Cisco 2975 - Catalyst LAN Base Switch Specifications

Cisco 2975 - Catalyst LAN Base Switch Specifications
Data Sheet
Cisco Catalyst 2975 Switch with LAN Base Software
Cisco Catalyst 2975 Switch with LAN Base software is a fixed-configuration stackable
intelligent Ethernet switch with Power over Ethernet (PoE) and Gigabit Ethernet
connectivity, enabling enhanced LAN services for commercial branch office networks (see
Figure 1). The Cisco Catalyst 2975 LAN Base Switch offers integrated security, including
Network Admission Control (NAC), enhanced quality of service (QoS), and resiliency to
deliver intelligent services for the network edge.
The Cisco Catalyst 2975 LAN Base Switch offers:
Gigabit Ethernet and PoE connectivity
High-speed stacking for up to nine switches in a stack
Unified stack management to simplify management of the network access layer
Auto software image and configuration provisioning for plug-and-play hardware
Network control and bandwidth optimization using QoS shaping, granular rate limiting,
traffic classification, sophisticated access control lists (ACLs), and multicast services
NAC through a wide range of authentication methods and support for the Cisco Catalyst
Integrated Security Framework
Based on common Cisco IOS Software with support for Auto QoS and Smartports to
enable consistent end-to-end services across network
Easy network configuration and troubleshooting using Cisco Network Assistant software
Limited lifetime hardware warranty
Software updates at no additional charge
Figure 1.
Cisco Catalyst 2975 LAN Base Switch
The Cisco Catalyst 2975 LAN Base software image is a rich suite of intelligent services, including
enhanced QoS, rate limiting, ACLs, and IPv6 management. The Small Form-Factor Pluggable
(SFP)-based Gigabit Ethernet ports accommodate a range of SFP transceivers, including the
Cisco 1000BASE-SX, 1000BASE-LX, 1000BASE-BX, 1000BASE-ZX, 100BASE-FX, and coarse
wavelength-division multiplexing (CWDM) SFP transceivers.
Unified Stack Management
The Cisco Catalyst 2975 Switch supports unified stack management to reduce the operational cost
of managing a stack of up to nine access layer switches. The Cisco Catalyst 2975 Switch supports
32 Gbps stacking bandwidth with dedicated stacking ports and special stacking cables. A master
switch and backup master switch are elected within a stack of Cisco Catalyst 2975 Switches. The
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Data Sheet
master switch maintains a single configuration file for the stack and automatically provisions and
updates the software image for new switches added to a stack, enabling plug-and-play hardware
replacement. The Cisco Catalyst 2975 Switch stack supports a single IP address, which is
maintained even when a new stack master is elected. Also a Cisco Catalyst 2975 Switch stack
appears as a single spanning-tree node to the rest of the network, and all stack members use the
same bridge-id, which simplifies spanning-tree convergence and troubleshooting.
Power over Ethernet
The Cisco Catalyst 2975 Switch provides PoE to allow easy connectivity to Ethernet-powered
devices, including Cisco IP phones and wireless access points. Cisco Catalyst 2975 PoE models
comply with Cisco prestandard PoE and IEEE 802.3af. PoE removes the need for wall power to
each PoE-enabled device and eliminates the cost for additional electrical cable and circuits that
would otherwise be necessary in IP phone and WLAN deployments. PoE switches also eliminate
the need for power injectors and PoE midspans for powering IP devices. The Cisco Catalyst 2975
Switch has a 370W PoE power budget so can support 24 simultaneous full-powered PoE port at
Gigabit Ethernet
At speeds of 1000 Mbps, Gigabit Ethernet provides the bandwidth to meet new and evolving
network demands, alleviate bottlenecks, and boost performance while increasing the return on
existing infrastructure investments. Today’s workers are placing higher demands on networks,
running multiple concurrent applications. For example, a worker joins a team conference call
through an IP videoconference, sends a 10-MB spreadsheet to meeting participants, broadcasts
the latest marketing video for the team to evaluate, and queries the customer relationship
management (CRM) database for the latest real-time feedback. Meanwhile, a multigigabyte
system backup starts in the background, and the latest virus updates are delivered to the client.
