Device Tracking check box.
Choose to enable the trust point in the Enable check box.
Choose the trustpoints from the Trustpoints drop-down list.
Enter the amount of time, in seconds, before the web session times out due to inactivity in the HTTP Timeout-policy (1
to 600 sec) text box.
The valid range is from 1 to 600 seconds.
Step 8
Enter the server life time in the Server Life Time (1 to 86400 sec) text box.
The valid range is from1 to 86400 seconds.
Step 9
Enter the maximum number of connection requests that the server can accept in the Maximum number of Requests (1
to 86400) text box.
The valid range is from 1 to 86400 connections.
Step 10
Step 11
Click Apply.
Click Save Configuration.
Configuring the Switch Web GUI
The configuration wizard enables you to configure basic settings on the switch. You can run the wizard after
you receive the switch from the factory or after the switch has been reset to factory defaults. The configuration
wizard is available in both GUI and CLI formats.
Step 1
Connect your PC to the service port and configure an IPv4 address to use the same subnet as the switch. The switch is
loaded with IOS XE image and the service port interface is configured as gigabitethernet 0/0.
Step 2
Start Internet Explorer 10 (or later), Firefox 2.0.0.11 (or later), or Google Chrome on your PC and enter the management
interface IP address on the browser window. The management interface IP address is same as the gigabitethernet 0/0
(also known as service port interface). When you log in for the first time, you need to enter HTTP username and password.
By default, the username is admin and the password is cisco.
You can use both HTTP and HTTPS when using the service port interface. HTTPS is enabled by default and HTTP can
also be enabled.
When you log in for the first time, the Accessing Cisco Switch <Model Number> <Hostname> page appears.
Step 3
Step 4
On the Accessing Cisco Switch page, click the Wireless Web GUI link to access switch web GUI Home page.
Choose Configuration > Wizard to perform all steps that you need to configure the switch initially.
The Admin Users page appears.
Step 5
On the Admin Users page, enter the administrative username to be assigned to this switch in the User Name text box
and the administrative password to be assigned to this switch in the Password and Confirm Password text boxes. Click
Next.
The default username is admin and the default password is cisco. You can also create a new administrator user for the
switch. You can enter up to 24 ASCII characters for username and password.
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Configuring the Switch Web GUI
The SNMP System Summary page appears.
Step 6
On the SNMP System Summary page, enter the following SNMP system parameters for the switch, and click Next:
• Customer-definable switch location in the Location text box.
• Customer-definable contact details such as phone number with names in the Contact text box.
• Choose enabled to send SNMP notifications for various SNMP traps or disabled not to send SNMP notifications
for various SNMP traps from the SNMP Global Trap drop-down list.
• Choose enabled to send system log messages or disabled not to send system log messages from the SNMP Logging
drop-down list.
The SNMP trap server, must be reachable through the distribution ports (and not through the gigabitethernet0/0
service or management interface).
The Management Port page appears.
Note
Step 7
In the Management Port page, enter the following parameters for the management port interface (gigabitethernet 0/0)
and click Next.
• Interface IP address that you assigned for the service port in the IP Address text box.
• Network mask address of the management port interface in the Netmask text box.
• The IPv4 Dynamic Host Configuration Protocol (DHCP) address for the selected port in the IPv4 DHCP Server
text box.
The Wireless Management page appears.
Step 8
In the Wireless Management page, enter the following wireless interface management details, and click Next.
• Choose the interface—VLAN, or Ten Gigabit Ethernet from the Select Interface drop-down list.
• VLAN tag identifier, or 0 for no VLAN tag in the VLAN id text box.
• IP address of wireless management interface where access points are connected in the IP Address text box.
• Network mask address of the wireless management interface in the Netmask text box.
• DHCP IPv4 IP address in the IPv4 DHCP Server text box.
When selecting VLAN as interface, you can specify the ports as –Trunk or Access ports from the selected list displayed
in the Switch Port Configuration text box.
The RF Mobility and Country Code page appears.
Step 9
In the RF Mobility and Country Code page, enter the RF mobility domain name in the RF Mobility text box, choose
current country code from the Country Code drop-down list, and click Next. From the GUI, you can select only one
country code.
Note
Before configuring RF grouping parameters and mobility configuration, ensure that you refer to the relevant
conceptual content and then proceed with the configuration.
The Mobility Configuration page with mobility global configuration settings appears.
Step 10
In the Mobility Configuration page, view and enter the following mobility global configuration settings, and click Next.
• Choose Mobility Controller or Mobility Agent from the Mobility Role drop-down list:
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Configuring the Switch Web GUI
• If Mobility Agent is chosen, enter the mobility controller IP address in the Mobility Controller IP Address
text box and mobility controller IP address in the Mobility Controller Public IP Address text box.
• If Mobility Controller is chosen, then the mobility controller IP address and mobility controller public IP
address are displayed in the respective text boxes.
• Displays mobility protocol port number in the Mobility Protocol Port text box.
• Displays the mobility switch peer group name in the Mobility Switch Peer Group Name text box.
• Displays whether DTLS is enabled in the DTLS Mode text box.
DTLS is a standards-track Internet Engineering Task Force (IETF) protocol based on TLS.
• Displays mobility domain identifier for 802.11 radios in the Mobility Domain ID for 802.11 radios text box.
• The amount of time (in seconds) between each ping request sent to an peer switch in the Mobility Keepalive Interval
(1-30)sec text box.
Valid range is from 1 to 30 seconds, and the default value is 10 seconds.
• Number of times a ping request is sent to an peer switch before the peer is considered to be unreachable in the
Mobility Keepalive Count (3-20) text box.
The valid range is from 3 to 20, and the default value is 3.
• The DSCP value that you can set for the mobility switch in the Mobility Control Message DSCP Value (0-63) text
box.
The valid range is 0 to 63, and the default value is 0.
• Displays the number of mobility switch peer group member configured in the Switch Peer Group Members
Configured text box.
The WLANs page appears.
Step 11
In the WLANs page, enter the following WLAN configuration parameters, and click Next.
• WLAN identifier in the WLAN ID text box.
• SSID of the WLAN that the client is associated with in the SSID text box.
• Name of the WLAN used by the client in the Profile Name text box.
The 802.11 Configuration page appears.
Step 12
In the 802.11 Configuration page, check either one or both 802.11a/n/ac and 802.11b/g/n check boxes to enable the
802.11 radios, and click Next.
The Set Time page appears.
Step 13
In the Set Time page, you can configure the time and date on the switch based on the following parameters, and click
Next.
• Displays current timestamp on the switch in the Current Time text box.
• Choose either Manual or NTP from the Mode drop-down list.
On using the NTP server, all access points connected to the switch, synchronizes its time based on the NTP server
settings available.
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Configuring the Switch Web GUI
• Choose date on the switch from the Year, Month, and Day drop-down list.
• Choose time from the Hours, Minutes, and Seconds drop-down list.
• Enter the time zone in the Zone text box and select the off setting required when compared to the current time
configured on the switch from the Offset drop-down list.
The Save Wizard page appears.
Step 14
In the Save Wizard page, you can review the configuration settings performed on the switch using these steps, and if
you wish to change any configuration value, click Previous and navigate to that page.
You can save the switch configuration created using the wizard only if a success message is displayed for all the wizards.
If the Save Wizard page displays errors, you must recreate the wizard for initial configuration of the switch.
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Configuring the Switch Web GUI
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4
Configuring Radio Resource Management
• Finding Feature Information, page 25
• Prerequisites for Configuring Radio Resource Management, page 25
• Restrictions for Radio Resource Management, page 26
• Information About Radio Resource Management, page 26
• How to Configure RRM, page 33
• Monitoring RRM Parameters and RF Group Status, page 54
• Examples: RF Group Configuration, page 57
• Additional References for Radio Resource Management, page 57
• Feature History and Information For Performing Radio Resource Management Configuration, page
58
Finding Feature Information
Your software release may not support all of the features documented in this module. For the latest feature
information and caveats, see the release notes for your platform and software release.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
Prerequisites for Configuring Radio Resource Management
The switch should be configured as a mobility controller and not a mobility anchor to configure Radio Resource
Management. It may require dynamic channel assignment functionality for the home APs to be supported.
The new mobility architecture that involves mobility controller and mobility agent must be configured on the
switch or controllers for RRM to work.
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Restrictions for Radio Resource Management
Note
Refer Mobility Configuration Guide for configuring mobility controller and mobility agent.
Restrictions for Radio Resource Management
If an AP tries to join the RF-group that already holds the maximum number of APs it can support, the device
rejects the application and throws an error.
