Cisco Systems 7300-6T3 Network Card User Manual

Clear Channel 6-Port T3 (DS3) Line Card
Installation and Configuration
Product Numbers: 7300-6T3
Platform Supported: Cisco 7304
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Text Part Number: OL-3449-02
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Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration
Copyright © 2003, Cisco Systems, Inc.
All rights reserved.
C O N T E N T S
Preface
vii
Objectives
vii
Organization
vii
Related Documentation
viii
Obtaining Documentation viii
Cisco.com viii
Documentation CD-ROM ix
Ordering Documentation ix
Documentation Feedback ix
Obtaining Technical Assistance x
Cisco.com x
Technical Assistance Center x
Cisco TAC Website xi
Cisco TAC Escalation Center
xi
Obtaining Additional Publications and Information
CHAPTER
1
Overview
1-1
Line Card Overview
Features
1-1
1-2
Interoperability Guidelines for 6T3 Line Card DSUs
Maintenance Data Link Messages 1-3
LEDs
T3 SMB Cables 1-4
Ordering Cables 1-6
Building Your Own Cables
1-6
Management Information Base
1-7
Identifying Interface Addresses 1-9
Cisco 7304 Router Interface Addresses
2
1-3
1-3
Line Card Slot Locations on the Supported Platform
Cisco 7304 Router Slot Numbering 1-8
CHAPTER
xi
Preparing for Installation
1-7
1-9
2-1
Required Tools and Equipment
2-1
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Contents
Software and Hardware Requirements
2-2
75-Ohm In-Line Coaxial Attenuator (Optional)
Safety Guidelines 2-2
Safety Warnings 2-2
Warning Definition 2-3
Electrical Equipment Guidelines 2-7
Telephone Wiring Guidelines 2-8
Preventing Electrostatic Discharge Damage
CHAPTER
3
Removing and Installing Line Cards
Installation Overview
Handling Line Cards
2-2
2-8
3-1
3-1
3-2
Online Insertion and Removal
Warnings and Cautions
3-2
3-3
Line Card Removal and Installation 3-3
Cisco 7304—Removing and Installing a Line Card
CHAPTER
4
Connecting a T3 SMB Cable
3-5
Configuring the 6T3 Line Card
4-1
Using the EXEC Command Interpreter
3-4
4-1
Configuring the Interfaces 4-2
Shutting Down an Interface 4-2
Performing a Basic Configuration 4-4
Customizing the 6T3 Line Card Configuration 4-6
Verifying Local and Remote DS3 Port Settings
Selecting a DSU Mode 4-6
Setting the Sending and Receiving Rate 4-7
Configuring the DSU Bandwidth Range 4-7
Enabling Payload Scrambling 4-7
Configuring Cyclic Redundancy Checks 4-7
Configuring the Clock Source 4-8
Defining the DSU Mode 4-8
Enabling T3 Scrambling 4-9
Specifying T3 Framing 4-9
Setting the Cable Length 4-9
4-6
Checking the Configuration 4-9
Using show Commands to Verify the New Interface Status
Using the show version or show hardware Commands
4-10
4-11
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Using the show diag Command 4-12
Using the show interfaces Command 4-13
DS3 Alarm and Event Detection 4-14
Using the ping Command to Verify Network Connectivity
Using loopback Commands 4-15
Bit Error Rate Testing 4-17
CLI-Controlled OIR
4-15
4-17
Line Card Crash Recovery
4-17
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Contents
Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration
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Preface
This preface describes the objectives and organization of this document and explains how to find
additional information on related products and services. This preface contains the following sections:
•
Objectives, page vii
•
Organization, page vii
•
Related Documentation, page viii
•
Obtaining Documentation, page viii
•
Obtaining Technical Assistance, page x
•
Obtaining Additional Publications and Information, page xi
Objectives
This document describes how to install and configure the clear channel 6-port T3 (DS3) line card
(7300-6T3[=]), hereafter referred to as the 6T3 line card, which is used in the Cisco 7304 router.
Organization
This document contains the following chapters:
Section
Title
Description
Chapter 1
Overview
Describes the 6T3 line card and its LED
displays, cables, and receptacles.
Chapter 2
Preparing for Installation
Describes safety considerations, tools required,
and procedures you should perform before the
actual installation.
Chapter 3
Removing and Installing Line Cards
Describes the procedures for installing and
removing the 6T3 line card in the supported
platform.
Chapter 4
Configuring the 6T3 Line Card
Provides instructions for configuring the 6T3
line card on the supported platform.
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Preface
Related Documentation
Related Documentation
Your router and the Cisco IOS software running on it contain extensive features and functionality, which
are documented in the following resources:
•
Cisco IOS software:
For configuration information and support, refer to the modular configuration and modular
command reference publications in the Cisco IOS software configuration documentation set that
corresponds to the software release installed on your Cisco hardware.
Note
•
You can access Cisco IOS software configuration and hardware installation
and maintenance documentation on the World Wide Web at
http://www.cisco.com. Translated documentation is available at the following
URL: http://www.cisco.com/public/countries_languages.shtml.
Cisco 7304 router:
– For hardware installation and maintenance information, refer to the Cisco 7304 Router
Installation and Configuration Guide that shipped with your Cisco 7304 router.
– Cisco 7304 Router Quick Start Guide
•
For international agency compliance, safety, and statutory information for WAN interfaces:
– Site Preparation and Safety Guide
– Regulatory Compliance and Safety Information for Cisco 7304 Routers
•
To view Cisco documentation or obtain general information about the documentation, refer to the
following sources:
– “Obtaining Documentation” section on page viii.
– “Obtaining Technical Assistance” section on page x.
– “Obtaining Additional Publications and Information” section on page xi
– Customer service at 800 553-6387 or 408 526-7208. Customer service hours are 5:00 a.m. to
6:00 p.m. Pacific time, Monday through Friday (excluding Cisco-observed holidays).
The Cisco Information Packet that shipped with your router.
Obtaining Documentation
Cisco provides several ways to obtain documentation, technical assistance, and other technical
resources. These sections explain how to obtain technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation on the World Wide Web at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
http://www.cisco.com
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Obtaining Documentation
International Cisco websites can be accessed from this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation CD-ROM
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM
package, which may have shipped with your product. The Documentation CD-ROM is updated regularly
and may be more current than printed documentation. The CD-ROM package is available as a single unit
or through an annual or quarterly subscription.
Registered Cisco.com users can order a single Documentation CD-ROM (product number
DOC-CONDOCCD=) through the Cisco Ordering tool:
http://www.cisco.com/en/US/partner/ordering/ordering_place_order_ordering_tool_launch.html
All users can order monthly or quarterly subscriptions through the online Subscription Store:
http://www.cisco.com/go/subscription
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
•
Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from
the Networking Products MarketPlace:
http://www.cisco.com/en/US/partner/ordering/index.shtml
•
Nonregistered Cisco.com users can order documentation through a local account representative by
calling Cisco Systems Corporate Headquarters (California, U.S.A.) at 408 526-7208 or, elsewhere
in North America, by calling 800 553-NETS (6387).
Documentation Feedback
You can submit comments electronically on Cisco.com. On the Cisco Documentation home page, click
Feedback at the top of the page.
You can e-mail your comments to bug-doc@cisco.com.
You can submit comments by using the response card (if present) behind the front cover of your
document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
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Preface
Obtaining Technical Assistance
Obtaining Technical Assistance
Cisco provides Cisco.com, which includes the Cisco Technical Assistance Center (TAC) website, as a
starting point for all technical assistance. Customers and partners can obtain online documentation,
troubleshooting tips, and sample configurations from the Cisco TAC website. Cisco.com registered
users have complete access to the technical support resources on the Cisco TAC website, including TAC
tools and utilities.
Cisco.com
Cisco.com offers a suite of interactive, networked services that let you access Cisco information,
networking solutions, services, programs, and resources at any time, from anywhere in the world.
Cisco.com provides a broad range of features and services to help you with these tasks:
•
Streamline business processes and improve productivity
•
Resolve technical issues with online support
•
Download and test software packages
•
Order Cisco learning materials and merchandise
•
Register for online skill assessment, training, and certification programs
To obtain customized information and service, you can self-register on Cisco.com at this URL:
http://tools.cisco.com/RPF/register/register.do
Technical Assistance Center
The Cisco TAC is available to all customers who need technical assistance with a Cisco product,
technology, or solution. Two types of support are available: the Cisco TAC website and the Cisco TAC
Escalation Center. The type of support that you choose depends on the priority of the problem and the
conditions stated in service contracts, when applicable.
We categorize Cisco TAC inquiries according to urgency:
•
Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities,
product installation, or basic product configuration. There is little or no impact to your business
operations.
•
Priority level 3 (P3)—Operational performance of the network is impaired, but most business
operations remain functional. You and Cisco are willing to commit resources during normal
business hours to restore service to satisfactory levels.
•
Priority level 2 (P2)—Operation of an existing network is severely degraded, or significant aspects
of your business operations are negatively impacted by inadequate performance of Cisco products.
You and Cisco will commit full-time resources during normal business hours to resolve the
situation.
•
Priority level 1 (P1)—An existing network is “down,” or there is a critical impact to your business
operations. You and Cisco will commit all necessary resources around the clock to resolve the
situation.
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Obtaining Additional Publications and Information
Cisco TAC Website
The Cisco TAC website provides online documents and tools to help troubleshoot and resolve technical
issues with Cisco products and technologies. To access the Cisco TAC website, go to this URL:
http://www.cisco.com/tac
All customers, partners, and resellers who have a valid Cisco service contract have complete access to
the technical support resources on the Cisco TAC website. Some services on the Cisco TAC website
require a Cisco.com login ID and password. If you have a valid service contract but do not have a login
ID or password, go to this URL to register:
http://tools.cisco.com/RPF/register/register.do
If you are a Cisco.com registered user, and you cannot resolve your technical issues by using the Cisco
TAC website, you can open a case online at this URL:
http://www.cisco.com/tac/caseopen
If you have Internet access, we recommend that you open P3 and P4 cases online so that you can fully
describe the situation and attach any necessary files.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These
classifications are assigned when severe network degradation significantly impacts business operations.