Redundant Power System
The Cisco Catalyst 2975 Switches support the new generation of the Cisco Redundant Power
System (RPS) 2300, which increases availability in a converged data, voice, and video network by
providing transparent power backup to two of six attached switches at the same time.
Intelligence in the Network
Networks of today are evolving to address four new developments at the network edge:
Increase in desktop computing power
Introduction of bandwidth-intensive applications
Expansion of highly sensitive data on the network
Presence of multiple device types, such as IP phones, WLAN access points, and IP video
These new demands contend for resources with existing mission-critical applications. As a result,
IT professionals must view the edge of the network as critical to effectively manage the delivery of
information and applications.
As companies increasingly rely on networks as their strategic business infrastructure, it is more
important than ever to help ensure their high availability, security, scalability, and control. By
adding Cisco intelligent functions for LAN access, you can now deploy networkwide intelligent
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Data Sheet
services that consistently address these requirements from the desktop to the core and through
the WAN.
Cisco Catalyst Intelligent Ethernet switches help you realize the full benefits of adding intelligent
services into your networks. Deploying capabilities that make the network infrastructure highly
available to accommodate time-critical needs, scalable to accommodate growth, secure enough to
protect confidential information, and capable of differentiating and controlling traffic flows is critical
to further optimizing network operations.
Enhanced Security
The wide range of security features that the Cisco Catalyst 2975 LAN Base Switch offers helps you
protect important information, keep unauthorized people off the network, guard privacy, and
maintain uninterrupted operation.
The Cisco Identity-Based Networking Services (IBNS) solution provides authentication, access
control, and security policy administration to secure network connectivity and resources. Cisco
IBNS in the Cisco Catalyst 2975 LAN Base Switch prevents unauthorized access and helps ensure
that users get only their designated privileges. It provides the ability to dynamically administer
granular levels of network access. Using the 802.1x standard and the Cisco Secure Access
Control Server (ACS), users can be assigned a VLAN upon authentication, regardless of where
they connect to the network. This setup allows IT departments to enable strong security policies
without compromising user mobility and with minimal administrative overhead.
To guard against denial-of-service (DoS) and other attacks, ACLs can be used to restrict access to
sensitive portions of the network by denying packets based on source and destination MAC
addresses, IP addresses, or TCP/User Datagram Protocol (UDP) ports. ACL lookups are done in
hardware, so forwarding performance is not compromised when ACL-based security is
Port security can be used to limit access on an Ethernet port based on the MAC address of the
device to which it is connected. It also can be used to limit the total number of devices plugged into
a switch port, thereby protecting the switch from a MAC flooding attack as well as reducing the
risks of rogue wireless access points or hubs.
With Dynamic Host Configuration Protocol (DHCP) snooping, DHCP spoofing can be thwarted by
allowing only DHCP requests (but not responses) from untrusted user-facing ports. Additionally,
the DHCP Interface Tracker (Option 82) feature helps enable granular control over IP address
assignment by augmenting a host IP address request with the switch port ID.
The MAC Address Notification feature can be used to monitor the network and track users by
sending an alert to a management station so that network administrators know when and where
users entered the network. Secure Shell Protocol Version 2 (SSHv2) and Simple Network
Management Protocol Version 3 (SNMPv3) encrypt administrative and network-management
information, protecting the network from tampering or eavesdropping. TACACS+ or RADIUS
authentication enables centralized access control of switches and restricts unauthorized users
from altering the configurations. Alternatively, a local username and password database can be
configured on the switch itself. Fifteen levels of authorization on the switch console and two levels
on the web-based management interface provide the ability to give different levels of configuration
capabilities to different administrators.