Information About Radio Resource Management
The Radio Resource Management (RRM) software embedded in the switch acts as a built-in RF engineer to
consistently provide real-time RF management of your wireless network. RRM enables switches to continually
monitor their associated lightweight access points for the following information:
• Traffic load—The total bandwidth used for transmitting and receiving traffic. It enables wireless LAN
managers to track and plan network growth ahead of client demand.
• Interference—The amount of traffic coming from other 802.11 sources.
• Noise—The amount of non-802.11 traffic that is interfering with the currently assigned channel.
• Coverage—The Received Signal Strength (RSSI) and signal-to-noise ratio (SNR) for all connected
clients.
• Other —The number of nearby access points.
RRM performs these functions:
• Radio resource monitoring
• Transmit power control
• Dynamic channel assignment
• Coverage hole detection and correction
• RF grouping
Radio Resource Monitoring
RRM automatically detects and configures new switches and lightweight access points as they are added to
the network. It then automatically adjusts associated and nearby lightweight access points to optimize coverage
and capacity.
Lightweight access points can scan all valid channels for the country of operation as well as for channels
available in other locations. The access points in local mode go “off-channel” for a period not greater than 60
ms to monitor these channels for noise and interference. Packets collected during this time are analyzed to
detect rogue access points, rogue clients, ad-hoc clients, and interfering access points.
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Information About RF Groups
Note
In the presence of voice traffic or other critical traffic (in the last 100 ms), the access points can defer
off-channel measurements. It also defers based on WLAN scan defer priority configurations.
Each access point spends only 0.2 percent of its time off-channel. This activity is distributed across all access
points so that adjacent access points are not scanning at the same time, which could adversely affect wireless
LAN performance.
RRM supports new mobility architecture for RF grouping that involves Mobility Controller (MC) and Mobility
Agent (MA).
• Mobility Controller (MC)—The Cisco WLC 5700 Series Controllers, Cisco Catalyst 3850 Switch, or
Cisco Unified Wireless Networking Solution controller can act as MC. The MC has MC functionality
and MA functionality that is running internally into it.
• Mobility Agent (MA)—The Mobility Agent is the component that maintains client mobility state machine
for a mobile client.
Information About RF Groups
An RF group is a logical collection of Cisco WLCs that coordinate to perform RRM in a globally optimized
manner to perform network calculations on a per-radio basis. An RF group exists for each 802.11 network
type. Clustering Cisco WLCs into a single RF group enable the RRM algorithms to scale beyond the capabilities
of a single Cisco WLC.
RF group is created based on following parameters:
• User-configured RF network name.
• Neighbor discovery performed at the radio level.
• Country list configured on MC.
RF grouping runs between MCs.
Lightweight access points periodically send out neighbor messages over the air. Access points using the the
same RF group name validate messages from each other.
When access points on different Cisco WLCs hear validated neighbor messages at a signal strength of –80
dBm or stronger, the Cisco WLCs dynamically form an RF neighborhood in auto mode. In static mode, the
leader is manually selected and the members are added to the RF Group. To know more about RF Group
modes, RF Group Leader.
Note
RF groups and mobility groups are similar in that they both define clusters of Cisco WLCs, but they are
different in terms of their use. An RF group facilitates scalable, system-wide dynamic RF management
while a mobility group facilitates scalable, system-wide mobility and Cisco WLC redundancy.
RF Group Leader
Starting in the 7.0.116.0 release, the RF Group Leader can be configured in two ways as follows:
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Information About RF Groups
• Auto Mode—In this mode, the members of an RF group elect an RF group leader to maintain a “master”
power and channel scheme for the group. The RF grouping algorithm dynamically chooses the RF group
leader and ensures that an RF group leader is always present. Group leader assignments can and do
change (for instance, if the current RF group leader becomes inoperable or if RF group members
experience major changes).
• Static Mode—In this mode, the user selects a Cisco WLC as an RF group leader manually. In this mode,
the leader and the members are manually configured and are therefore fixed. If the members are unable
to join the RF group, the reason is indicated. The leader tries to establish a connection with a member
every 1 minute if the member has not joined in the previous attempt.
The RF group leader analyzes real-time radio data collected by the system, calculates the power and channel
assignments, and sends them to each of the Cisco WLCs in the RF group. The RRM algorithms ensure
system-wide stability and restrain channel and power scheme changes to the appropriate local RF
neighborhoods.
In Cisco WLC software releases prior to 6.0, the dynamic channel assignment (DCA) search algorithm attempts
to find a good channel plan for the radios associated to Cisco WLCs in the RF group, but it does not adopt a
new channel plan unless it is considerably better than the current plan. The channel metric of the worst radio
in both plans determines which plan is adopted. Using the worst-performing radio as the single criterion for
adopting a new channel plan can result in pinning or cascading problems.
Pinning occurs when the algorithm could find a better channel plan for some of the radios in an RF group but
is prevented from pursuing such a channel plan change because the worst radio in the network does not have
any better channel options. The worst radio in the RF group could potentially prevent other radios in the group
from seeking better channel plans. The larger the network, the more likely pinning becomes.
Cascading occurs when one radio’s channel change results in successive channel changes to optimize the
remaining radios in the RF neighborhood. Optimizing these radios could lead to their neighbors and their
neighbors’ neighbors having a suboptimal channel plan and triggering their channel optimization. This effect
could propagate across multiple floors or even multiple buildings, if all the access point radios belong to the
same RF group. This change results in considerable client confusion and network instability.
The main cause of both pinning and cascading is the way in which the search for a new channel plan is
performed and that any potential channel plan changes are controlled by the RF circumstances of a single
radio. In Cisco WLC software release 6.0, the DCA algorithm has been redesigned to prevent both pinning
and cascading. The following changes have been implemented:
• Multiple local searches—The DCA search algorithm performs multiple local searches initiated by
different radios within the same DCA run rather than performing a single global search driven by a
single radio. This change addresses both pinning and cascading while maintaining the desired flexibility
and adaptability of DCA and without jeopardizing stability.
• Multiple channel plan change initiators (CPCIs)—Previously, the single worst radio was the sole initiator
of a channel plan change. Now each radio within the RF group is evaluated and prioritized as a potential
initiator. Intelligent randomization of the resulting list ensures that every radio is eventually evaluated,
which eliminates the potential for pinning.
• Limiting the propagation of channel plan changes (Localization)—For each CPCI radio, the DCA
algorithm performs a local search for a better channel plan, but only the CPCI radio itself and its one-hop
neighboring access points are actually allowed to change their current transmit channels. The impact of
an access point triggering a channel plan change is felt only to within two RF hops from that access
point, and the actual channel plan changes are confined to within a one-hop RF neighborhood. Because
this limitation applies across all CPCI radios, cascading cannot occur.
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Information About RF Groups
• Non-RSSI-based cumulative cost metric—A cumulative cost metric measures how well an entire region,
neighborhood, or network performs with respect to a given channel plan. The individual cost metrics of
all access points in that area are considered in order to provide an overall understanding of the channel
plan’s quality. These metrics ensure that the improvement or deterioration of each single radio is factored
into any channel plan change. The objective is to prevent channel plan changes in which a single radio
improves but at the expense of multiple other radios experiencing a considerable performance decline.
The RRM algorithms run at a specified updated interval, which is 600 seconds by default. Between update
intervals, the RF group leader sends keepalive messages to each of the RF group members and collects real-time
RF data.
Note
Several monitoring intervals are also available. See the Configuring RRM section for details.
RF Group Name
A Cisco WLC is configured with an RF group name, which is sent to all access points joined to the Cisco
WLC and used by the access points as the shared secret for generating the hashed MIC in the neighbor
messages. To create an RF group, you configure all of the Cisco WLCs to be included in the group with the
same RF group name.
If there is any possibility that an access point joined to a Cisco WLC may hear RF transmissions from an
access point on a different Cisco WLC, you should configure the Cisco WLCs with the same RF group name.
If RF transmissions between access points can be heard, then system-wide RRM is recommended to avoid
802.11 interference and contention as much as possible.
Mobility Controller
An MC can either be a group leader or a group member. One of the MCs can act as a RF group leader based
on RF grouping and RF group election with other MCs. The order of priority to elect the RF leader is based
on the maximum number of APs the controller or switch can support. The highest priority being 1 and the
least being 5.
1 WiSM 2 Controllers
2 Cisco WLC 5700 Series Controllers
3 WiSM 1 Controllers
4 Catalyst 3850 Series Switches
5 Catalyst 3650 Series Switches
When one of the MCs becomes the RRM group leader, the remaining MCs become RRM group members.