When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer
automatically opens a case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to this URL:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
Before calling, please check with your network operations center to determine the Cisco support services
to which your company is entitled: for example, SMARTnet, SMARTnet Onsite, or Network Supported
Accounts (NSA). When you call the center, please have available your service agreement number and
your product serial number.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online
and printed sources.
•
The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as
ordering and customer support services. Access the Cisco Product Catalog at this URL:
http://www.cisco.com/en/US/products/products_catalog_links_launch.html
•
Cisco Press publishes a wide range of networking publications. Cisco suggests these titles for new
and experienced users: Internetworking Terms and Acronyms Dictionary, Internetworking
Technology Handbook, Internetworking Troubleshooting Guide, and the Internetworking Design
Guide. For current Cisco Press titles and other information, go to Cisco Press online at this URL:
http://www.ciscopress.com
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Preface
Obtaining Additional Publications and Information
•
Packet magazine is the Cisco quarterly publication that provides the latest networking trends,
technology breakthroughs, and Cisco products and solutions to help industry professionals get the
most from their networking investment. Included are networking deployment and troubleshooting
tips, configuration examples, customer case studies, tutorials and training, certification information,
and links to numerous in-depth online resources. You can access Packet magazine at this URL:
http://www.cisco.com/go/packet
•
iQ Magazine is the Cisco bimonthly publication that delivers the latest information about Internet
business strategies for executives. You can access iQ Magazine at this URL:
http://www.cisco.com/go/iqmagazine
•
Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering
professionals involved in designing, developing, and operating public and private internets and
intranets. You can access the Internet Protocol Journal at this URL:
http://www.cisco.com/en/US/about/ac123/ac147/about_cisco_the_internet_protocol_journal.html
•
Training—Cisco offers world-class networking training. Current offerings in network training are
listed at this URL:
http://www.cisco.com/en/US/learning/le31/learning_recommended_training_list.html
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1
C H A P T E R
Overview
This chapter describes the 6T3 line card and contains the following sections:
•
Line Card Overview, page 1-1
•
Features, page 1-2
•
Interoperability Guidelines for 6T3 Line Card DSUs, page 1-3
•
LEDs, page 1-3
•
T3 SMB Cables, page 1-4
•
Management Information Base, page 1-7
•
Line Card Slot Locations on the Supported Platform, page 1-7
•
Identifying Interface Addresses, page 1-9
Line Card Overview
The 6T3 line card provides a full-duplex operation at T3 (45 Mbps) speed. It supports both 16- and 32-bit
cyclic redundancy checks (CRCs); the default is 16-bit CRC. You can change the default setting with
software commands.
The 6-port 6T3 line card, shown in Figure 1-1, provides up to 24 network interfaces per Cisco 7304
router.
Figure 1-1
6T3 Line Card
7300-6T3
TX
RX
TX
RX
TX
RX
TX
RX
TX
RX
TX
RX
0
1
2
3
4
5
LNK
LNK
LNK
LNK
LNK
LNK
STATUS
66771
OIR
6-PORT T3 DSU
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Chapter 1
Overview
Features
Features
The 6T3 line card provides the following features:
•
Single-wide line card for the Cisco 7304 router
•
Full-duplex synchronous serial DS3 interface
•
High-Level Data Link Control (HDLC) data
•
Integrated data service unit (DSU) functionality
•
Support for 16- and 32-bit cyclic redundancy checks (CRCs)
•
Support for Frame Relay, HDLC, and PPP serial encapsulations
•
Support for DS3 MIB (RFC 1407)
•
Support for remote and local loopbacks
•
Six independent T3 ports
•
Subrate DS3 support for Cisco, Kentrox, Larscom, and Digital Link formats along with the
associated scrambling. In some modes, the scrambling is optional.
•
Clear-channel DS3 (framed but unchannelized)
•
M23 and C-bit-parity DS3 frame formats
•
Extraction of BOCs on the C-bit far-end alarm and control (FEAC) code
•
Detects and counts remote alarm indication (RAI), parity errors, far-end block error (FEBE), line
code violation (LCV), loss of light (LOL), out of frame (OOF), framing errors, loss of frame (LOF),
loss of signal (LOS)
•
One-second performance monitoring counters
•
Generates AIS and FEAC
•
Generates F-, X-, P-, and M-bit errors; LCVs; all zeros; RAI; and FEBE for testing
•
Line, payload, and diagnostic loopbacks
•
One bicolor LED per T3 port
•
Drives up to 900 feet of 75-ohm coaxial cable RG-59U or equivalent, 450 feet to DSX-3
demarcation point (DSX)
•
75-ohm SMB-type coaxial connections over ATT 734/728, 75-ohm coaxial cable
•
B3ZS line coding
•
Maintenance data link (MDL) messages
•
Bit error rate testing
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Overview
Interoperability Guidelines for 6T3 Line Card DSUs
Interoperability Guidelines for 6T3 Line Card DSUs
The 6T3 line card supports several types of integrated data service units (DSUs). Table 1-1 lists the
feature compatibilities of 6T3 line card DSUs.
Table 1-1
Feature Compatibilities of 6T3 Line Card DSUs
DSU
Full Rate
Support
Scrambling
Support
Subrate
Support
MDL1 Support
Adtran
Yes
No
Yes
No
DL3100
Yes
Yes
Yes
No
Kentrox
Yes
Yes2
Yes2
No
Larscom
Yes
Yes
Yes
No
1. MDL (Maintenance Data Link)
2. The 6T3 line card supports scrambling and Kentrox subrate at the same time.
Maintenance Data Link Messages
T3 maintenance data link (MDL) messages are used to communicate identification information between
local and remote ports. The type of information included in MDL messages includes the equipment
identification code (EIC), location identification code (LIC), frame identification code (FIC), unit, Path
Facility Identification (PFI), port number, and Generator Identification numbers. The values for each
piece of MDL message identification can be defined only by a network administrator and are discussed
in ANSI T1.107.
For information on transporting MDL messages between source and destination T3 ports on a Cisco
7304 router, refer to T3 Maintenance Data Link Messages on the Cisco 7304 Router.
LEDs
The 6-port 6T3 line card has six LNK LEDs, one for each port, as well as one OIR LED and one
STATUS LED. (See Figure 1-2.)
Figure 1-2
LEDs on the 6T3 Line Card
7300-6T3
TX
RX
TX
RX
TX
RX
TX
RX
TX
RX
TX
RX
0
1
2
3
4
5
LNK
LNK
LNK
LNK
LNK
LNK
STATUS
66771
OIR
6-PORT T3 DSU
After system initialization, the STATUS LED goes on to indicate that power is received and that the
6T3 line card is enabled for operation.
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Chapter 1
Overview
T3 SMB Cables
The following conditions must all be met before the 6T3 line card is enabled:
•
The 6T3 line card is correctly connected and receiving power.
•
The Network Services Engine 100 (NSE-100) recognizes the 6T3 line card.
•
The Cisco IOS image on the NSE-100 is running.
If any one of these conditions is not met, or if the initialization fails, the STATUS LED does not go on.
Table 1-2 lists 6T3 line card LED colors and indications.
Table 1-2
6T3 Line Card LEDs
LED Label
Color
State
Meaning
OIR
Green
On
Line card is ready to be removed in
CLI-controlled OIR.
Off
Line card is online.
Green
Indicates line card is online.
Yellow
Indicates line card bootstrapping is in progress.
Off
Indicates line card is offline or deactivated.
Green
Line card port is enabled.
Yellow
Line card port is in loopback mode or is receiving
or transmitting alarms.
Off
Line card port is disabled.
STATUS
LNK
Green/Yellow
Green/Yellow
T3 SMB Cables
The cables used to connect the 6T3 line card are presented in the following sections:
•
Ordering Cables, page 1-6
•
Building Your Own Cables, page 1-6
We recommend using six T3 SMB cables. The cables are 10 feet (3.048 meters) long and have two
female SMB connectors on one end, and two female or male bayonet coupling (BNC) connectors on the
other end. Use the female SMB cable connectors to connect the local line card RX and TX ports. Use
the BNC cable connectors to connect the line card RX and TX ports to other devices. See Figure 3-2.
Note
Cisco does not automatically provide the six T3 SMB cables recommended for your 6T3
line card.
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Chapter 1
Overview
T3 SMB Cables
T3 SMB Cables (SMB Terminates into BNC)
70005
Figure 1-3
SMB connector
Note
Male BNC
connector
Female BNC
connector
Electromagnetic compliance (EMC) was verified with the 10-foot (3.048 meters) shielded cables that
are orderable through Cisco. We recommend that you use only the 10-foot (3.048 meters) shielded T3
SMB cables; otherwise, EMC is not guaranteed.
If you use cables other than those ordered from Cisco, it is your responsibility to ensure that you have a
compliant system that meets local EMC requirements. To order additional cables, use the product
numbers: 2CBLE-SMB-BNC-M (male) and 2CBLE-SMB-BNC-F (female).
Note
When you connect the 10-foot (3.048 meters) shielded T3 SMB cables to the 6T3 line card,
be careful not to bend the male cable connector pin when you connect or disconnect the
cables. Observe the receive (RX) and transmit (TX) cabling relationship shown in
Figure 1-4.