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Data Sheet
Intelligent PoE Management
The Cisco Catalyst 2975 PoE switch supports Cisco IP phones and Cisco wireless LAN access
points, as well as any IEEE 802.3af-compliant end device.
Cisco Discovery Protocol version 2 allows the Cisco Catalyst 2975 Switch to negotiate a
more granular power setting when connecting to a Cisco powered device, such as IP
phones or access points, than what is provided by IEEE classification.
The PoE MIB provides proactive visibility into power usage and allows you to set different
power level thresholds.
Link Layer Discovery Protocol (LLDP and LLDP-MED) adds support for IEEE 802.1AB link
layer discovery protocol for interoperability in multivendor networks. Switches exchange
speed, duplex, and power settings with end devices such as IP phones.
Availability and Scalability
The Cisco Catalyst 2975 LAN Base Switch is equipped with a large set of features that allow for
network scalability and higher availability through multicast filtering as well as a complete suite of
Spanning Tree Protocol enhancements aimed to maximize availability in a Layer 2 network.
Voice-aware 802.1x port security disables the offending data VLAN when a violation is detected
without affecting Voice VLAN on the same switch port. Enhancements to the standard Spanning
Tree Protocol, such as Per-VLAN Spanning Tree Plus (PVST+), UplinkFast, and PortFast help
maximize network uptime. PVST+ allows for Layer 2 load sharing on redundant links to efficiently
use the extra capacity inherent in a redundant design. UplinkFast, PortFast, and BackboneFast all
greatly reduce the standard 30- to 60-second Spanning Tree Protocol convergence time. FlexLinks
provide bidirectional, fast convergence in less than 100 milliseconds. The Loopguard and bridge
protocol data unit (BPDU) guard enhancements provide Spanning Tree Protocol loop avoidance.
Enhanced QoS
The Cisco Catalyst 2975 LAN Base Switch offers superior multilayer QoS features to help ensure
that network traffic is classified and prioritized and that congestion is avoided in the best possible
manner. Configuration of QoS is greatly simplified through automatic QoS (Auto QoS), a feature
that detects Cisco IP phones and automatically configures the switch for the appropriate
classification and egress queuing. This optimizes traffic prioritization and network availability
without the challenge of a complex configuration.
The Cisco Catalyst 2975 LAN Base Switch can classify, reclassify, police, mark, queue, and
schedule incoming packets and can queue and schedule packets at egress. Packet classification
allows the network elements to discriminate between various traffic flows and enforce policies
based on Layer 2 and Layer 3 QoS fields.
To implement QoS, the Cisco Catalyst 2975 LAN Base Switch first identifies traffic flows or packet
groups, then classifies or reclassifies these groups using the differentiated services code point
(DSCP) field or the 802.1p class of service (CoS) field. Classification and reclassification can be
based on criteria as specific as the source or destination IP address, source or destination MAC
address, or the Layer 4 TCP or UDP port. At the ingress, the Cisco Catalyst 2975 LAN Base
Switch also polices to determine whether a packet is in or out of profile, marks to change the
classification label, passes through or drops out of profile packets, and queues packets based on
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Data Sheet
classification. Control-plane and data-plane ACLs are supported on all ports to help ensure proper
treatment on a per-packet basis.
The Cisco Catalyst 2975 LAN Base Switch supports four egress queues per port, giving network
administrators more control in assigning priorities for the various applications on the LAN. At
egress, the switch performs congestion control and scheduling, the algorithm or process that
determines the order in which queues are processed. The Cisco Catalyst 2975 LAN Base Switch
supports Shaped Round Robin (SRR) and strict priority queuing. The SRR algorithm helps ensure
differential prioritization.
These QoS features allow network administrators to prioritize mission-critical and bandwidthintensive traffic, such as enterprise resource planning (ERP), voice (IP telephony traffic), and
computer-aided design and manufacturing (CAD/CAM), over applications such as FTP or email.