RRM group members send their RF information to the Group Leader. The group leader determines a channel
and Tx power plan for the network and passes the information back to the RF group members. The MCs push
the power plan to MA for the radios that belong to MA. These channel and power plans are ultimately pushed
down to individual radios.
Note
MC has MA functionality within it.
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Transmit Power Control
Mobility Agent
The MA communicates with the MC. The MC includes MAC or IP address of the switch/controller while
communicating with the MA.
The MA provides the following information when polled by the MC:
• Interference or noise data.
• Neighbor data.
• Radio capabilities (supported channels, power levels).
• Radio configuration (power, channel, channel width).
• Radar data.
The MC exchanges the following information with the switch/controller (MA). The message includes:
• Configurations (channel/power/channel width) for individual radios.
• Polling requests for current configurations and RF measurements for individual radios
• Group Leader Update
In turn, the MA communicates the following messages with the MC:
• RF measurements from radios (e.g. load, noise and neighbor information)
• RF capabilities and configurations of individual radios
The MA sets channel, power, and channel width on the radios when directed by the MC. The DFS, coverage
hole detection/mitigation, static channel/power configurations are performed by the MA.
Information About Rogue Access Point Detection in RF Groups
After you have created an RF group of Cisco WLCs, you need to configure the access points connected to
the Cisco WLCs to detect rogue access points. The access points will then select the beacon/probe-response
frames in neighboring access point messages to see if they contain an authentication information element (IE)
that matches that of the RF group. If the select is successful, the frames are authenticated. Otherwise, the
authorized access point reports the neighboring access point as a rogue, records its BSSID in a rogue table,
and sends the table to the Cisco WLC.
Transmit Power Control
The switch dynamically controls access point transmit power based on real-time wireless LAN conditions.
The Transmit Power Control (TPC) algorithm both increases and decreases an access point’s power in response
to changes in the RF environment. In most instances, TPC seeks to lower an access point's power to reduce
interference, but in the case of a sudden change in the RF coverage—for example, if an access point fails or
becomes disabled—TPC can also increase power on surrounding access points. This feature is different from
coverage hole detection, which is primarily concerned with clients. TPC provides enough RF power to achieve
desired coverage levels while avoiding channel interference between access points.
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Overriding the TPC Algorithm with Minimum and Maximum Transmit Power Settings
Overriding the TPC Algorithm with Minimum and Maximum Transmit Power
Settings
The TPC algorithm balances RF power in many diverse RF environments. However, it is possible that automatic
power control will not be able to resolve some scenarios in which an adequate RF design was not possible to
implement due to architectural restrictions or site restrictions—for example, when all access points must be
mounted in a central hallway, placing the access points close together, but requiring coverage out to the edge
of the building.
In these scenarios, you can configure maximum and minimum transmit power limits to override TPC
recommendations. The maximum and minimum TPC power settings apply to all access points through RF
profiles in a RF network.
To set the Maximum Power Level Assignment and Minimum Power Level Assignment, enter the maximum
and minimum transmit power used by RRM in the text boxes in the Tx Power Control page. The range for
these parameters is -10 to 30 dBm. The minimum value cannot be greater than the maximum value; the
maximum value cannot be less than the minimum value.
If you configure a maximum transmit power, RRM does not allow any access point attached to the switch to
exceed this transmit power level (whether the power is set by RRM TPC or by coverage hole detection). For
example, if you configure a maximum transmit power of 11 dBm, then no access point would transmit above
11 dBm, unless the access point is configured manually.
Dynamic Channel Assignment
Two adjacent access points on the same channel can cause either signal contention or signal collision. In a
collision, data is not received by the access point. This functionality can become a problem, for example,
when someone reading e-mail in a café affects the performance of the access point in a neighboring business.
Even though these are completely separate networks, someone sending traffic to the café on channel 1 can
disrupt communication in an enterprise using the same channel. Switches can dynamically allocate access
point channel assignments to avoid conflict and to increase capacity and performance. Channels are “reused”
to avoid wasting scarce RF resources. In other words, channel 1 is allocated to a different access point far
from the café, which is more effective than not using channel 1 altogether.
The switch’s Dynamic Channel Assignment (DCA) capabilities are also useful in minimizing adjacent channel
interference between access points. For example, two overlapping channels in the 802.11b/g band, such as 1
and 2, cannot both simultaneously use 11/54 Mbps. By effectively reassigning channels, the switch keeps
adjacent channels separated.
Note
We recommend that you use only non-overlapping channels (1, 6, 11, and so on).
The switch examines a variety of real-time RF characteristics to efficiently handle channel assignments as
follows:
• Access point received energy—The received signal strength measured between each access point and
its nearby neighboring access points. Channels are optimized for the highest network capacity.
• Noise—Noise can limit signal quality at the client and access point. An increase in noise reduces the
effective cell size and degrades user experience. By optimizing channels to avoid noise sources, the
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Configuring Radio Resource Management
Dynamic Channel Assignment
switch can optimize coverage while maintaining system capacity. If a channel is unusable due to excessive
noise, that channel can be avoided.
• 802.11 Interference—Interference is any 802.11 traffic that is not part of your wireless LAN, including
rogue access points and neighboring wireless networks. Lightweight access points constantly scan all
channels looking for sources of interference. If the amount of 802.11 interference exceeds a predefined
configurable threshold (the default is 10 percent), the access point sends an alert to the switch. Using
the RRM algorithms, the switch may then dynamically rearrange channel assignments to increase system
performance in the presence of the interference. Such an adjustment could result in adjacent lightweight
access points being on the same channel, but this setup is preferable to having the access points remain
on a channel that is unusable due to an interfering foreign access point.
In addition, if other wireless networks are present, the switch shifts the usage of channels to complement
the other networks. For example, if one network is on channel 6, an adjacent wireless LAN is assigned
to channel 1 or 11. This arrangement increases the capacity of the network by limiting the sharing of
frequencies. If a channel has virtually no capacity remaining, the switch may choose to avoid this channel.
In very dense deployments in which all nonoverlapping channels are occupied, the switch does its best,
but you must consider RF density when setting expectations.
• Load and utilization—When utilization monitoring is enabled, capacity calculations can consider that
some access points are deployed in ways that carry more traffic than other access points (for example,
a lobby versus an engineering area). The switch can then assign channels to improve the access point
with the worst performance reported. The load is taken into account when changing the channel structure
to minimize the impact on clients currently in the wireless LAN. This metric keeps track of every access
point’s transmitted and received packet counts to determine how busy the access points are. New clients
avoid an overloaded access point and associate to a new access point. This parameter is disabled by
default.
The switch combines this RF characteristic information with RRM algorithms to make system-wide decisions.
Conflicting demands are resolved using soft-decision metrics that guarantee the best choice for minimizing
network interference. The end result is optimal channel configuration in a three-dimensional space, where
access points on the floor above and below play a major factor in an overall wireless LAN configuration.
Note
Radios using 40-MHz channels in the 2.4-GHz band or or 80MHz channels are not supported by DCA.
The RRM startup mode is invoked in the following conditions:
• In a single-switch environment, the RRM startup mode is invoked after the switch is rebooted.
• In a multiple-switch environment, the RRM startup mode is invoked after an RF Group leader is elected.
You can trigger RRM startup mode from CLI.
RRM startup mode runs for 100 minutes (10 iterations at 10-minute intervals). The duration of the RRM
startup mode is independent of the DCA interval, sensitivity, and network size. The startup mode consists of
10 DCA runs with high sensitivity (making channel changes easy and sensitive to the environment) to converge
to a steady state channel plan. After the startup mode is finished, DCA continues to run at the specified interval
and sensitivity.
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Coverage Hole Detection and Correction
Coverage Hole Detection and Correction
The RRM coverage hole detection algorithm can detect areas of radio coverage in a wireless LAN that are
below the level needed for robust radio performance. This feature can alert you to the need for an additional
(or relocated) lightweight access point.
If clients on a lightweight access point are detected at threshold levels (RSSI, failed client count, percentage
of failed packets, and number of failed packets) lower than those specified in the RRM configuration, the
access point sends a “coverage hole” alert to the switch. The alert indicates the existence of an area where
clients are continually experiencing poor signal coverage, without having a viable access point to which to
roam. The switch discriminates between coverage holes that can and cannot be corrected. For coverage holes
that can be corrected, the switch mitigates the coverage hole by increasing the transmit power level for that
specific access point. The switch does not mitigate coverage holes caused by clients that are unable to increase
their transmit power or are statically set to a power level because increasing their downstream transmit power
might increase interference in the network.