Figure 1-4
Connecting T3 SMB Cables
7300-6T3
TX
RX
TX
RX
TX
RX
TX
RX
TX
RX
TX
RX
0
1
2
3
4
5
LNK
LNK
LNK
LNK
LNK
LNK
STATUS
66771
OIR
6-PORT T3 DSU
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Chapter 1
Overview
T3 SMB Cables
After you connect the cables to a configured port on the line card, it takes up to 35 seconds to initialize
the line card and light the green LNK LED.
Ordering Cables
You must order cables separately with the 6T3 line card when you order a Cisco 7304 router. Cables are
not automatically included with the 6T3 line card. Be sure to specify the type of cable you want shipped
with your card (2CBLE-SMB-BNC-M [male] or 2CBLE-SMB-BNC-F [female]).
Building Your Own Cables
You can build your own cables for the 6T3 line card by using the cable components listed in Table 1-3.
All three cables have an SMB connector at one end to connect to the 6T3 line card. The two
SMB-to-BNC cables in Table 1-3 differ only in that one terminates in a male BNC connector, while the
other terminates in a female BNC connector. You can use the back-to-back cable for directly connecting
two closely-spaced 6T3 line cards back-to-back. These cables should be shielded and have SMB
connectors on both ends.
Note
Back-to-back configurations, (6T3 line card serial-to-6T3 line card serial port
configurations) require a specially built SMB-to-SMB cable. Table 1-3 provides cable
connector specifications. Or you can use the 2CBLE-SMB-BNC-M 10-foot (3.048 meters)
shielded cable and the 2CBLE-SMB-BNC-F 10-foot (3.048 meters) shielded cable
connected together.
You can order the SMB-to-BNC cables from Cisco as product numbers 2CBLE-SMB-BNC-F (female)
or 2CBLE-SMB-BNC-M (male) BNC terminations, respectively. Cisco does not sell the SMB-to-SMB
cable.
Table 1-3
Cable Connector Specifications
Cable Configuration
Line Card End
Remote End
RG-179 Cable
SMB-to-BNC Male
ITT-Cannon
051-124-9859-C9A
Radial R142076000
(or equivalent)
Amp 41360-4
(or equivalent)
Double-shielded
Harbour Ind. H6233-1
(or equivalent)
SMB-to-BNC Female
ITT-Cannon
051-124-9859-C9A
Amp 413760-8
(or equivalent)
Double-shielded
Harbour Ind. H6233-1
(or equivalent)
SMB-to-SMB
Back-to-Back
ITT-Cannon
051-124-9859-C9A
ITT-Cannon
051-124-9859-C9A
Double-shielded
Harbour Ind. H6233-1
(or equivalent)
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Management Information Base
Caution
Cisco assumes no responsibility for system operation with other than Cisco-supplied
adapter cables. The customer is responsible for ensuring that any customer-built cables
meet all of the applicable compliance requirements (see the “Related Documentation”
section on page viii).
T3 systems are designed for cable lengths of 450 feet (137 meters) between the transmitter and the
DSX-3 demarcation point where the standard pulse mask must be met. From the DSX-3 point, another
run of 450 feet (137 meters) is allowed to the receiver, making a total of 900 feet (274 meters) between
transmitter and receiver. This limitation is due to signal attenuation in the cable.
Although the American National Standards Institute (ANSI) standard T1.404-1994 stipulates the
Western Electric or equivalent 728A SMB cable, it has been replaced by the Lucent (formerly AT&T)
734A cable. Cisco tested more than 900 feet (274 meters) of 734A SMB cable from transmitter to
receiver including the SMB-to-BNC adapter cables to verify high signal attenuation.
Table 1-4 lists some approximate attenuation values from the ANSI standard, and shows the RG-179
attenuation. RG-179 has a much higher attenuation, so take this information into account if you plan long
runs of RG-179 cable.
Table 1-4
ANSI Standard Cable-Attenuation Values
Approximate Cable Attenuation, dB1 from ANSI Standard T1.404-1994
Frequency
100 ft (30 meters)
DSX-3 Point
Transmitter-to-receiver
distance (max)
RG-179
450 ft (137 meters)
900 ft (274 meters)
100 ft (30 meters)
1 MHz
0.27
1.2
2.4
3.0
10 MHz
0.80
3.6
7.2
5.3
50 MHz
1.82
8.2
16.4
8.5
100 MHz
2.64
11.9
23.8
10.0
1. dB = decibels
Management Information Base
Management Information Base (MIB) attributes are readable and writable across Integrated Local
Management Interface (ILMI) through use of the Simple Network Management Protocol (SNMP).
The 6-port 6T3 line card supports the DS3 interface MIB (RFC 1407).
Line Card Slot Locations on the Supported Platform
This section discusses line card slot locations on the supported platform. The illustration that follows
summarizes slot location conventions on the Cisco 7304 router:
•
Cisco 7304 Router Slot Numbering, page 1-8
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Chapter 1
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Line Card Slot Locations on the Supported Platform
Cisco 7304 Router Slot Numbering
Figure 1-5 shows a Cisco 7304 with the network services engine (NSE) installed in slots 0 and 1 and
line cards installed in slots 2 through 4. In the Cisco 7304, slot 0 is in the lower left position, and slot 5
is in the upper right position.
Figure 1-5
Slots in the Cisco 7304 Router
Slot 4
7300-6T3
OIR
TX
0
STATUS
6-PORT
T3 DSU
LNK
Slot 5
RX
TX
1
LNK
RX
TX
2
RX
TX
3
LNK
9K-10C
48
LNK
RX
TX
4
LNK
RX
TX
5
RX
LNK
TX
OIR
RX
STATUS
1-PORT
OC48 POS
9K-40C
3/POS
-MM
w/ SMS
R
OIR
STATUS
4-POR
T OC3
0
1
POS w/
2
3
MM
CARRIER
ALARM/
66944
ACTIVE/
LOOPBA
CK
Slot 0
Slot 2
Slot 3
Slot 1
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Identifying Interface Addresses
Identifying Interface Addresses
This section describes how to identify interface addresses for the 6T3 line card in the Cisco 7304 router.
Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the 6T3 line card installed in a router maintain the same address regardless of whether other
line cards are installed or removed. However, when you move a line card to a different slot, the first
number in the interface address changes to reflect the new slot number.
Table 1-5 explains how to identify interface addresses.
Table 1-5
Identifying Interface Addresses
Platform
Interface Address Format
Numbers
Syntax
Cisco 7304 router
Slot-number/interface-port-number
Slot—2 through 51
4/0
Interface port— 0 through 5)
1. Slot 0 and slot 1 are reserved for the dual-width network services engine (NSE).
Cisco 7304 Router Interface Addresses
This section describes how to identify the interface addresses used for the 6T3 line card in the
Cisco 7304 router. The interface address is composed of a two-part number in the format
slot-number/interface-port-number. See Table 1-5 for the interface address format.
In the Cisco 7304 router, slots are numbered from the lower left to the upper right, beginning with slot 0
and continuing through slot 5. (Slot 0 and slot 1 are reserved for the NSE.)
The interface address of the interfaces on a 6-port 6T3 line card in slot 2 are 2/0 through 2/5 (slot 2 and
interfaces 0 through 5). If the 6T3 line card was in slot 4, these same interfaces would be numbered 4/0
through 4/5 (slot 4 and interfaces 0 through 5).
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Overview
Identifying Interface Addresses
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C H A P T E R
2
Preparing for Installation
This chapter describes the general equipment, safety, and site preparation requirements for installing the
6T3 line card. This chapter contains the following sections:
•
Required Tools and Equipment, page 2-1
•
Software and Hardware Requirements, page 2-2
•
75-Ohm In-Line Coaxial Attenuator (Optional), page 2-2
•
Safety Guidelines, page 2-2
Required Tools and Equipment
You need the following tools and parts to install a line card. If you need additional equipment, contact
a service representative for ordering information.
•
6T3 line card
•
T3 SMB interface cables
•
Number 2 Phillips screwdriver
•
Your own electrostatic discharge (ESD)-prevention equipment or the disposable grounding wrist
strap included with all upgrade kits, field-replaceable units (FRUs), and spares
•
Antistatic mat
•
Antistatic container
•
Attenuator kit (optional)
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Chapter 2
Preparing for Installation
Software and Hardware Requirements
Software and Hardware Requirements
Table 2-1 lists the recommended minimum Cisco IOS software release required to use the 6-port 6T3
line card in the 7304 router platform.
Table 2-1
6T3 Line Card Software Requirements
Router Platform
Cisco 7304 Router
Recommended Minimum Cisco IOS Release
1
Cisco IOS Release 12.1(10)EX or a later release of Cisco IOS Release 12.1 EX
1. The 6T3 line card requires a Network Services Engine 100 (NSE-100) to operate.
75-Ohm In-Line Coaxial Attenuator (Optional)
A 75-ohm in-line coaxial attenuator may be required to tune the signal between the 6T3 line card and
the far-end equipment if the line card is experiencing line code violations (LCVs). LCVs occur when the
far-end equipment transmit signal saturates the front-end receiver of the 6T3 line card.
Cisco offers an attenuator kit (ATTEN-KIT-PA=) that contains five attenuators with fixed values
ranging from 3 dB to 20 dB. For more information on the attenuator kit, go to the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/core/7206/fru/12884att.htm
Safety Guidelines
This section provides safety guidelines that you should follow when working with any equipment that
connects to electrical power or telephone wiring.
Caution
The 6T3 line card is not intended for direct connection to outside telecommunication lines. If connected
to an outside telecommunication line, suitable protection devices need to be provided.
Safety Warnings
Safety warnings appear throughout this publication in procedures that, if performed incorrectly, might
harm you. A warning symbol precedes each warning statement.
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Safety Guidelines
Warning Definition
Warning
IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. To see translations of the warnings that appear in
this publication, refer to the translated safety warnings that accompanied this device.