For example, it would be undesirable to have a large file download destined to one port on a switch
increase latency in voice traffic destined to another port on this switch. This condition is avoided by
making sure that voice traffic is properly classified and prioritized throughout the network. Other
applications, such as web browsing, can be handled on a lower-priority basis.
The Cisco Catalyst 2975 LAN Base Switch can perform rate limiting through its support of the
Cisco committed information rate (CIR) function. Through CIR, bandwidth can be guaranteed in
increments as small as 1 Mbps. Bandwidth can be allocated based on several criteria, including
MAC source address, MAC destination address, IP source address, IP destination address, and
TCP or UDP port number. Bandwidth allocation is essential when network environments require
service-level agreements or when it is necessary to control the bandwidth given to certain users.
The new Express Setup feature simplifies the initial configuration of a switch. Now you can set up
the switch through a web browser, eliminating the need for terminal-emulation programs and the
command-line interface (CLI). Express Setup reduces the cost of deployment by helping lessskilled personnel quickly and easily set up switches.
Cisco Network Assistant is a PC-based network-management application optimized for LANs with
up to 250 users. Cisco Network Assistant offers centralized management of Cisco switches,
routers, and WLAN access points. It supports a wide range of Cisco Catalyst intelligent switches
from Cisco Catalyst Express 500 through Cisco Catalyst 4506. Through a user-friendly GUI, users
can configure and manage a wide array of switch functions and start the device manager of Cisco
routers and Cisco wireless access points. A few mouse clicks enable the Cisco recommended
security, availability, and QoS features without the need to consult a detailed design guide. The
Security wizard automatically restricts unauthorized access to servers with sensitive data.
Smartports, and wizards save time for network administrators, reduce human errors, and help
ensure that the configuration of the switch is optimized for these applications. Available at no cost,
Cisco Network Assistant can be downloaded from the Cisco website.
In addition to Cisco Network Assistant, Cisco Catalyst 2975 LAN Base Switch provides extensive
management using SNMP network-management platforms such as the CiscoWorks LAN
Management Solution (LMS). CiscoWorks LMS is a suite of powerful management tools that
simplify the configuration, administration, monitoring, and troubleshooting of Cisco networks. It
integrates these capabilities into a world-class solution for improving the accuracy and efficiency of
your operations staff, while increasing the overall availability of your network. CiscoWorks LMS
supports over 400 different device types, providing:
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Data Sheet
Network discovery, topology views, end-station tracking, and VLAN management
Real-time network fault analysis with easy-to-deploy device-specific best-practice templates
Hardware and software inventory management, centralized configuration tools, and syslog
Network response time and availability monitoring and tracking
Real-time device, link, and port traffic management, analysis, and reporting
Table 1 gives the features and benefits of the Cisco Catalyst 2975 LAN Base Switch. Table 2 gives
the hardware specifications, and Table 3 gives the power specifications. Table 4 lists the
management and standards support, and Table 5 provides the safety and compliance information.
Table 1.
Features and Benefits of Cisco Catalyst 2975 LAN Base Switch
Ease of Use and
● Single configuration file for a stack of up to nine switches
● Auto provisioning and software image update for new stack members
● Express Setup simplifies initial configuration with a web browser, eliminating the need for more
complex terminal emulation programs and CLI knowledge.
● IEEE 802.3af and Cisco prestandard PoE support comes with automatic discovery to detect a Cisco
prestandard or IEEE 802.3af endpoint and provide the necessary power without any user
● Auto Install for configuration and Image update: Simplify management of large number of switches,
by automatically downloading specified configuration and image.
● DHCP autoconfiguration of multiple switches through a boot server eases switch deployment.
● Automatic QoS (Auto QoS) simplifies QoS configuration in voice-over-IP (VoIP) networks by issuing
interface and global switch commands to detect Cisco IP phones, classify traffic, and enable egress
queue configuration.
● Autosensing on each 10/100/1000 port detects the speed of the attached device and automatically
configures the port for 10- or 100- or 1000- Mbps operation, easing switch deployment in mixed 10and 100-Mbps and 1000-Mbps environments.