How to Configure RRM
Configuring Advanced RRM CCX Parameters (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm ccx location-measurement interval
3. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm ccx
location-measurement interval
Configures the interval for 802.11 CCX client location
measurements. The range is from 10 to 32400 seconds.
Example:
Switch(config)# ap dot11 24ghz rrm ccx
location-measurement 15
Step 3
Returns to privileged EXEC mode. Alternatively, you can
also press Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
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Configuring Radio Resource Management
Configuring Neighbor Discovery Type (CLI)
Configuring Neighbor Discovery Type (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm ndp-type {protected | transparent}
3. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm ndp-type {protected Configures the neighbor discovery type. By default, the mode is
| transparent}
set to “transparent”.
Example:
Switch(config)#ap dot11 24ghz rrm ndp-type
protected
• protected—Sets the neighbor discover type to protected.
Packets are encrypted.
• transparent—Sets the neighbor discover type to
transparent. Packets are sent as is.
Switch(config)#ap dot11 24ghz rrm ndp-type
transparent
Step 3
end
Returns to privileged EXEC mode. Alternatively, you can also
press Ctrl-Z to exit global configuration mode.
Example:
Switch(config)# end
Configuring RRM Profile Thresholds, Monitoring Channels, and Monitoring
Intervals (GUI)
Step 1
Step 2
Choose Configuration > Wireless > 802.11a/n/ac > RRM > General or Configuration > Wireless > 802.11b/g/n >
RRM > General to open RRM General page.
Configure profile thresholds used for alarming as follows:
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Configuring RRM Profile Thresholds, Monitoring Channels, and Monitoring Intervals (GUI)
The profile thresholds have no bearing on the functionality of the RRM algorithms. Switches send an SNMP
trap (or an alert) to the Cisco Prime Infrastructure or another trap receiver when individual APs values set for
these threshold parameters are exceeded.
In the Interference text box, enter the percentage of interference (802.11 traffic from sources outside of your wireless
network) on a single access point. The valid range is 0 to 100%, and the default value is 10%.
In the Clients text box, enter the number of clients on a single access point. The valid range is 1 to 75, and the default
value is 12.
In the Noise text box, enter the level of noise (non-802.11 traffic) on a single access point. The valid range is –127
to 0 dBm, and the default value is –70 dBm.
In the Utilization text box, enter the percentage of RF bandwidth being used by a single access point. The valid range
is 0 to 100%, and the default value is 80%.
In the Throughput text box, enter the level of Throughput being used by a single access point. The valid range is
1000 to 10000000, and the default value is 1000000.
Note
a)
b)
c)
d)
e)
Step 3
From the Channel List drop-down list, choose one of the following options to specify the set of channels that the access
point uses for RRM scanning:
• All Channels—RRM channel scanning occurs on all channels supported by the selected radio, which includes
channels not allowed in the country of operation.
• Country Channels—RRM channel scanning occurs only on the data channels in the country of operation. This is
the default value.
• DCA Channels—RRM channel scanning occurs only on the channel set used by the DCA algorithm, which by
default includes all of the non-overlapping channels allowed in the country of operation. However, you can specify
the channel set to be used by DCA if desired. To do so, follow instructions in the Dynamic Channel Assignment.
Step 4
Configure monitor intervals as follows:
1 In the Channel Scan Interval text box, enter (in seconds) the sum of the time between scans for each channel within
a radio band. The entire scanning process takes 50 ms per channel, per radio and runs at the interval configured here.
The time spent listening on each channel is determined by the non-configurable 50-ms scan time and the number of
channels to be scanned. For example, in the U.S. all 11 802.11b/g channels are scanned for 50 ms each within the
default 180-second interval. So every 16 seconds, 50 ms is spent listening on each scanned channel (180/11 = ~16
seconds). The Channel Scan Interval parameter determines the interval at which the scanning occurs. The valid range
is 60 to 3600 seconds, and the default value for 802.11a/n/ac and 802.11b/g/n radios is 180 seconds.
2 In the Neighbor Packet Frequency text box, enter (in seconds) how frequently neighbor packets (messages) are
sent, which eventually builds the neighbor list. The valid range is 60 to 3600 seconds, and the default value is 60
seconds.
Note
If the access point radio does not receive a neighbor packet from an existing neighbor within 60 minutes,
the Cisco WLC deletes that neighbor from the neighbor list.
Step 5
Click Apply.
Step 6
Click Save Configuration.
Note
Click Set to Factory Default if you want to return all of the Cisco WLC’s RRM parameters to their factory-default
values.
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Configuring Radio Resource Management
Configuring RF Groups
Configuring RF Groups
This section describes how to configure RF groups through either the GUI or the CLI.
Note
The RF group name is generally set at deployment time through the Startup Wizard. However, you can
change it as necessary.
Note
When the multiple-country feature is being used, all Cisco WLCs intended to join the same RF group
must be configured with the same set of countries, configured in the same order.
Note
You can also configure RF groups using the Cisco Prime Infrastructure.
Configuring the RF Group Mode (GUI)
Step 1
Step 2
Choose Configuration > Wireless > 802.11a/n/ac > RRM > RF Grouping or or Configuration > Wireless > 802.11b/g/n
> RRM > RF Grouping to open the RF Grouping page.
From the Group Mode drop-down list, choose the mode that you want to configure for this Cisco WLC.
You can configure RF grouping in the following modes:
• auto—Sets the RF group selection to automatic update mode.
Note
A configured static leader cannot become a member of another RF group until its mode is set to
“auto”.
• leader—Sets the RF group selection to static mode, and sets this Cisco WLC as the group leader.
• off—Sets the RF group selection off. Every Cisco WLC optimizes its own access point parameters.
Note
Note
A Cisco WLC with a lower priority cannot assume the role of a group leader if a Cisco WLC with a higher
priority is available. Here, priority is related to the processing power of the Cisco WLC.
We recommend that Cisco WLCs participate in automatic RF grouping. You can override RRM settings
without disabling automatic RF group participation.
Step 3
Click Apply to save the configuration and click Restart to restart the RRM RF Grouping algorithm.
Step 4
If you configured RF Grouping mode for this Cisco WLC as a static leader, you can add group members from the Group
Members section as follows:
1 In the switch Name text box, enter the Cisco WLC that you want to add as a member to this group.
2 In the IP Address text box, enter the IP address of the Cisco WLC.
3 Click Add to add the member to this group.
Note
If the member has not joined the static leader, the reason of the failure is shown in parentheses.
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Configuring RF Groups
Step 5
Step 6
Click Apply.
Click Save Configuration.
Configuring RF Group Selection Mode (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm group-mode{auto | leader | off}
3. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm group-mode{auto | Configures RF group selection mode for 802.11 bands.
leader | off}
• auto—Sets the 802.11 RF group selection to automatic update
mode.
Example:
Switch(config)#ap dot11 24ghz rrm
group-mode leader
Step 3
• leader—Sets the 802.11 RF group selection to leader mode.
• off—Disables the 802.11 RF group selection.
Returns to privileged EXEC mode. Alternatively, you can also
press Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring an RF Group Name (CLI)
SUMMARY STEPS
1. configure terminal
2. wireless rf-network name
3. end
4. show network profile profile_number
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Configuring Radio Resource Management
Configuring RF Groups
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
wireless rf-network name
Creates an RF group. The group name should be ASCII String up
to 19 characters and is case sensitive.
Example:
Note
Switch (config)# wireless rf-network
test1
Step 3
Repeat this procedure for each controller that you want to
include in the RF group.
Returns to privileged EXEC mode. Alternatively, you can also press
Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Step 4
show network profile profile_number
Displays the RF group.
Note
You can view the network profile number from 1 to
4294967295.
Configuring an RF Group Name (GUI)
Step 1
Step 2
Step 3
Choose Configuration > Controller > General to open the General page.
Enter a name for the RF group in the RF Group Name text box. The name can contain up to 19 ASCII characters and is
case sensitive.
Click Apply to commit your changes.
Step 4
Click Save Configuration to save your changes.
Step 5
Repeat this procedure for each controller that you want to include in the RF group.
Configuring Members in a 802.11 Static RF Group (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm group-member group_name ip_addr
3. end
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Configuring Radio Resource Management
Configuring Transmit Power Control
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm group-member
group_name ip_addr
Configures members in a 802.11 static RF group. The group
mode should be set as leader for the group member to be
active.