Note: SAVE THESE INSTRUCTIONS
Note: This documentation is to be used in conjunction with the specific product installation guide
that shipped with the product. Please refer to the Installation Guide, Configuration Guide, or other
enclosed additional documentation for further details.
Waarschuwing
BELANGRIJKE VEILIGHEIDSINSTRUCTIES
Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan
veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij
elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard
praktijken om ongelukken te voorkomen. Voor een vertaling van de waarschuwingen die in deze
publicatie verschijnen, dient u de vertaalde veiligheidswaarschuwingen te raadplegen die bij dit
apparaat worden geleverd.
Opmerking BEWAAR DEZE INSTRUCTIES.
Opmerking Deze documentatie dient gebruikt te worden in combinatie met de
installatiehandleiding voor het specifieke product die bij het product wordt geleverd. Raadpleeg de
installatiehandleiding, configuratiehandleiding of andere verdere ingesloten documentatie voor
meer informatie.
Varoitus
TÄRKEITÄ TURVALLISUUTEEN LIITTYVIÄ OHJEITA
Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen
kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja
tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä asiakirjassa esitettyjen varoitusten
käännökset löydät laitteen mukana toimitetuista ohjeista.
Huomautus SÄILYTÄ NÄMÄ OHJEET
Huomautus Tämä asiakirja on tarkoitettu käytettäväksi yhdessä tuotteen mukana tulleen
asennusoppaan kanssa. Katso lisätietoja asennusoppaasta, kokoonpano-oppaasta ja muista
mukana toimitetuista asiakirjoista.
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Safety Guidelines
Attention
IMPORTANTES INFORMATIONS DE SÉCURITÉ
Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer
des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient
des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment
utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements
figurant dans cette publication, consultez les consignes de sécurité traduites qui accompagnent cet
appareil.
Remarque CONSERVEZ CES INFORMATIONS
Remarque Cette documentation doit être utilisée avec le guide spécifique d'installation du produit
qui accompagne ce dernier. Veuillez vous reporter au Guide d'installation, au Guide de
configuration, ou à toute autre documentation jointe pour de plus amples renseignements.
Warnung
WICHTIGE SICHERHEITSANWEISUNGEN
Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer
Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie
sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur
Vermeidung von Unfällen bewusst. Übersetzungen der in dieser Veröffentlichung enthaltenen
Warnhinweise sind im Lieferumfang des Geräts enthalten.
Hinweis BEWAHREN SIE DIESE SICHERHEITSANWEISUNGEN AUF
Hinweis Dieses Handbuch ist zum Gebrauch in Verbindung mit dem Installationshandbuch für Ihr
Gerät bestimmt, das dem Gerät beiliegt. Entnehmen Sie bitte alle weiteren Informationen dem
Handbuch (Installations- oder Konfigurationshandbuch o. Ä.) für Ihr spezifisches Gerät.
Figyelem!
FONTOS BIZTONSÁGI ELÕÍRÁSOK
Ez a figyelmezetõ jel veszélyre utal. Sérülésveszélyt rejtõ helyzetben van. Mielõtt bármely
berendezésen munkát végezte, legyen figyelemmel az elektromos áramkörök okozta kockázatokra,
és ismerkedjen meg a szokásos balesetvédelmi eljárásokkal. A kiadványban szereplõ
figyelmeztetések fordítása a készülékhez mellékelt biztonsági figyelmeztetések között található.
Megjegyzés ÕRIZZE MEG EZEKET AZ UTASÍTÁSOKAT!
Megjegyzés Ezt a dokumentációt a készülékhez mellékelt üzembe helyezési útmutatóval együtt kell
használni. További tudnivalók a mellékelt Üzembe helyezési útmutatóban (Installation Guide),
Konfigurációs útmutatóban (Configuration Guide) vagy más dokumentumban találhatók.
Avvertenza
IMPORTANTI ISTRUZIONI SULLA SICUREZZA
Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle
persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli
relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Per le
traduzioni delle avvertenze riportate in questo documento, vedere le avvertenze di sicurezza che
accompagnano questo dispositivo.
Nota CONSERVARE QUESTE ISTRUZIONI
Nota La presente documentazione va usata congiuntamente alla guida di installazione specifica
spedita con il prodotto. Per maggiori informazioni, consultare la Guida all'installazione, la Guida
alla configurazione o altra documentazione acclusa.
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Safety Guidelines
Advarsel
VIKTIGE SIKKERHETSINSTRUKSJONER
Dette varselssymbolet betyr fare. Du befinner deg i en situasjon som kan forårsake personskade.
Før du utfører arbeid med utstyret, bør du være oppmerksom på farene som er forbundet med
elektriske kretssystemer, og du bør være kjent med vanlig praksis for å unngå ulykker. For å se
oversettelser av advarslene i denne publikasjonen, se de oversatte sikkerhetsvarslene som følger
med denne enheten.
Merk TA VARE PÅ DISSE INSTRUKSJONENE
Merk Denne dokumentasjonen skal brukes i forbindelse med den spesifikke
installasjonsveiledningen som fulgte med produktet. Vennligst se installasjonsveiledningen,
konfigureringsveiledningen eller annen vedlagt tilleggsdokumentasjon for detaljer.
Aviso
INSTRUÇÕES IMPORTANTES DE SEGURANÇA
Este símbolo de aviso significa perigo. O utilizador encontra-se numa situação que poderá ser
causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha em
atenção os perigos envolvidos no manuseamento de circuitos eléctricos e familiarize-se com as
práticas habituais de prevenção de acidentes. Para ver traduções dos avisos incluídos nesta
publicação, consulte os avisos de segurança traduzidos que acompanham este dispositivo.
Nota GUARDE ESTAS INSTRUÇÕES
Nota Esta documentação destina-se a ser utilizada em conjunto com o manual de instalação
incluído com o produto específico. Consulte o manual de instalação, o manual de configuração ou
outra documentação adicional inclusa, para obter mais informações.
¡Advertencia!
INSTRUCCIONES IMPORTANTES DE SEGURIDAD
Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular
cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los
procedimientos estándar de prevención de accidentes. Vea las traducciones de las advertencias
que acompañan a este dispositivo.
Nota GUARDE ESTAS INSTRUCCIONES
Nota Esta documentación está pensada para ser utilizada con la guía de instalación del producto
que lo acompaña. Si necesita más detalles, consulte la Guía de instalación, la Guía de
configuración o cualquier documentación adicional adjunta.
Varning!
VIKTIGA SÄKERHETSANVISNINGAR
Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada.
Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och
känna till vanliga förfaranden för att förebygga olyckor. Se översättningarna av de
varningsmeddelanden som finns i denna publikation, och se de översatta säkerhetsvarningarna som
medföljer denna anordning.
OBS! SPARA DESSA ANVISNINGAR
OBS! Denna dokumentation ska användas i samband med den specifika
produktinstallationshandbok som medföljde produkten. Se installationshandboken,
konfigurationshandboken eller annan bifogad ytterligare dokumentation för närmare detaljer.
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Safety Guidelines
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Safety Guidelines
Electrical Equipment Guidelines
Follow these basic guidelines when working with any electrical equipment:
•
Before beginning any procedure requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
•
Disconnect all power and external cables before moving a chassis.
•
Do not work alone when potentially hazardous conditions exist.
•
Never assume that power has been disconnected from a circuit; always check.
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Safety Guidelines
•
Do not perform any action that creates a potential hazard to people or makes the equipment unsafe;
carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
Telephone Wiring Guidelines
Use the following guidelines when working with any equipment that is connected to telephone wiring
or to other network cabling:
•
Never install telephone wiring during a lightning storm.
•
Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
•
Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
•
Use caution when installing or modifying telephone lines.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. Line cards and processor modules
consist of printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)
shielding and connectors are integral components of the carrier. Although the metal carrier helps to
protect the board from ESD, use a preventive antistatic strap during handling.
Following are guidelines for preventing ESD damage:
Caution
•
Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
•
Connect the equipment end of the strap to an unfinished chassis surface.
•
When installing a component, use any available ejector levers or captive installation screws to
properly seat the bus connectors in the backplane or midplane. These devices prevent accidental
removal, provide proper grounding for the system, and help to ensure that bus connectors are
properly seated.
•
When removing a component, use any available ejector levers or captive installation screws to
release the bus connectors from the backplane or midplane.
•
Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
•
Place a removed board component-side-up on an antistatic surface or in a static shielding container.
If you plan to return the component to the factory, immediately place it in a static shielding
container.
•
Avoid contact between the printed circuit boards and clothing. The wrist strap protects components
from ESD voltages on the body only; ESD voltages on clothing can still cause damage.
•
Never attempt to remove the printed circuit board from the metal carrier.
For safety, periodically check the resistance value of the antistatic strap. The measurement should be
between 1 and 10 megohms (Mohms).
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C H A P T E R
3
Removing and Installing Line Cards
This chapter describes how to remove the 6T3 line card from supported platforms and also how to install
a new or replacement line card. This chapter contains the following sections:
•
Installation Overview, page 3-1
•
Handling Line Cards, page 3-2
•
Online Insertion and Removal, page 3-2
•
Warnings and Cautions, page 3-3
•
Line Card Removal and Installation, page 3-3
•
Connecting a T3 SMB Cable, page 3-5
Installation Overview
Each line card circuit board is mounted to a metal carrier and is sensitive to electrostatic discharge (ESD)
damage.
Note
When a line card slot is not in use, a blank line card must fill the empty slot to allow the router to conform
to electromagnetic interference (EMI) emissions requirements and to allow proper airflow across the line
cards. If you plan to install a new line card in a slot that is not in use, you must first remove the blank
line card.
Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration
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Chapter 3
Removing and Installing Line Cards
Handling Line Cards
Handling Line Cards
Caution
Always handle the line card by the carrier edges and handle; never touch the line card components or
connector pins. (See Figure 3-1.)