● Autonegotiating on all ports automatically selects half- or full-duplex transmission mode to optimize
● Dynamic Trunking Protocol (DTP) helps enable dynamic trunk configuration across all switch ports.
● Port Aggregation Protocol (PAgP) automates the creation of Cisco Fast EtherChannel® groups or
Gigabit EtherChannel groups to link to another switch, router, or server.
● Link Aggregation Control Protocol (LACP) allows the creation of Ethernet channeling with devices
that conform to IEEE 802.3ad. This feature is similar to Cisco EtherChannel technology and PAgP.
● DHCP Server enables a convenient deployment option for the assignment of IP addresses in
networks that do not have without a dedicated DHCP server.
● DHCP Relay allows a DHCP relay agent to broadcast DHCP requests to the network DHCP server.
● 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, 1000BASE-BX, 100BASE-FX,
and CWDM physical interface support through a field-replaceable SFP module provides
unprecedented flexibility in switch deployment.
● The default configuration stored in flash memory helps ensure that the switch can be quickly
connected to the network and can pass traffic with minimal user intervention.
● Automatic medium-dependent interface crossover (Auto-MDIX) automatically adjusts transmit and
receive pairs if an incorrect cable type (crossover or straight-through) is installed on a copper port.
● Time-domain reflectometer (TDR) to diagnose and resolve cabling problems on copper ports.
● Configuration Rollback provides the capability to replace the current running configuration with any
saved Cisco IOS Software configuration file. This functionality can be used to revert to a previous
configuration state, effectively rolling back any configuration changes that were made since that
configuration file was saved.
● DHCP Auto Install (Boot Host DHCP) and Auto Image Update allows the switch to automatically
download a configuration file and IOS Software image.
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Data Sheet
● Single IP address management for a stack of switches
● Cisco IOS Software CLI support provides a common user interface and command set with all Cisco
routers and Cisco Catalyst desktop switches.
● IP Service Level Agreement (responder only) uses active monitoring to generate traffic in a
continuous, reliable, and predictable manner, thus enabling the measurement of network
performance and health.
● Switching Database Manager templates for security and QoS allow administrators to easily adjust
memory allocation to the desired features based on deployment-specific requirements.
● VLAN trunks can be created from any port using standards-based 802.1q tagging.
● Up to 255 VLANs per switch and up to 128 spanning-tree instances per switch are supported.
● Four thousand VLAN IDs are supported.
● Voice VLAN simplifies telephony installations by keeping voice traffic on a separate VLAN for easier
administration and troubleshooting.
● Cisco VTP supports dynamic VLANs and dynamic trunk configuration across all switches.
● IGMPv3 snooping for IPv4 and MLD v1 and v2 Snooping for IPv6 provide fast client joins and
leaves of multicast streams and limits bandwidth-intensive video traffic to only the requestors.
● Remote SPAN (RSPAN) allows administrators to remotely monitor ports in a Layer 2 switch network
from any other switch in the same network.
● For enhanced traffic management, monitoring, and analysis, the Embedded Remote Monitoring
(RMON) software agent supports four RMON groups (history, statistics, alarms, and events).
● Layer 2 trace route eases troubleshooting by identifying the physical path that a packet takes from
source to destination.
● All RMON groups are supported through a SPAN port, which permits traffic monitoring of a single
port, or a group of ports, from a single network analyzer or RMON probe.
● Domain Name System (DNS) provides IP address resolution with user-defined device names.
● Trivial File Transfer Protocol (TFTP) reduces the cost of administering software upgrades by
downloading from a centralized location.
● Network Timing Protocol (NTP) provides an accurate and consistent timestamp to all intranet
● Multifunction LEDs per port for port status; half-duplex and full-duplex mode; PoE; and 10BASE-T,
100BASE-TX, and 1000BASE-T indication as well as switch-level status LEDs for system, stack
master, and redundant power supply provide a comprehensive and convenient visual management
● Cisco Discovery Protocol Versions 1 and 2 help enable automatic switch discovery for network
management tools and communicate Voice VLAN information with Cisco IP phones.