Example:
Switch(config)#ap dot11 24ghz rrm group-member
Grpmem01 10.1.1.1
Step 3
Returns to privileged EXEC mode. Alternatively, you can
also press Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring Transmit Power Control
Configuring the Tx-Power Control Threshold (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm tpc-threshold threshold_value
3. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
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Configuring Radio Resource Management
Configuring Transmit Power Control
Step 2
Command or Action
Purpose
ap dot11 24ghz | 5ghz rrm tpc-threshold
threshold_value
Configures the Tx-power control threshold used by RRM for
auto power assignment. The range is from –80 to –50.
Example:
Switch(config)#ap dot11 24ghz rrm
tpc-threshold -60
Step 3
Returns to privileged EXEC mode. Alternatively, you can
also press Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring the Tx-Power Level (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm txpower{trans_power_level | auto | max | min | once}
3. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm
Configures the 802.11 tx-power level
txpower{trans_power_level | auto | max | min |
• trans_power_level—Sets the transmit power level.
once}
• auto—Enables auto-RF.
Example:
Switch(config)#ap dot11 24ghz rrm txpower
auto
• max—Configures the maximum auto-RF tx-power.
• min—Configures the minimum auto-RF tx-power.
• once—Enables one-time auto-RF.
Step 3
end
Returns to privileged EXEC mode. Alternatively, you can also
press Ctrl-Z to exit global configuration mode.
Example:
Switch(config)# end
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Configuring Transmit Power Control
Configuring Transmit Power Control (GUI)
Step 1
Step 2
Step 3
Choose Configuration > Wireless > 802.11a/n/ac > RRM > TPC or Configuration > Wireless > 802.11b/g/n > RRM
> TPC to open RRM Tx Power Control (TPC) page.
Choose the Transmit Power Control.
Coverage Optimal Mode (TPCv1)— Offers strong signal coverage and stability. In this mode, power can be kept low
to gain extra capacity and reduce interference.
Choose one of the following options from the Power Level Assignment Method list to specify the Cisco WLC’s dynamic
power assignment mode:
• Automatic—Causes the Cisco WLC to periodically evaluate and, if necessary, update the transmit power for all
joined access points. This is the default value.
• On Demand—Causes the Cisco WLC to periodically evaluate the transmit power for all joined access points.
However, the Cisco WLC updates the power, if necessary, only when you click Apply after choosing On Demand.
Note
The Cisco WLC does not evaluate and update the transmit power immediately when you click Apply after
choosing On Demand. It waits for the next 600-second interval. This value is not configurable.
• Fixed—Prevents the Cisco WLC from evaluating and, if necessary, updating the transmit power for joined access
points. The power level is set to the fixed value chosen from the drop-down list. The corresponding option for
Fixed when you try to configure from CLI is once.
Note
Note
Step 4
The transmit power level is assigned an integer value instead of a value in mW or dBm. The integer
corresponds to a power level that varies depending on the regulatory domain, channel, and antennas in
which the access points are deployed.
For optimal performance, we recommend that you use the Automatic
setting.
Enter the maximum and minimum power level assignment values in the Maximum Power Level Assignment and Minimum
Power Level Assignment text boxes.
The range for the Maximum Power Level Assignment is –10 to 30 dBm.
The range for the Minimum Power Level Assignment is –10 to 30 dBm.
Step 5
In the Power Threshold text box, enter the cutoff signal level used by RRM when determining whether to reduce an
access point’s power. The default value for this parameter is –70 dBm for TPCv1, but can be changed when access points
are transmitting at higher (or lower) than desired power levels.
The range for this parameter is –80 to –50 dBm. Increasing this value (between –65 and –50 dBm) causes the access
points to operate at a higher transmit power. Decreasing the value has the opposite effect.
In applications with a dense population of access points, it may be useful to decrease the threshold to –80 or –75 dBm
to reduce the number of BSSIDs (access points) and beacons seen by the wireless clients. Some wireless clients might
have difficulty processing a large number of BSSIDs or a high beacon rate and might exhibit problematic behavior with
the default threshold.
This page also shows the following nonconfigurable transmit power level parameter settings:
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
• Power Neighbor Count—The minimum number of neighbors an access point must have for the transmit power
control algorithm to run.
• Power Assignment Leader—The MAC address of the RF group leader, which is responsible for power level
assignment.
• Last Power Level Assignment—The last time RRM evaluated the current transmit power level assignments.
Step 6
Click Apply.
Step 7
Click Save Configuration.
Configuring 802.11 RRM Parameters
Configuring Advanced 802.11 Channel Assignment Parameters (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm channel cleanair-event sensitivity {high | low | medium}
3. ap dot11 24ghz | 5ghz rrm channel dca{channel number| anchor-time | global{auto| once}| interval
| min-metric | sensitivity{high | low | medium}}
4. ap dot11 5ghz rrm channel dca chan-width-11n {20 | 40}
5. ap dot11 24ghz | 5ghz rrm channel device
6. ap dot11 24ghz | 5ghz rrm channel foreign
7. ap dot11 24ghz | 5ghz rrm channel load
8. ap dot11 24ghz | 5ghz rrm channel noise
9. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm channel
cleanair-event sensitivity {high | low |
medium}
Configures CleanAir event-driven RRM parameters.
• High–Specifies the most sensitivity to non-Wi-Fi interference
as indicated by the air quality (AQ) value.
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Configuring 802.11 RRM Parameters
Command or Action
Purpose
• Low–Specifies the least sensitivity to non-Wi-Fi interference as
indicated by the AQ value.
Example:
Switch(config)#ap dot11 24ghz rrm channel
cleanair-event sensitivity high
Step 3
• Medium–Specifies medium sensitivity to non-Wi-Fi interference
as indicated by the AQ value.
ap dot11 24ghz | 5ghz rrm channel
Configures Dynamic Channel Assignment (DCA) algorithm parameters
dca{channel number| anchor-time | global{auto| for the 802.11 band.
once}| interval | min-metric | sensitivity{high
• <1-14>–Enter a channel number to be added to the DCA list.
| low | medium}}
• anchor-time–Configures the anchor time for the DCA. The range
is between 0 and 23 hours.
Example:
Switch(config)#ap dot11 24ghz rrm channel
dca interval 2
• global–Configures the DCA mode for all 802.11 Cisco APs.
◦auto–Enables auto-RF.
◦once–Enables auto-RF only once.
• interval–Configures the DCA interval value. The values are 1,
2, 3, 4, 6, 8, 12 and 24 hours and the default value 0 denotes 10
minutes.
• min-metric–Configures the DCA minimum RSSI energy metric.
The range is between -100 and -60.
• sensitivity–Configures the DCA sensitivity level to changes in
the environment.
◦high–Specifies the most sensitivity.
◦low–Specifies the least sensitivity.
◦medium–Specifies medium sensitivity.
Step 4
ap dot11 5ghz rrm channel dca
chan-width-11n {20 | 40}
Configures the DCA channel width for all 802.11n radios in the 5-GHz
band.
• 20 sets the channel width for 802.11n radios to 20 MHz. This is
the default value.
• 40 sets the channel width for 802.11n radios to 40 MHz.
Step 5
ap dot11 24ghz | 5ghz rrm channel device
Configures the persistent non-Wi-Fi device avoidance in the 802.11
channel assignment.
Example:
Switch(config)#ap dot11 24ghz rrm channel
device
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
Step 6
Command or Action
Purpose
ap dot11 24ghz | 5ghz rrm channel foreign
Configures the foreign AP 802.11 interference avoidance in the channel
assignment.
Example:
Switch(config)#ap dot11 24ghz rrm channel
foreign
Step 7
ap dot11 24ghz | 5ghz rrm channel load
Configures the Cisco AP 802.11 load avoidance in the channel
assignment.
Example:
Switch(config)#ap dot11 24ghz rrm channel
load
Step 8
ap dot11 24ghz | 5ghz rrm channel noise
Configures the 802.11 noise avoidance in the channel assignment.
Example:
Switch(config)#ap dot11 24ghz rrm channel
noise
Step 9
Returns to privileged EXEC mode. Alternatively, you can also press
Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring Dynamic Channel Assignment (GUI)
You can specify the channels that the Dynamic Channel Assignment (DCA) algorithm considers when selecting
the channels to be used for RRM scanning by using the Cisco WLC GUI.
Note
This functionality is helpful when you know that the clients do not support certain channels because they
are legacy devices or they have certain regulatory restrictions.
Step 1
Disable the 802.11a/n/ac or 802.11b/g/n network as follows:
a) Choose Configuration > Wireless > 802.11a/n/ac > Network or Configuration > Wireless > 802.11b/g/n >
Network to open the Global Parameters page.
b) Unselect the 802.11a/n/ac (or 802.11b/g/n) Network Status check box.
c) Click Apply.