Figure 3-1
Handling a Line Card
70006
Printed circuit board
Metal carrier
GND
Online Insertion and Removal
The Cisco 7304 router supports online insertion and removal (OIR) of line cards; therefore, you do not
have to power down the router when removing and replacing a 6T3 line card on a Cisco 7304 router. The
Cisco 7304 router also supports CLI-controlled OIR (see the “CLI-Controlled OIR” section on
page 4-17), which allows for the completion of data traffic before the active interfaces are shut down.
Note
CLI-controlled OIR is the recommended way of performing OIR on this platform.
Note
As you disengage the line card from the router, online insertion and removal (OIR) administratively
shuts down all active interfaces on the line card.
Note
Before you begin installation, read Chapter 2, “Preparing for Installation,” for a list of parts and tools
required for installation.
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Removing and Installing Line Cards
Warnings and Cautions
Warnings and Cautions
Observe the following warnings and cautions when installing or removing line cards.
Caution
Do not slide a line card all the way into the slot until you have connected all required cables. Trying to
do so disrupts normal operation of the router or switch.
Note
If a line card lever or other retaining mechanism does not move to the locked position, the line card is
not completely seated in the backplane. Carefully pull the line card halfway out of the slot, reinsert it,
and move the line card levers to the locked position.
Caution
To prevent jamming the carrier between the upper and the lower edges of the line card slot, and to ensure
that the edge connector at the rear of the line card mates with the connection at the rear of the line card
slot, make certain that the carrier is positioned correctly, as shown in the cutaway in the following
illustrations.
Warning
When performing the following procedures, wear a grounding wrist strap to avoid ESD damage to the
card. Some platforms have an ESD connector for attaching the wrist strap. Do not directly touch the
midplane or backplane with your hand or any metal tool, or you could shock yourself.
Line Card Removal and Installation
In this section, the illustrations that follow give step-by-step instructions on how to remove and install
line cards. This section contains the following illustrations:
•
Cisco 7304—Removing and Installing a Line Card, page 3-4
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Chapter 3
Removing and Installing Line Cards
Line Card Removal and Installation
Cisco 7304—Removing and Installing a Line Card
1. To remove the line card, loosen the locking thumbscrews on both sides of the line card.
2. Pull out the line card levers and carefully slide the line card halfway out of the slot. If you are removing a
blank line card, pull the blank line card completely out of the chassis slot.
3. With the line card halfway out of the slot, disconnect all cables from the line card. After disconnecting the
cables, pull the line card out of the chassis slot.
4. To insert the line card, carefully align the edges of the carrier or printed circuit board between the upper
and the lower edges of the chassis slot.
5. Carefully slide the new line card halfway into the line card slot and connect all required cables.
6. With the cables connected, carefully slide the line card into the slot until the line card makes contact with
the backplane.
NOTE: The line card levers must be positioned at a 45-degree angle before the line card makes contact
with the backplane.
7. Push the line card levers in until the line card is fully seated in the router backplane.
NOTE: When the chassis is fully populated, seating a new line card may be difficult. In order to properly
seat the line card and avoid physical damage, loosen the thumbscrews on the neighboring line cards.
8. Tighten the locking thumbscrews on both sides of the line card.
57891
CAUTION: Use of excessive force to seat the line card may damage the router or line card.
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Connecting a T3 SMB Cable
Connecting a T3 SMB Cable
On a 6T3 line card, you can use six T3 SMB cables (one for each T3 link).
Each T3 link requires separate receive and transmit connections to your external T3 equipment.
To connect the T3 SMB cables to the 6T3 line card, follow these steps:
Step 1
Attach the T3 SMB cables directly to the SMB ports on the 6T3 line card. Attach the SMB ends of the
cable to the ports labeled TX and RX. (See Figure 3-2.)
Note
If you build your own cables, we strongly recommend that you fasten together your transmit and receive
cables along their entire length, as shown in Figure 3-2. Doing so reduces the effects of EMI. You can
use shielded jacketing or tubing for this purpose.
Figure 3-2
Attaching T3 SMB Cables to a 6T3 Line Card
7300-6T3
OIR
TX
0
STATUS
6-PORT
T3 DSU
LNK
RX
TX
1
LNK
RX
TX
2
LNK
To RX
RX
TX
3
LNK
RX
TX
4
LNK
RX
TX
5
RX
66946
LNK
To TX
Caution
Step 2
To prevent system problems and to maintain the proper cable connection sequences, connect the receive
and transmit ports on your 6T3 line card as indicated in Step 2.
Attach the BNC ends of your T3 SMB cables to your external T3 equipment as follows:
•
Attach the T3 cable from the 6T3 line card TX port to the RX port on your external T3 equipment.
•
Attach the T3 cable from the 6T3 line card RX port to the TX port on your external T3 equipment.
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Connecting a T3 SMB Cable
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C H A P T E R
4
Configuring the 6T3 Line Card
To continue your 6T3 line card installation, you must configure the serial interfaces.
This chapter contains the following sections:
•
Using the EXEC Command Interpreter, page 4-1
•
Configuring the Interfaces, page 4-2
•
Checking the Configuration, page 4-9
•
CLI-Controlled OIR, page 4-17
•
Line Card Crash Recovery, page 4-17
Using the EXEC Command Interpreter
You modify the configuration of your router through the software command interpreter called the EXEC
(also called enable mode). You must enter the privileged level of the EXEC command interpreter with
the enable command before you can use the configure command to configure a new interface or change
the existing configuration of an interface. The system prompts you for a password if one has been set.
The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket (>).
At the console terminal, use the following procedure to enter the privileged level:
Step 1
At the user-level EXEC prompt, enter the enable command. The EXEC prompts you for a
privileged-level password as follows:
Router> enable
Password:
Step 2
Enter the password (the password is case sensitive). For security purposes, the password is not displayed.
When you enter the correct password, the system displays the privileged-level system prompt (#):
Router#
To configure the new interfaces, proceed to the “Configuring the Interfaces” section on page 4-2.
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Configuring the Interfaces
Configuring the Interfaces
After you verify that the new 6T3 line card is installed correctly (the STATUS LED goes on), use the
privileged-level configure command to configure the new interfaces. Have the following information
available:
•
T3 information such as clock source and framing type
•
Protocols you plan to route on each new interface
•
IP addresses, if you plan to configure the interfaces for IP routing
•
Bridging protocols you plan to use
•
Timing source for each new interface
If you installed a new 6T3 line card or if you want to change the configuration of an existing interface,
you must enter configuration mode to configure the new interfaces. If you replaced a 6T3 line card that
was previously configured, the system recognizes the new interfaces and brings each of them up in their
existing configuration.
For a summary of the configuration options available and instructions for configuring interfaces on a
6T3 line card, refer to the appropriate configuration publications listed in the “Related Documentation”
section on page viii.
You execute configuration commands from the privileged level of the EXEC command interpreter,
which usually requires password access. Contact your system administrator, if necessary, to obtain
password access. (See the “Using the EXEC Command Interpreter” section on page 4-1 for an
explanation of the privileged level of the EXEC.)
This section contains the following subsections:
•
Shutting Down an Interface, page 4-2
•
Performing a Basic Configuration, page 4-4
•
Customizing the 6T3 Line Card Configuration, page 4-6
Shutting Down an Interface
Before you remove an interface that you will not replace, or replace line cards, use the shutdown
command to shut down (disable) the interfaces to prevent anomalies when you reinstall the new or
reconfigured interface processor. When you shut down an interface, it is designated administratively
down in the show command displays.
Follow these steps to shut down an interface:
Step 1
Enter the privileged level of the EXEC command interpreter (also called enable mode). (See the “Using
the EXEC Command Interpreter” section on page 4-1 for instructions.)
Step 2
At the privileged-level prompt, enter configuration mode and specify that the console terminal is the
source of the configuration subcommands, as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 3
Shut down interfaces by entering the interface serial subcommand (followed by the interface address
of the interface), and then enter the shutdown command. Table 4-1 shows the command syntax.
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When you have finished, press Ctrl-Z—hold down the Control key while you press Z—or enter end or
exit to exit configuration mode and return to the EXEC command interpreter.
Table 4-1
Syntax of the shutdown Command
Platform
Command
Example
Cisco 7304 routers
interface, followed by the type
The example is for interface 0 and interface 1 on a
(serial) and slot/port (slot-number/ 6T3 line card in slot 2.
interface-port-number)
Router(config-if)# interface serial 2/0
Router(config-if)# shutdown
Router(config-if)# interface serial 2/1
Router(config-if)# shutdown
Ctrl-Z
Router#
Note
Step 4
If you need to shut down additional interfaces, enter the interface serial command (followed by
the interface address of the interface) for each of the interfaces on your line card. Use the no
shutdown command to enable the interface.
Write the new configuration to NVRAM as follows:
Router# copy running-config startup-config
[OK]
Router#
The system displays an OK message when the configuration has been stored in NVRAM.
Step 5
Table 4-2
Verify that new interfaces are now in the correct state (shut down) using the
show interfaces command (followed by the interface type and interface address of the interface) to
display the specific interface. Table 4-2 provides examples.
Examples of the show interfaces serial Command
Platform
Command
Example
Cisco 7304 router
show interfaces serial, followed
by slot/port (slot-number/
interface-port-number)
The example is for interface 0 on a
6T3 line card in slot 2.
Router# show interfaces serial 2/0
Serial 2/0 is administratively down,
line protocol is down
[Additional display text omitted from
this example]
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Configuring the Interfaces
Step 6
Reenable interfaces by doing the following:
a.
Repeat Step 3 to reenable an interface. Substitute the no shutdown command for the shutdown
command.
b.
Repeat Step 4 to write the new configuration to memory.