● Link Layer Discovery Protocol (LLDP) and LLDP Media Extensions (LLDP-MED) including client
location information. Switches exchange link and device information in multivendor networks.
● IPv6 Host provides basic IPv6 management such as IPv4/IPv6 dual stack, unicast address types,
ICMPv6, AAAA DNS lookup over IPv4, Secure Shell (SSH) for v6, IPv6 neighbor discovery, CDP,
Telnet, TFTP, SNMP, HTTP, HTTPS , Traceroute, syslog for v6.
Cisco Network
Assistant Software
● Cisco Network Assistant is a no-charge, Windows-based application that simplifies the
administration of networks of up to 250 users. It supports a wide range of Cisco Catalyst intelligent
switches. With Cisco Network Assistant, users can manage Cisco Catalyst switches and launch the
device managers of Cisco integrated services routers and Cisco Aironet WLAN access points.
● The easy-to-use graphical interface provides both a topology map and front-panel view of the
cluster and stacks.
● Configuration wizards need just a few user inputs to automatically configure the switch to optimally
handle different types of traffic: voice, video, multicast, and high-priority data.
● A security wizard is provided to restrict unauthorized access to applications, servers, and networks.
● Upgrading the Cisco IOS Software on Cisco Catalyst switches is a simple matter of pointing and
clicking, with one-click upgrades.
● Cisco Network Assistant supports multilayer feature configurations such as routing protocols, ACLs,
and QoS parameters.
● Multidevice and multiport configuration capabilities allow administrators to save time by configuring
features across multiple switches and ports simultaneously.
● The user-personalized interface allows modification of polling intervals, table views, and other
● Alarm notification provides automated email notification of network errors and alarm thresholds.
Cisco Express
● Express Setup simplifies initial configuration of a switch through a web browser, eliminating the
need for terminal emulation programs and CLI knowledge.
● The web interface helps less-skilled personnel quickly and simply set up switches, thereby reducing
the cost of deployment.
● CiscoWorks network-management software provides management capabilities on a per-port and
per-switch basis, providing a common management interface for Cisco routers, switches, and hubs.
● SNMPv1, v2c, and v3 and Telnet interface support delivers comprehensive in-band management,
and a CLI-based management console provides detailed out-of-band management.
● The CiscoWorks LAN Management Solution supports the Cisco Catalyst 2975 Switch.
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Data Sheet
Availability and Scalability
Redundancy for
Fault Backup
● IEEE 802.1x Voice-aware security disables the offending data VLAN when a violation is detected
without affecting Voice VLAN on the same switch port
● IEEE 802.1x readiness check determines readiness of connected end hosts, before configuring
802.1x on the switch.
● Cisco UplinkFast and BackboneFast technologies help ensure quick failover recovery, enhancing
overall network stability and reliability.
● IEEE 802.1w Rapid Spanning Tree Protocol provides rapid spanning-tree convergence independent
of spanning-tree timers and the benefit of distributed processing.
● Per-VLAN Rapid Spanning Tree Plus (PVRST+) allows rapid spanning-tree reconvergence on a
per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree instances.
● Clustering with single IP address management and SNMP and SYSLOG proxy for up to 16
switches. Clustering command-switch redundancy allows designation of a backup command switch
that takes over if the primary command switch fails.
● Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links to be
detected and disabled to avoid problems such as spanning-tree loops.
● Switch port autorecovery (errdisable) automatically attempts to re-enable a link that is disabled
because of a network error.
● Cisco Redundant Power System 2300 (RPS 2300) support provides superior internal power-source
redundancy for up to six Cisco networking devices, resulting in improved fault tolerance and
network uptime.
● Bandwidth aggregation up to 8 Gbps through Cisco Gigabit EtherChannel technology and up to 800
Mbps through Cisco Fast EtherChannel technology enhances fault tolerance and offers higherspeed aggregated bandwidth between switches and to routers and individual servers.