Step 2
Choose Configuration > Wireless > 802.11a/n/ac > RRM > DCA or Configuration > Wireless > 802.11b/g/n > RRM
> DCA to open the Dynamic Channel Assignment (DCA) page.
Step 3
Choose one of the following options from the Channel Assignment Method drop-down list to specify the Cisco WLC’s
DCA mode:
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Configuring 802.11 RRM Parameters
• Automatic—Causes the Cisco WLC to periodically evaluate and, if necessary, update the channel assignment for
all joined access points. This is the default value.
• Freeze—Causes the Cisco WLC to evaluate and update the channel assignment for all joined access points, if
necessary, only when you click Apply after selecting the Freeze option.
Note
The Cisco WLC does not evaluate and update the channel assignment immediately when you click Apply
after selecting the Freeze option. It waits for the next interval to elapse.
• OFF—Turns off DCA and sets all access point radios to the first channel of the band. If you choose this option,
you must manually assign channels on all radios.
Note
Step 4
Step 5
Step 6
For optimal performance, we recommend that you use the Automatic setting. See the Disabling Dynamic
Channel and Power Assignment (GUI) section for instructions on how to disable the Cisco WLC’s dynamic
channel and power settings.
From the Interval drop-down list, choose one of the following options to specify how often the DCA algorithm is allowed
to run: 10 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 12 hours, or 24 hours. The default value is
10 minutes.
From the AnchorTime drop-down list, choose a number to specify the time of day when the DCA algorithm is to start.
The options are numbers between 0 and 23 (inclusive) representing the hour of the day from 12:00 a.m. to 11:00 p.m.
From the DCA Channel Sensitivity drop-down list, choose one of the following options to specify how sensitive the
DCA algorithm is to environmental changes such as signal, load, noise, and interference when determining whether to
change channels:
• Low—The DCA algorithm is not particularly sensitive to environmental changes.
• Medium—The DCA algorithm is moderately sensitive to environmental changes.
• High—The DCA algorithm is highly sensitive to environmental changes.
The default value is Medium. The DCA sensitivity thresholds vary by radio band, as noted in the following table:
Table 4: DCA Sensitivity Thresholds
Step 7
Option
2.4-GHz DCA Sensitivity Threshold
5-GHz DCA Sensitivity Threshold
High
5 dB
5 dB
Medium
10 dB
15 dB
Low
20 dB
20 dB
This page also shows the following nonconfigurable channel parameter settings:
• Channel Assignment Leader—The MAC address of the RF group leader, which is responsible for channel assignment.
Step 8
In the DCA Channel List area, the DCA Channels text box shows the channels that are currently selected. To choose a
channel, select its check box in the Select column. To exclude a channel, unselect its check box.
The ranges are as follows:
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
• 802.11a—36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 132, 136, 140, 149, 153, 157, 161, 165 (depending
on countries).
• 802.11b/g—1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 (depending on countries).
The defaults are as follows:
• 802.11a—36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 132, 136, 140, 149, 153, 157, 161
• 802.11b/g—1, 6, 11
Step 9
Step 10
Click Apply.
Reenable the 802.11 networks as follows:
1 Choose Configuration > Wireless > 802.11a/n/ac > Network or Configuration > Wireless > 802.11b/g/n >
Network to open the Global Parameters page.
2 Select the 802.11a/n/ac (or 802.11b/g/n) Network Status check box.
3 Click Apply.
Step 11
Click Save Configuration.
Configuring 802.11 Coverage Hole Detection (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm coverage data{fail-percentage | packet-count | rssi-threshold}
3. ap dot11 24ghz | 5ghz rrm coverage exception global exception level
4. ap dot11 24ghz | 5ghz rrm coverage level global cli_min exception level
5. ap dot11 24ghz | 5ghz rrm coverage voice{fail-percentage | packet-count | rssi-threshold}
6. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm coverage
data{fail-percentage | packet-count |
rssi-threshold}
Configures the 802.11 coverage hole detection for data packets.
• fail-percentage—Configures the 802.11 coverage failure-rate
threshold for uplink data packets as a percentage that ranges
from 1 to 100%.
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Configuring 802.11 RRM Parameters
Command or Action
Purpose
• packet-count—Configures the 802.11 coverage minimum
failure count threshold for uplink data packets that ranges from
1 to 255.
Example:
Switch(config)#ap dot11 24ghz rrm coverage
data fail-percentage 60
Step 3
• rssi-threshold—Configures the 802.11 minimum receive
coverage level for data packets that range from –90 to –60 dBm.
ap dot11 24ghz | 5ghz rrm coverage exception Configures the 802.11 Cisco AP coverage exception level as a
percentage that ranges from 0 to 100%.
global exception level
Example:
Switch(config)#ap dot11 24ghz rrm coverage
exception global 50
Step 4
ap dot11 24ghz | 5ghz rrm coverage level global Configures the 802.11 Cisco AP client minimum exception level that
ranges from 1 to 75 clients.
cli_min exception level
Example:
Switch(config)#ap dot11 24ghz rrm coverage
level global 10
Step 5
ap dot11 24ghz | 5ghz rrm coverage
voice{fail-percentage | packet-count |
rssi-threshold}
Configures the 802.11 coverage hole detection for voice packets.
• fail-percentage—Configures the 802.11 coverage failure-rate
threshold for uplink voice packets as a percentage that ranges
from 1 to 100%.
Example:
• packet-count—Configures the 802.11 coverage minimum
failure count threshold for uplink voice packets that ranges from
1 to 255.
Switch(config)#ap dot11 24ghz rrm coverage
voice packet-count 10
• rssi-threshold—Configures the 802.11 minimum receive
coverage level for voice packets that range from –90 to –60
dBm.
Step 6
Returns to privileged EXEC mode. Alternatively, you can also press
Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring Coverage Hole Detection (GUI)
Step 1
Disable the 802.11 network as follows:
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
a) Choose Configuration > Wireless > 802.11a/n/ac or Configuration > Wireless > 802.11b/g/n to open the
802.11a/n/ac (or 802.11b/g/n) Global Parameters page.
b) Unselect the 802.11a/n/ac (or 802.11b/g/n) Network Status check box.
c) Click Apply.
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Choose Configuration > Wireless > 802.11a/n/ac > RRM > Coverage Thresholds or Configuration > Wireless >
802.11b/g/n > RRM > Coverage Thresholds to open coverage page.
Select the Enable Coverage Hole Detection check box to enable coverage hole detection, or unselect it to disable this
feature. If you enable coverage hole detection, the Cisco WLC automatically determines, based on data received from
the access points, if any access points have clients that are potentially located in areas with poor coverage. The default
value is selected.
In the Data RSSI text box, enter the minimum Receive Signal Strength Indication (RSSI) value for data packets received
by the access point. The value that you enter is used to identify coverage holes (or areas of poor coverage) within your
network. If the access point receives a packet in the data queue with an RSSI value below the value that you enter here,
a potential coverage hole has been detected. The valid range is –90 to –60 dBm, and the default value is –80 dBm. The
access point takes data RSSI measurements every 5 seconds and reports them to the Cisco WLC in 90-second intervals.
In the Voice RSSI text box, enter the minimum Receive Signal Strength Indication (RSSI) value for voice packets
received by the access point. The value that you enter is used to identify coverage holes within your network. If the
access point receives a packet in the voice queue with an RSSI value below the value that you enter here, a potential
coverage hole has been detected. The valid range is –90 to –60 dBm, and the default value is –80 dBm. The access point
takes voice RSSI measurements every 5 seconds and reports them to the Cisco WLC in 90-second intervals.
In the Min Failed Client Count per AP text box, enter the minimum number of clients on an access point with an RSSI
value at or below the data or voice RSSI threshold. The valid range is 1 to 75, and the default value is 3.
In the Coverage Exception Level per AP text box, enter the percentage of clients on an access point that are experiencing
a low signal level but cannot roam to another access point. The valid range is 0 to 100%, and the default value is 25%.
Note
If both the number and percentage of failed packets exceed the values configured for Failed Packet Count and
Failed Packet Percentage (configurable through the Cisco WLC CLI) for a 5-second period, the client is considered
to be in a pre-alarm condition. The Cisco WLC uses this information to distinguish between real and false
coverage holes. False positives are generally due to the poor roaming logic implemented on most clients. A
coverage hole is detected if both the number and percentage of failed clients meet or exceed the values entered
in the Min Failed Client Count per AP and Coverage Exception Level per AP text boxes over two 90-second
periods (a total of 180 seconds). The Cisco WLC determines if the coverage hole can be corrected and, if
appropriate, mitigates the coverage hole by increasing the transmit power level for that specific access point.