Use the copy running-config startup-config command.
c.
Repeat Step 5 to verify that the interfaces are in the correct state. Use the
show interfaces command followed by the interface type and interface address of the interface.
For complete descriptions of software configuration commands, refer to the publications listed in the
“Related Documentation” section on page viii.
Performing a Basic Configuration
Following are instructions for a basic configuration: enabling an interface and specifying IP routing.
You might also need to enter other configuration subcommands, depending on the requirements for your
system configuration and the protocols you plan to route on the interface. For complete descriptions of
configuration subcommands and the configuration options available for serial interfaces, refer to the
appropriate software documentation.
In the following procedure, press the Return key after each step unless otherwise noted. At any time
you can exit the privileged level and return to the user level by entering disable at the prompt as follows:
Router# disable
Router>
Step 1
Enter configuration mode and specify that the console terminal is the source of the configuration
subcommands, as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 2
Table 4-3
Specify the first interface to configure by entering the interface serial subcommand, followed by the
interface address of the interface you plan to configure. Table 4-3 provides an example.
Examples of the interface serial Subcommand
Platform
Command
Example
Cisco 7304 router
interface serial, followed by
slot/port (slot-number/
interface-port-number)
The example is for the first interface of a
6T3 line card in slot 4.
Step 3
Router(config)# interface serial 4/0
Router(config-if)#
Assign an IP address and subnet mask to the interface (if IP routing is enabled on the system) by using
the ip address subcommand, as in the following example:
Router(config-if)# ip address 10.0.0.0 10.255.255.255
Step 4
Add any additional configuration subcommands required to enable routing protocols and set the
interface characteristics.
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Step 5
Reenable the interfaces using the no shutdown command. (See the “Shutting Down an Interface”
section on page 4-2.)
Step 6
Configure all additional line card interfaces as required.
Step 7
After including all of the configuration subcommands to complete your configuration, press
Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode
and return to the EXEC command interpreter prompt.
Step 8
Write the new configuration to NVRAM as follows
Router# copy running-config startupup-config
[OK]
Router#
This completes the procedure for creating a basic configuration.
Table 4-4 shows the default values for the 6T3 line card serial interfaces.
Table 4-4
6T3 Line Card Serial Interface Default Values
Parameter
Configuration Command
Default Value
Clock source
clock source [internal | line]
line
Cyclic redundancy check
crc [16 | 32]
16
DSU mode
[no] dsu mode [adtran | cisco | digital-link | kentrox|
larscom]
cisco
DSU subrate bandwidth
[no] dsu bandwidth kbps
44210
Encapsulation
encapsulation [hdlc | ppp]
hdlc
Far-end DSU bandwidth
[no] dsu remote fullrate
subrate
Framing mode
[no] framing [c-bit | m23]
c-bit
Idle character mode
[no] idle-character [flags | marks]
flags
Invert data
[no] invert data
No invert data
Keepalive
[no] keepalive [seconds]
keepalive 10
Loopback mode
[no] loopback [local | network line | network payload no loopback
| remote | dte]
Maximum transmission
unit
[no] mtu bytes
4470 bytes
Payload scrambling
[no] scramble
no scramble
Remote requests
[no] dsu remote accept
accept
Transmitter delay
[no] transmitter-delay # of idle characters
0–255
Cable length
cable length {0–450}
50
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Configuring the Interfaces
Customizing the 6T3 Line Card Configuration
There are two sides to the network, a local network side and a remote customer side, or near and far ends.
The 6T3 line card supports third-party data service units (DSUs), Internet Service Provider
(ISP)-provided DS3 lines, and so on. You can change the configuration parameter default values in the
6T3 line card port interfaces to match the remote DSUs on your network. Table 4-5 shows the
configuration parameters.
Table 4-5
6T3 Line Card Serial Interface DSU Modes
Default
Value
Command
[no] dsu mode [adtran | cisco |
digital-link | kentrox| larscom]
cisco
Router(config-if)# dsu mode cisco
DSU subrate bandwidth
[no] dsu bandwidth kbps
44210
Router(config-if)# dsu bandwidth
44210
Far-end DSU bandwidth
[no] dsu remote fullrate
subrate
Router(config-if)# dsu remote
fullrate
Payload scrambling
[no] scramble1
no
scramble
Router(config-if)# scramble
Remote requests
[no] dsu remote accept
accept
Router(config-if)# dsu remote
accept
Cyclic redundancy check
crc [16 | 32]
16
Router(config-if)# crc 16
Parameter
Configuration Command
DSU mode
1. Adtran DSU mode does not support payload scrambling.
Note
The local port and the remote port must have matching configuration.
Verifying Local and Remote DS3 Port Settings
You can use telnet to determine the DSU mode settings on the remote DS3 port. Once you verify the
remote DS3 port settings, you can negotiate changing configuration parameters so that DSU mode
settings are the same on both the local and remote DS3 ports. You can set the DSU bandwidth to accept
or reject the incoming remote requests from the local DS3 port by entering the dsu remote accept
interface configuration command.
Selecting a DSU Mode
The DSU mode supports several third-party DSU vendors—Adtran, Digital Link, Kentrox, and
Larscom—and the default DSU mode, Cisco. If you use a DSU to make the connection between the
Cisco 7304 router and another device, the local DS3 port configuration must match the remote DS3 port
configuration. Therefore, if the remote DS3 port uses the Kentrox vendor, a request is sent to the local
DS3 port to change the DSU mode to Kentrox, either by manually entering the dsu mode configuration
command and specifying the Kentrox DSU or by using the Cisco Remote Connection Management
(CRCM) feature to remotely configure the remote DS3 port. If you make a direct connection between a
Cisco 7304 router and another device, you can use the Cisco DSU mode.
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Setting the Sending and Receiving Rate
The local and remote DS3 ports must also agree on whether to use a subrate or fullrate sending and
receiving rate, because the speed of the sending and receiving rate is regulated by the DSU mode. If the
sending and receiving rates do not match, they will not work. Subrates are specific to DSU modes and
must be configured appropriately. The subrate sending and receiving rate is slower and less expensive
than the faster, more expensive, fullrate. You can synchronize the local and remote DS3 ports sending
and receiving rates by entering the dsu remote interface configuration command.
Configuring the DSU Bandwidth Range
The DSU bandwidth range is from 0 to 44210 kbps. The local port and the remote port must have
matching configuration. Therefore, if you reduce the effective bandwidth to 3000 on the local port, you
must do the same on the remote port by entering the dsu bandwidth interface configuration command.
In interface configuration mode, reduce effective bandwidth (range of 0 to 44210 kbps) by entering the
dsu bandwidth configuration subcommand, as in the following example:
Router(config-if)# dsu bandwidth 3000
Use the no form of this command to return to the default, 44210.
Note
The local port configuration must match the remote port configuration.
Enabling Payload Scrambling
Payload (data) scrambling converts the data received by the local or remote DS3 ports from the Digital
Link, Kentrox, and Larscom third-party DSU vendor modes as well as the default, Cisco mode. The
Adtran DSU mode does not support payload scrambling.
To enable payload scrambling on the local and remote DS3 ports, you must enter the scramble interface
configuration command. If you do not enter the scramble command, payload scrambling remains
disabled by default on the local and remote DS3 ports.
Configuring Cyclic Redundancy Checks
Table 4-6 summarizes cyclic redundancy check (CRC) commands. For more information, see the
remainder of this section.
Table 4-6
CRC Commands
Purpose
Command
Example
Further Information
Enable 32-bit CRC.
crc size
The example enables 32-bit CRC on a serial
interface:
“Selecting a DSU Mode”
Router(config)# interface serial 3/0
Router(config-if)# crc 32
Return to default
16-bit CRC.
no crc size
The example disables 32-bit CRC on a serial
interface and returns to the default 16-bit
CRC:
“Selecting a DSU Mode”
Router(config)# interface serial 3/0
Router(config-if)# no crc 32
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Configuring the Interfaces
CRC is an error-checking technique that uses a calculated numeric value to detect errors in transmitted
data. All interfaces use a 16-bit CRC (CRC-CITT) by default but also support a 32-bit CRC. The sender
of a data frame calculates the frame check sequence (FCS). Before it sends a frame, the sender appends
the FCS value to the message. The receiver recalculates the FCS and compares its calculation to the FCS
from the sender. If there is a difference between the two calculations, the receiver assumes that a
transmission error occurred and sends a request to the sender to resend the frame.
Enable 32-bit CRC using the crc 32 command. Before you can enable 32-bit CRC, you must use the
interface serial command (followed by the interface address of the interface) to select the interface on
which you want to enable 32-bit CRC. This command functions in the same way on all supported
platforms.
In the example that follows, 32-bit CRC is specified:
Router(config-if)# crc 32
The preceding command example applies to all systems in which the 6T3 line card is supported.
Use the no crc 32 command to disable CRC-32 and return the interface to the default CRC-16
(CRC-CITT) setting.
When you have finished, press Ctrl-Z—hold down the Control key while you press Z—or enter end or
exit to exit configuration mode and return to the EXEC command interpreter prompt. Then write the new
configuration to NVRAM using the copy running-config startup-config command.
Note
When enabling a 16-bit or 32-bit CRC on a local interface, ensure that the remote device
is also configured for a 16-bit or 32-bit CRC.
For command descriptions, refer to the Configuration Fundamentals Configuration Guide publication.
For more information, see the “Obtaining Documentation” section on page viii and the “Obtaining
Technical Assistance” section on page x.
Configuring the Clock Source
The only exception for matching local and remote DS3 port configurations is that the clock sources must
be set opposite each other. Therefore, if you enter the clock source internal command for the local DS3
port, you must enter clock source line for the remote DS3 port.