● Flex Links provides link redundancy with convergence time 100ms without requiring Spanning Tree
● VLAN Flex Links load balancing improves network throughput by utilizing both links for traffic
distribution for different VLANs.
● Link State Tracking provides Layer 2 redundancy in the network when used in conjunction with
server or programmable logic controller (PLC) network interface card (NIC) adapter teaming.
Integrated Cisco
IOS Software
Features for
● Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from degrading
overall systems performance.
● IEEE 802.1d Spanning Tree Protocol support for redundant backbone connections and loop-free
networks simplifies network configuration and improves fault tolerance.
● PVST+ allows for Layer 2 load sharing on redundant links to efficiently use the extra capacity
inherent in a redundant design.
● IEEE 802.1s Multiple Spanning Tree Protocol allows a spanning-tree instance per VLAN, enabling
Layer 2 load sharing on redundant links.
● Egress committed rate (ECR) guarantee provides load balancing and redundancy.
● Local Proxy Address Resolution Protocol (ARP) works in conjunction with Private VLAN Edge to
minimize broadcasts and maximize available bandwidth.
● VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.
● VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by flooding
broadcast traffic only on trunk links required to reach the destination devices.
● Internet Group Management Protocol (IGMP) version 3 snooping provides fast client joins and
leaves of multicast streams and limits bandwidth-intensive video traffic to only the requestors.
● IGMP filtering provides multicast authentication by filtering out no subscribers and limits the number
of concurrent multicast streams available per port.
● Multicast VLAN registration (MVR) continuously sends multicast streams in a multicast VLAN while
isolating e streams from subscriber VLANs for bandwidth and security reasons.
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Data Sheet
QoS and Control
Enhanced QoS
● Standard 802.1p CoS and DSCP field classification are provided, using marking and reclassification
on a per-packet basis by source and destination IP address, source and destination MAC address,
or Layer 4 TCP or UDP port number.
● Cisco control-plane and data-plane QoS ACLs on all ports help ensure proper marking on a perpacket basis.
● Four egress queues per port enable differentiated management of up to four traffic types.
● SRR scheduling helps ensure differential prioritization of packet flows by intelligently servicing the
ingress and egress queues.
● Weighted tail drop (WTD) provides congestion avoidance at the ingress and egress queues before
a disruption occurs.
● Strict priority queuing guarantees that the highest-priority packets are serviced ahead of all other
● There is no performance penalty for highly granular QoS functions.
Granular Rate
● The Cisco CIR function guarantees bandwidth in increments as small as 1 Mbps.
● Rate limiting is provided based on source and destination IP address, source and destination MAC
address, Layer 4 TCP and UDP information, or any combination of these fields, using QoS ACLs
(IP ACLs or MAC ACLs), class maps, and policy maps.
● Asynchronous data flows upstream and downstream from the end station or on the uplink are easily
managed using ingress policing and egress shaping.
● Up to 64 aggregate or individual polices are available per Fast Ethernet or Gigabit Ethernet port.
Security Features
● IEEE 802.1x allows dynamic, port-based security, providing user authentication.
● IEEE 802.1x with VLAN assignment allows a dynamic VLAN assignment for a specific user
regardless of where the user is connected.
● IEEE 802.1x with voice VLAN permits an IP phone to access the voice VLAN irrespective of the
authorized or unauthorized state of the port.
● IEEE 802.1x and port security are provided to authenticate the port and manage network access for
all MAC addresses, including those of the client.
● IEEE 802.1x with Guest VLAN allows guests without 802.1x clients to have limited network access
on the guest VLAN.
● Web authentication for non-802.1x clients allows non-802.1x clients to use an SSL-based browser
for authentication.
● MAC Auth Bypass (MAB) for voice allows third-party IP phones without an 802.1x supplicant to get
authenticated using their MAC address.