Step 8
Click Apply.
Step 9
Reenable the 802.11 network as follows:
a) Choose Configuration > Wireless > 802.11a/n/ac > Network or Configuration > Wireless > 802.11b/g/n >
Network to open the 802.11a (or 802.11b/g) Global Parameters page.
b) Select the 802.11a/n/ac (or 802.11b/g/n) Network Status check box.
c) Click Apply.
Step 10
Click Save Configuration.
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
Configuring 802.11 Event Logging (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm logging{channel | coverage | foreign | load | noise | performance | txpower}
3. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm logging{channel | coverage Configures event-logging for various parameters.
| foreign | load | noise | performance | txpower}
• channel—Configures the 802.11 channel change logging
mode.
Example:
Switch(config)#ap dot11 24ghz rrm logging
channel
• coverage—Configures the 802.11 coverage profile logging
mode.
Switch(config)#ap dot11 24ghz rrm logging
coverage
• foreign—Configures the 802.11 foreign interference profile
logging mode.
Switch(config)#ap dot11 24ghz rrm logging
foreign
• load—Configures the 802.11 load profile logging mode.
Switch(config)#ap dot11 24ghz rrm logging load
Switch(config)#ap dot11 24ghz rrm logging noise
Switch(config)#ap dot11 24ghz rrm logging
performance
Switch(config)#ap dot11 24ghz rrm logging
txpower
Step 3
end
• noise—Configures the 802.11 noise profile logging mode.
• performance—Configures the 802.11 performance profile
logging mode.
• txpower—Configures the 802.11 transmit power change
logging mode.
Returns to privileged EXEC mode. Alternatively, you can also
press Ctrl-Z to exit global configuration mode.
Example:
Switch(config)# end
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
Configuring 802.11 Statistics Monitoring (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm monitor channel-list{all | country | dca}
3. ap dot11 24ghz | 5ghz rrm monitor coverage interval
4. ap dot11 24ghz | 5ghz rrm monitor load interval
5. ap dot11 24ghz | 5ghz rrm monitor noise interval
6. ap dot11 24ghz | 5ghz rrm monitor signal interval
7. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm monitor channel-list{all Sets the 802.11 monitoring channel-list for parameters such
as noise/interference/rogue.
| country | dca}
Example:
Switch(config)#ap dot11 24ghz rrm monitor
channel-list all
• all— Monitors all channels.
• country— Monitor channels used in configured country
code.
• dca— Monitor channels used by dynamic channel
assignment.
Step 3
ap dot11 24ghz | 5ghz rrm monitor coverage interval Configures the 802.11 coverage measurement interval in
seconds that ranges from 60 to 3600.
Example:
Switch(config)#ap dot11 24ghz rrm monitor
coverage 600
Step 4
ap dot11 24ghz | 5ghz rrm monitor load interval
Configures the 802.11 load measurement interval in seconds
that ranges from 60 to 3600.
Example:
Switch(config)#ap dot11 24ghz rrm monitor load
180
Step 5
ap dot11 24ghz | 5ghz rrm monitor noise interval
Configures the 802.11 noise measurement interval (channel
scan interval) in seconds that ranges from 60 to 3600.
Example:
Switch(config)#ap dot11 24ghz rrm monitor noise
360
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Configuring Radio Resource Management
Configuring 802.11 RRM Parameters
Step 6
Command or Action
Purpose
ap dot11 24ghz | 5ghz rrm monitor signal interval
Configures the 802.11 signal measurement interval (neighbor
packet frequency) in seconds that ranges from 60 to 3600.
Example:
Switch(config)#ap dot11 24ghz rrm monitor
signal 480
Step 7
Returns to privileged EXEC mode. Alternatively, you can
also press Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring the 802.11 Performance Profile (CLI)
SUMMARY STEPS
1. configure terminal
2. ap dot11 24ghz | 5ghz rrm profile clients cli_threshold_value
3. ap dot11 24ghz | 5ghz rrm profile foreign int_threshold_value
4. ap dot11 24ghz | 5ghz rrm profile noise for_noise_threshold_value
5. ap dot11 24ghz | 5ghz rrm profile throughput throughput_threshold_value
6. ap dot11 24ghz | 5ghz rrm profile utilization rf_util_threshold_value
7. end
DETAILED STEPS
Step 1
Command or Action
Purpose
configure terminal
Enters global configuration mode.
Example:
Switch# configure terminal
Step 2
ap dot11 24ghz | 5ghz rrm profile clients
cli_threshold_value
Sets the threshold value for 802.11 Cisco AP clients
that range between 1 and 75 clients.
Example:
Switch(config)#ap dot11 24ghz rrm profile clients
20
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Configuring Radio Resource Management
Configuring Rogue Access Point Detection in RF Groups
Step 3
Command or Action
Purpose
ap dot11 24ghz | 5ghz rrm profile foreign
int_threshold_value
Sets the threshold value for 802.11 foreign interference
that ranges between 0 and 100%.
Example:
Switch(config)#ap dot11 24ghz rrm profile foreign
50
Step 4
ap dot11 24ghz | 5ghz rrm profile noise
for_noise_threshold_value
Sets the threshold value for 802.11 foreign noise ranges
between –127 and 0 dBm.
Example:
Switch(config)#ap dot11 24ghz rrm profile noise -65
Step 5
ap dot11 24ghz | 5ghz rrm profile throughput
throughput_threshold_value
Sets the threshold value for 802.11 Cisco AP throughput
that ranges between 1000 and 10000000 bytes per
second.
Example:
Switch(config)#ap dot11 24ghz rrm profile throughput
10000
Step 6
ap dot11 24ghz | 5ghz rrm profile utilization
rf_util_threshold_value
Sets the threshold value for 802.11 RF utilization that
ranges between 0 to 100%.
Example:
Switch(config)#ap dot11 24ghz rrm profile
utilization 75
Step 7
Returns to privileged EXEC mode. Alternatively, you
can also press Ctrl-Z to exit global configuration mode.
end
Example:
Switch(config)# end
Configuring Rogue Access Point Detection in RF Groups
Configuring Rogue Access Point Detection in RF Groups (CLI)
Before You Begin
Ensure that each Cisco WLC in the RF group has been configured with the same RF group name.
Note
The name is used to verify the authentication IE in all beacon frames. If the Cisco WLCs have different
names, false alarms will occur.
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Configuring Radio Resource Management
Configuring Rogue Access Point Detection in RF Groups
SUMMARY STEPS
1. ap name Cisco_AP mode {local | monitor}
2. end
3. configure terminal
4. wireless wps ap-authentication
5. wireless wps ap-authentication threshold value
DETAILED STEPS
Command or Action
Step 1
Purpose
ap name Cisco_AP mode {local | monitor} Configures a particular access point for local (normal) mode or monitor
(listen-only) mode. Perform this step for every access point connected to
the Cisco WLC.
Example:
Switch# ap name ap1 mode local
Step 2
Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z
to exit global configuration mode.
end
Example:
Switch(config)# end
Step 3
Enters global configuration mode.
configure terminal
Example:
Switch# configure terminal
Step 4
wireless wps ap-authentication
Enables rogue access point detection.
Example:
Switch (config)# wireless wps
ap-authentication
Step 5
wireless wps ap-authentication threshold Specifies when a rogue access point alarm is generated. An alarm occurs
when the threshold value (which specifies the number of access point
value
frames with an invalid authentication IE) is met or exceeded within the
detection period.
Example:
Switch (config)# wireless wps
ap-authentication threshold 50
The valid threshold range is from 1 to 255, and the default threshold value
is 1. To avoid false alarms, you may want to set the threshold to a higher
value.
Note
Note
Enable rogue access point detection and threshold value on every
Cisco WLC in the RF group.
If rogue access point detection is not enabled on every Cisco
WLC in the RF group, the access points on the Cisco WLCs with
this feature disabled are reported as rogues.
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Configuring Radio Resource Management
Monitoring RRM Parameters and RF Group Status
Enabling Rogue Access Point Detection in RF Groups (GUI)
Step 1
Step 2
Step 3
Step 4
Make sure that each Cisco WLC in the RF group has been configured with the same RF group name.
Note
The name is used to verify the authentication IE in all beacon frames. If the Cisco WLCs have different names,
false alarms will occur.
Choose Configuration > Wireless > Access Points > All APs to open the All APs page.