Defining the DSU Mode
In interface configuration mode, define the DSU interoperability mode by entering the
dsu mode [adtran | [cisco | digital-link | kentrox | larscom ] configuration subcommand, as in the
following example:
Router(config-if)# dsu mode cisco
Use the no form of this command to return to the default, 0.
Note
The local port configuration must match the remote port configuration. For example, if you define the
DSU interoperability mode as cisco on the local port, you must do the same on the remote port. You need
to know what type of DSU is at the remote port to find out if it interoperates with the 6T3 line card. For
T3 serial interfaces, specify cisco for connection from a 6T3 line card to another 6T3 line card. Specify
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Checking the Configuration
adtran for connection from a 6T3 line card to an Adtran DSU. Specify digital-link for connection to a
Digital Link DSU (DL3100). Specify kentrox for connection from a 6T3 line card to a Kentrox DSU.
Specify larscom for connection from a 6T3 line card to a Larscom DSU.
Also see the “Interoperability Guidelines for 6T3 Line Card DSUs” section on page 1-3 for information
regarding DSU feature compatibilities.
Enabling T3 Scrambling
In interface configuration mode, enable T3 scrambling by entering the scramble configuration
subcommand, as in the following example:
Router(config-if)# scramble
Use the no form of this command to restore the default value, disabled.
Note
The local port configuration must match the remote port configuration. For example, if you enable
scrambling on the local port, you must do the same on the remote port.
Also see the “Interoperability Guidelines for 6T3 Line Card DSUs” section on page 1-3 for information
regarding DSU feature compatibilities.
Specifying T3 Framing
In interface configuration mode, specify T3 framing by entering the framing {c-bit | m23}
configuration subcommand, as in the following example:
Router(config-if)# framing c-bit
Use the no form of this command to return to the default, C-bit framing.
Setting the Cable Length
In interface configuration mode, set the cable length (0 to 450 feet), as in the following example:
Router(config-if)# cablelength 250
Use the no form of this command to return to the default, which is 50 feet.
Checking the Configuration
After configuring the new interface, use the show commands to display the status of the new interface
or all interfaces, and use the ping and loopback commands to check connectivity. This section includes
the following subsections:
•
Using show Commands to Verify the New Interface Status, page 4-10
•
DS3 Alarm and Event Detection, page 4-14
•
Using the ping Command to Verify Network Connectivity, page 4-15
•
Using loopback Commands, page 4-15
•
Bit Error Rate Testing, page 4-17
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Checking the Configuration
Using show Commands to Verify the New Interface Status
Table 4-7 demonstrates how you can use the show commands to verify that new interfaces are
configured and operating correctly and that the 6T3 line card appears in them correctly. Sample displays
of the output of selected show commands appear in the sections that follow. For complete command
descriptions and examples, refer to the publications listed in the “Related Documentation” section on
page viii.
Note
Table 4-7
The outputs that appear in this document may not match the output you receive when running these
commands. The outputs in this document are examples only.
Using show Commands
Command
Function
Example
show version or
show hardware
Displays system hardware
configuration, the number of
each interface type installed,
Cisco IOS software version,
names and sources of
configuration files, and boot
images
Router# show version
show controllers
Displays all the current interface
processors and their interfaces
Router# show controllers
show diag slot
Displays types of line cards
installed in your system and
information about a specific
chassis slot
Router# show diag 2
show interfaces type slot-number/
interface-port-number
Displays status information
about a specific type of interface
(for example, serial) in a
Cisco 7304 router
Router# show interfaces serial 2/0
show protocols
Displays protocols configured
for the entire system and for
specific interfaces
Router# show protocols
show running-config
Displays the running
configuration file
Router# show running-config
show startup-config
Displays the configuration
stored in NVRAM
Router# show startup-config
If an interface is shut down and you configured it as up, or if the displays indicate that the hardware is
not functioning properly, ensure that the interface is properly connected and terminated. If you still have
problems bringing up the interface, contact a service representative for assistance. This section includes
the following subsections:
•
Using the show version or show hardware Commands, page 4-11
•
Using the show diag Command, page 4-12
•
Using the show interfaces Command, page 4-13
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Choose the subsection appropriate for your system. Proceed to the “Using the ping Command to Verify
Network Connectivity” section on page 4-15 when you have finished using the show commands.
Using the show version or show hardware Commands
Display the configuration of the system hardware, the number of each interface type installed, the Cisco
IOS software version, the names and sources of configuration files, and the boot images by using the
show version (or show hardware) command.
Note
The outputs that appear in this document may not match the output you receive when running these
commands. The outputs in this document are examples only.
Cisco 7304 Routers
Following is an example of the show version command from a Cisco 7304 router with the 6T3 line card:
Router# show version
Cisco Internetwork Operating System Software
IOS (tm) 7300 Software (C7300-JS-M), Version 12.1(1.23.139), CISCO DEVELOPMENT VERSION
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Thu 20-Dec-01 03:25 by cva
Image text-base:0x40008970, data-base:0x41796000
ROM:System Bootstrap, Version 12.1(20011026:021245) [hih-rommon_1_1 101], DEVELOPMENT
SOFTWARE
Currently running ROMMON from ROM 1
BOOTLDR:7300 Software (C7300-BOOT-M), Version 12.1(1.23.87), CISCO DEVELOPMENT VERSION
nag-ws1 uptime is 10 minutes
System returned to ROM by reload
System image file is "disk0:c7300-js-mz.121-10.EX"
cisco 7300 (NSE100) processor (revision A) with 114688K/16384K bytes of memory.
Processor board ID
R7000 CPU at 350Mhz, Implementation 39, Rev 3.2, 256KB L2, 1024KB L3 Cache
4 slot midplane, Version 65.48
Last reset from software reset or reload
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
PXF processor tmc0 running 'system:pxf/ucode1' v1.4 is active
PXF processor tmc1 running 'system:pxf/ucode1' v1.4 is active
1 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)
6 Serial network interface(s)
509K bytes of non-volatile configuration memory.
16064K bytes of ATA compact flash in bootdisk (Sector size 512 bytes).
31360K bytes of ATA compact flash in disk0 (Sector size 512 bytes).
Configuration register is 0x0
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Configuring the 6T3 Line Card
Checking the Configuration
Using the show diag Command
Display the types of line cards installed in your system (and specific information about each) using the
show diag slot command.
Note
The outputs that appear in this document may not match the output you receive when running these
commands. The outputs in this document are examples only.
Cisco 7304 Routers
Following is an example of the show diag slot command that shows the 6T3 line card in slot 5 of a Cisco
7304 router:
Router# show diag 5
Slot 5:
T3 Line Card, 6 ports
Line Card state:Active
Insertion time:00:02:10 ago
Bandwidth points:30
EEPROM contents at hardware discovery:
Hardware Revision
:2.1
Unknown Field (type 0046):00 00
PCB Serial Number
:CAB0541KUZ4
Part Number
:73-5938-02
Board Revision
:A0
Fab Version
:02
RMA Test History
:00
RMA Number
:0-0-0-0
RMA History
:00
Deviation Number
:0-0
Product Number
:7300-6T3
Top Assy. Part Number
:68-0000-00
Manufacturing Test Data :00 00 00 00 00 00 00 00
Field Diagnostics Data
:00 00 00 00 00 00 00 00
Calibration Data
:Minimum:0 dBmV, Maximum:0
Calibration values :
EEPROM format version 4
EEPROM contents (hex):
0x00:04 FF 40 02 E8 41 02 01 46 00 00 C1 8B 43 41
0x10:30 35 34 31 4B 55 5A 34 82 49 17 32 02 42 41
0x20:02 02 03 00 81 00 00 00 00 04 00 80 00 00 00
0x30:CB 94 37 33 30 30 2D 36 54 33 20 20 20 20 20
0x40:20 20 20 20 20 20 87 44 00 00 00 C4 08 00 00
0x50:00 00 00 00 00 C5 08 00 00 00 00 00 00 00 00
0x60:09 00 00 00 00 00 00 00 00 00 C7 7C F6 44 3F
0x70:00 00 00 00 00 00 00 00 00 00 00 00 07 08 64
0x80:28 37 26 09 C4 64 32 28 32 DD 0C E4 64 32 28
0x90:24 2E E0 AA 82 64 F4 24 00 00 00 00 00 00 00
0xA0:00 00 00 00 00 00 F4 C8 FF FF FF FF FF FF FF
0xB0:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xC0:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xD0:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xE0:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xF0:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
This linecard has not crashed since its insertion
dBmV
42
30
00
20
00
C8
30
32
43
00
FF
FF
FF
FF
FF
FF
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Configuring the 6T3 Line Card
Checking the Configuration
Using the show interfaces Command
The show interfaces command displays status information (including the physical slot and interface
address) for the interfaces you specify. The example that follows specifies serial interfaces.
Note
The outputs that appear in this document may not match the output you receive when running these
commands. The outputs in this document are examples only.
Cisco 7304 Routers
Following is an example of the show interfaces command for Cisco 7304 routers. In this example, the
serial interfaces (0 to 5) are on a 6T3 line card in slot 5; also, the status information for interfaces 1
through 5 is omitted. (Interfaces are administratively shut down until you enable them.)
Router# show interfaces serial 5/0
Serial5/0 is up, line protocol is up
Hardware is Packet over DS3
Internet address is 50.1.1.2/8
MTU 9216 bytes, BW 44210 Kbit, DLY 200 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive not set
Scramble enabled
Last input 15:00:13, output 15:00:13, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
5 packets input, 520 bytes, 0 no buffer
Received 0 broadcasts, 101 runts, 0 giants, 0 throttles
0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun,, 42 abort
5 packets output, 520 bytes, 0 underruns
0 output errors, 0 applique, 4 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
[Additional display text omitted from this example]
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Configuring the 6T3 Line Card
Checking the Configuration
DS3 Alarm and Event Detection
This section assumes that you are familiar with DS3 alarms and line states. The 6T3 line card does not
have an LED for alarm and event detection. However, you can enter the show controllers serial
slot/port EXEC command to verify whether the alarm and event detection messages are active or
inactive. Most alarm and event detection messages are short-lived, because if problems occur, the line
card clears the error condition, but records the event to verify line card operation status.