Click the name of an access point to open the All APs > Edit page.
Choose either local or monitor from the AP Mode drop-down list and click Apply to commit your changes.
Step 5
Click Save Configuration to save your changes.
Step 6
Step 7
Repeat Step 2 through Step 5 for every access point connected to the Cisco WLC.
Choose Configuration > Security > Wireless Protection Policies > AP Authentication/MFP to open the AP
Authentication Policy page.
The name of the RF group to which this Cisco WLC belongs appears at the top of the page.
Step 8
Choose AP Authentication from the Protection Type drop-down list to enable rogue access point detection.
Step 9
Step 10
Enter a number in the Alarm Trigger Threshold edit box to specify when a rogue access point alarm is generated. An
alarm occurs when the threshold value (which specifies the number of access point frames with an invalid authentication
IE) is met or exceeded within the detection period.
Note
The valid threshold range is from1 to 255, and the default threshold value is 1. To avoid false alarms, you may
want to set the threshold to a higher value.
Click Apply to commit your changes.
Step 11
Click Save Configuration to save your changes.
Step 12
Repeat this procedure on every Cisco WLC in the RF group.
Note
If rogue access point detection is not enabled on every Cisco WLC in the RF group, the access points on the
Cisco WLCs with this feature disabled are reported as rogues.
Monitoring RRM Parameters and RF Group Status
Monitoring RRM Parameters
Table 5: Commands for monitoring Radio Resource Management
Commands
Description
show ap dot11 24ghz ccx
Displays the 802.11b CCX information for all Cisco
APs.
show ap dot11 24ghz channel
Displays the configuration and statistics of the
802.11b channel assignment.
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Monitoring RRM Parameters
Commands
Description
show ap dot11 24ghz coverage
Displays the configuration and statistics of the
802.11b coverage.
show ap dot11 24ghz group
Displays the configuration and statistics of the
802.11b grouping.
show ap dot11 24ghz l2roam
Displays 802.11b l2roam information.
show ap dot11 24ghz logging
Displays the configuration and statistics of the
802.11b event logging.
show ap dot11 24ghz monitor
Displays the configuration and statistics of the
802.11b monitoring.
show ap dot11 24ghz profile
Displays 802.11b profiling information for all Cisco
APs.
show ap dot11 24ghz receiver
Displays the configuration and statistics of the
802.11b receiver.
show ap dot11 24ghz summary
Displays the configuration and statistics of the
802.11b Cisco APs.
show ap dot11 24ghz txpower
Displays the configuration and statistics of the
802.11b transmit power control.
show ap dot11 5ghz ccx
Displays 802.11a CCX information for all Cisco APs.
show ap dot11 5ghz channel
Displays the configuration and statistics of the
802.11a channel assignment.
show ap dot11 5ghz coverage
Displays the configuration and statistics of the
802.11a coverage.
show ap dot11 5ghz group
Displays the configuration and statistics of the
802.11a grouping.
show ap dot11 5ghz l2roam
Displays 802.11a l2roam information.
show ap dot11 5ghz logging
Displays the configuration and statistics of the
802.11a event logging.
show ap dot11 5ghz monitor
Displays the configuration and statistics of the
802.11a monitoring.
show ap dot11 5ghz profile
Displays 802.11a profiling information for all Cisco
APs.
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Configuring Radio Resource Management
Monitoring RF Group Status (CLI)
Commands
Description
show ap dot11 5ghz receiver
Displays the configuration and statistics of the
802.11a receiver.
show ap dot11 5ghz summary
Displays the configuration and statistics of the
802.11a Cisco APs.
show ap dot11 5ghz txpower
Displays the configuration and statistics of the
802.11a transmit power control.
Monitoring RF Group Status (CLI)
This section describes the new commands for RF group status.
The following commands can be used to monitor RF group status on the switch.
Table 6: Monitoring Aggressive Load Balancing Command
Command
Purpose
show ap dot11 5ghz group
Displays the Cisco WLC name which is the RF group
leader for the 802.11a RF network.
show ap dot11 24ghz group
Displays the Cisco WLC name which is the RF group
leader for the 802.11b/g RF network.
Monitoring RF Group Status (GUI)
Step 1
Choose Configuration > Wireless > 802.11a/n/ac > or 802.11b/g/n > RRM > RF Grouping to open the RF Grouping
Algorithm page.
This page shows the details of the RF group, displaying the configurable parameter Group mode, the Group role of
this Cisco WLC, the Group Update Interval and the Cisco WLC name and IP address of the Group Leader to this
Cisco WLC.
Note
RF grouping mode can be set using the Group Mode drop-down list.
Tip Once a Cisco WLC has joined as a static member and you want to change the grouping mode, we recommend
that you remove the member from the configured static-leader and also make sure that a member Cisco WLC
has not been configured to be a member on multiple static leaders. This is to avoid repeated join attempts from
one or more RF static leaders.
Step 2
(Optional) Repeat this procedure for the network type that you did not select (802.11a/n/ac or 802.11b/g/n).
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Configuring Radio Resource Management
Examples: RF Group Configuration
Examples: RF Group Configuration
This example shows how to configure RF group name:
Switch# configure terminal
Switch(config)# wireless rf-network test1
Switch(config)# ap dot11 24ghz shutdown
Switch(config)# end
Switch # show network profile 5
This example shows how to configure rogue access point detection in RF groups:
Switch# ap name ap1 mode local
Switch# end
Switch# configure terminal
Switch(config)# wireless wps ap-authentication
Switch(config)# wireless wps ap-authentication threshold 50
Switch(config)# end
Additional References for Radio Resource Management
Related Documents
Related Topic
Document Title
RRM commands and their details
RRM Command Reference, Cisco IOS XE Release
3SE (Catalyst 3650 Switches)
MIBs
MIB
MIBs Link
All supported MIBs for this release.
To locate and download MIBs for selected platforms,
Cisco IOS releases, and feature sets, use Cisco MIB
Locator found at the following URL:
http://www.cisco.com/go/mibs
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Configuring Radio Resource Management
Feature History and Information For Performing Radio Resource Management Configuration
Technical Assistance
Description
Link
The Cisco Support website provides extensive online http://www.cisco.com/support
resources, including documentation and tools for
troubleshooting and resolving technical issues with
Cisco products and technologies.
To receive security and technical information about
your products, you can subscribe to various services,
such as the Product Alert Tool (accessed from Field
Notices), the Cisco Technical Services Newsletter,
and Really Simple Syndication (RSS) Feeds.
Access to most tools on the Cisco Support website
requires a Cisco.com user ID and password.
Feature History and Information For Performing Radio Resource
Management Configuration
Release
Feature Information
Cisco IOS XE 3.3SE
This feature was introduced.
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INDEX
A
I
All APs page 54
AnchorTime parameter 45
AP Mode parameter 54
interference 32
Interference threshold parameter 35
Interval parameter 45
Invoke Channel Update Now button 45
Invoke Power Update Now button 41
C
Channel Assignment Leader parameter 45
Channel Assignment Method parameter 44
Channel Scan Duration parameter 35
Configure RF Group Mode 36
Using GUI 36
Coverage Exception Level per AP parameter 48
coverage hole detection 47, 48
configuring per controller 47, 48
using the GUI 47, 48
coverage hole detection and correction 33
M
Min Failed Client Count per AP parameter 48
mobility groups 27
difference from RF groups 27
monitor intervals, configuring using the GUI 35
N
Neighbor Packet Frequency parameter 35
D
DCA Channel Sensitivity parameter 45
DCA Channels parameter 45
dynamic channel assignment (DCA) 31
described 31
P
Power Neighbor Count parameter 42
Power Threshold parameter 41
Protection Type parameter 54
E
R
Enable Coverage Hole Detection parameter 48
radio resource management (RRM) 29, 33, 35, 41, 44, 46, 47
configuring 35
monitor intervals using the GUI 35
coverage hole detection 33, 47
configuring per controller using the GUI 47
described 33
specifying channels 44, 46
update interval 29
Wireless > 802.11a/n (or 802.11b/g/n) > RRM > TPC
parameter 41
G
General (controller) page 38
configuring an RF group 38
Group Mode parameter 56
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Index
RF group leader 27, 28
described 27, 28
RF group name 29
described 29
RF groups 28, 29, 56
cascading 28
monitoring status 56
using the GUI 56
overview 29
pinning 28
viewing status 56
using the GUI 56
RF-Network Name parameter 38
rogue access points 54
alarm 54
S
Set to Factory Default button 35
V
Voice RSSI parameter 48
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