The output from the show controllers serial slot/port EXEC command sends messages about the
following types of alarms and events:
•
AIS (Alarm Indication Signal)
•
LOF (Loss of Frame)
•
LOS (Loss of Signal)
•
OOF (Out of Frame)
•
RAI (Remote Alarm Indication)
Cisco 7304 Routers
The output also indicates whether the alarm or event originates from the local end connector or the
remote end connector, as shown in the following example:
Router# show controllers serial 5/0
Interface Serial5/0 (DS3 port 0)
Line state is up
rxLOS inactive, rxLOF inactive, rxAIS inactive
txAIS inactive, rxRAI inactive, txRAI inactive
Current configurable parameter settings:
Loopback is none, Framing is c-bit
Clock source is internal, Cable length is 50
DSU mode is cisco, DSU bandwidth limit is 44210
Payload scrambling is disabled, CRC is 16
Transmitter delay is 0, Encapsulation is HDLC
Idle character is flags, Invert data is disabled
Remote fullrate has no request outstanding
Remote accept is enabled, MTU is 9216
MIB information:
Data in current interval (127 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violations
0 C-bit Coding Violations
0 P-bit Err Secs, 0 P-bit Sev Err Secs
0 Sev Err Framing Secs, 8 Unavailable Secs
0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
No alarms detected.
0 AIS, 1 LOF, 2 RAI, 118 FEBE
Last FEAC code received:AIS
Interface 5/0 counters:
Total input packets = 0, bytes = 0, drops = 0
Total output packets = 0, bytes = 0, drops = 0
PXF i/f number = 0x1E
PXF Hdr lo = 0x300001E, PXF Hdr hi = 0x30000000
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Configuring the 6T3 Line Card
Checking the Configuration
Using the ping Command to Verify Network Connectivity
Using the ping command, you can verify that an interface port is functioning properly. This section
provides a brief description of this command. Refer to the publications listed in the “Related
Documentation” section on page viii for detailed command descriptions and examples.
The ping command sends echo request packets out to a remote device at an IP address that you specify.
After sending an echo request, the system waits a specified time for the remote device to reply. Each
echo reply is displayed as an exclamation point (!) on the console terminal; each request that is not
returned before the specified timeout is displayed as a period (.). A series of exclamation points (!!!!!)
indicates a good connection; a series of periods (.....) or the messages [timed out] or [failed] indicate a
bad connection.
Following is an example of a successful ping command to a remote server with the address 10.0.0.10:
Router# ping 10.0.0.10 <Return>
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 10.0.0.10, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 ms
Router#
If the connection fails, verify that you have the correct IP address for the destination and that the device
is active (powered on), and repeat the ping command.
Proceed to the next section, “Using loopback Commands,” to finish checking network connectivity.
Using loopback Commands
With the loopback test, you can detect and isolate equipment malfunctions by testing the connection
between the 6T3 line card interface and a remote device such as a modem or a CSU/DSU. The loopback
command places an interface in loopback mode, which enables test packets that are generated from the
ping command to loop through a remote device or compact serial cable. If the packets complete the loop,
the connection is good. If not, you can isolate a fault to the remote device or compact serial cable in the
path of the loopback test.
Table 4-8 provides examples of the loopback {dte | local | network {line | payload} | remote}
command. The examples given are for interface 0 of a 6T3 line card in slot 2 of a Cisco 7304 router:
Table 4-8
Using loopback Commands
Command
Function
Example
loopback local
Sets the interface into local loopback
mode. Local loopback loops the router
output data back toward the router at the
framer.
Router(config)# interface serial 2/0
Router(config-if)# loopback local
loopback network line
Sets the interface into network line
loopback mode. Network line loopback
loops the data back toward the network
(before the framer).
Router(config)# interface serial 2/0
Router(config-if)# loopback network
line
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Configuring the 6T3 Line Card
Checking the Configuration
Table 4-8
Using loopback Commands (continued)
Command
Function
Example
loopback network payload
Sets the interface into network payload
loopback mode. Network payload
loopback loops just the payload data back
toward the network at the T3 framer.
Router(config)# interface serial 2/0
Router(config-if)# loopback network
payload
loopback remote1
Sets the interface into remote loopback
mode. Remote loopback loops the data
back toward the network (before the
framer at the remote T3 device).
Router(config)# interface serial 2/0
Router(config-if)# loopback remote
loopback dte
Sets the interface into loopback data
terminal equipment (DTE). Loopback
DTE loops the router output data back
toward the router (after the LIU).
Router(config)# interface serial 2/0
Router(config-if)# loopback dte
1. Remote loopback mode works with C-bit framing only. The other loopback modes listed above work with C-bit and M23 framing. Refer to the
“Specifying T3 Framing” section on page 4-9 for information on configuring C-bit framing.
Figure 4-1 shows the data flow for three loopback configuration paths, including no loopback.
DS3 Loopback Paths
Tx DS3 framer
LIU
Rx DS3 framer
QJET
Tx/Rx
HDLC
Tx DS3 framer
LIU
Rx DS3 framer
QJET
Diagnostic or local loopback
No loopbacks
Tx DS3 framer
LIU
Rx DS3 framer
QJET
Tx/Rx
HDLC
Tx DS3 framer
LIU
Rx DS3 framer
QJET
Line loopback
Remote
host
Cable
Tx/Rx
HDLC
Payload loopback
Tx DS3 framer
Tx DS3 framer
LIU
LIU
Tx/Rx
HDLC
QJET
Rx DS3 framer
Remote loopback
Rx DS3 framer
QJET
Tx/Rx
HDLC
DTE loopback
0695
Figure 4-1
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Configuring the 6T3 Line Card
CLI-Controlled OIR
Bit Error Rate Testing
The ratio of received bits on an interface that contain errors is called the bit error rate (BER). A bit error
rate test (BERT) is used to check the BER. T3 bit error rate testing is used on the Cisco 7304 router to
check communication between local and remote DS3 ports. If traffic is not being transmitted or received
on a DS3 port, or if the quality of the line simply needs to be tested, T3 bit error rate testing can be used
to test the port.
For information on performing bit error rate testing, refer to T3 Bit Error Rate Testing on the Cisco 7304
Router.
CLI-Controlled OIR
Line cards can be removed from the Cisco 7304 router without disrupting data flow by using the
hw-module slot slot # stop/start command in EXEC mode. The hw-module slot slot # stop command
will stop traffic, shut down all line card interfaces, and deactivate the line card. The hw-module slot slot
# start command resets the line card, puts the line card back online and turns off the OIR LED.
Note
Upon insertion of a line card, the system will automatically activate the card. The hw-module slot slot
# start command is only necessary when reactivating an installed line card that has been deactivated
with the hw-module slot slot # stop command.
To remove and install an active line card in slot 2 proceed as follows:
Router# hw-module slot 2 stop
When the OIR LED turns green, the line card in slot 2 has been deactivated and can be physically
removed and replaced with a new line card (see the “Line Card Removal and Installation” section on
page 3-3.)
When the new line card is inserted in slot 2 it is automatically reset, put online, and the OIR LED is
turned off.
Line Card Crash Recovery
The 6T3 line card automatically recovers from the following catastrophic errors:
•
Fatal serial link errors
•
Line card local processor firmware crash
•
Loss of keepalive packets from line card local processor
•
Hardware errors reported by line card devices
•
Too many line card error interrupts (more than 60 interrupts within 10 processor ticks)
If the 6T3 line card encounters more than five fatal errors within one hour, recovery will not be attempted
and the line card will be deactivated. To reactivate the line card use the hw-module slot slot # start
command, or physically remove and replace the line card.
The 6T3 line card crash history may be viewed by using the show diag slot command. The crash history
is saved as long as the line card is physically present in the chassis. Physically removing the
6T3 line card from the chassis or performing a CLI-controlled OIR will clear the crash history.
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Configuring the 6T3 Line Card
Line Card Crash Recovery
The following messages are associated with line card recovery:
Error Message 00:00:06:% LC-3-RECOVERY: Line card (slot <x>) recovery in progress
Error Message 00:00:06:% LC-3-EXCESSERRORS: Noof errors seen on the line card
(slot <x>) exceed the threshold
When the 6T3 line card encounters any of the non-recoverable errors listed below, the line card is
deactivated and must be restarted by performing a CLI-controlled OIR or physically removing and
installing the line card.
•
Line card hardware failures
•
Line card local processor boot code/firmware initialization failure (failure to boot or boot code
exceptions, firmware download failure)
•
Environmental critical conditions (voltage and temperature)
•
Insufficient system memory to allocate critical line card driver data structures during line card
initialization
The following examples show non recoverable fatal error messages:
Error Message 00:00:06% SERIAL-0-DLL_OUTOFLOCK: T3 HW DLLS failed to lock in line
card at slot <x>
Error Message 00:00:06% SERIAL-0-860_BOOT_NOTOK: T3 Line card local processor at
slot <x> failed to boot
Error Message 00:00:06% SERIAL-3-FW_CHECKSUM_FAILED: T3 line card in slot <x>,
firmware integrity check failed (section <x>, expected checksum: <x>, calculated
checksum: <x>)
Error Message 00:00:06% ENVM-0-SHUTDOWN: Environmental Monitor initiated shutdown
due to <voltage/temperature/power supply> in slot <x>
Error Message 00:00:06% SERIAL-1-ALLOCFAIL: T3 (slot <x>) line card plugin structure
allocation failure
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