● Port-based ACLs for Layer 2 interfaces allow application of security policies on individual switch
● Unicast MAC filtering prevents the forwarding of any type of packet with a matching MAC address.
● Unknown unicast and multicast port blocking allows tight control by filtering packets that the switch
has not already learned how to forward.
● SSHv2 and SNMPv3 provide network security by encrypting administrator traffic during Telnet and
SNMP sessions. SSHv2 and the cryptographic version of SNMPv3 require a special cryptographic
software image because of U.S. export restrictions.
● Bidirectional data support on the Switched Port Analyzer (SPAN) port allows the Cisco Secure
intrusion detection system (IDS) to take action when an intruder is detected.
● TACACS+ and RADIUS authentication enable centralized control of the switch and restrict
unauthorized users from altering the configuration.
● MAC address notification allows administrators to be notified of users added to or removed from the
● DHCP snooping allows administrators to help ensure consistent mapping of IP to MAC addresses.
This can be used to prevent attacks that attempt to poison the DHCP binding database, and to ratelimit the amount of DHCP traffic that enters a switch port.
● DHCP Interface Tracker (Option 82) feature augments a host IP address request with the switch
port ID.
● Port security secures the access to an access or trunk port based on MAC address.
● After a specific timeframe, the aging feature removes the MAC address from the switch to allow
another device to connect to the same port.
● Trusted Boundary provides the ability to trust the QoS priority settings if an IP phone is present and
to disable the trust setting if the IP phone is removed, thereby preventing a malicious user from
overriding prioritization policies in the network.
● Multilevel security on console access prevents unauthorized users from altering the switch
● The user-selectable address-learning mode simplifies configuration and enhances security.
● BPDU Guard shuts down Spanning Tree Protocol PortFast-enabled interfaces when BPDUs are
received to avoid accidental topology loops.
● Spanning-Tree Root Guard (STRG) prevents edge devices not in the network administrator’s
control from becoming Spanning Tree Protocol root nodes.
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Data Sheet
Security Features
Table 2.
● Voice VLAN aware port security and BPDU Guard allow Voice VLAN traffic to not be disrupted
when security violations occur.
● IGMP filtering provides multicast authentication by filtering out no subscribers and limits the number
of concurrent multicast streams available per port.
● Dynamic VLAN assignment is supported through implementation of VLAN Membership Policy
Server (VMPS) client functions to provide flexibility in assigning ports to VLANs. Dynamic VLAN
helps enable the fast assignment of IP addresses.
● Cisco Network Assistant software security wizards ease the deployment of security features for
restricting user access to a server as well as to a portion of or the entire network.
● Up to 512 (ACEs) are supported, with two profiles: Security (384 Security ACL entries and 128 QoS
policies), and QoS (128 Security ACL entries and 384 QoS policies).
Cisco Catalyst 2975 LAN Base Switch Hardware
● 32 Gbps switching fabric
● 38.7 Mpps forwarding rate based on 64-byte packets:
● 128 MB DRAM
● 32 MB flash memory
● Configurable up to 8000 MAC addresses
● Configurable up to 255 IGMP groups
● Configurable maximum transmission unit (MTU) of up to 9000 bytes, with a maximum Ethernet
frame size of 9018 bytes (Jumbo frames) for bridging on Gigabit Ethernet ports, and up to 1998
bytes for bridging of Multiprotocol Label Switching (MPLS) tagged frames on 10/100/1000 ports
and Cabling
● 10BASE-T ports: RJ-45 connectors, 2-pair Category 3, 4, or 5 unshielded twisted-pair (UTP) cabling
● 100BASE-TX ports: RJ-45 connectors, 2-pair Category 5 UTP cabling
● 1000BASE-T ports: RJ-45 connectors, 4-pair Category 5 UTP cabling
● 1000BASE-T SFP-based ports: RJ-45 connectors, 4-pair Category 5 UTP cabling
● 1000BASE-SX, -LX/LH, -ZX, -BX and CWDM SFP-based ports: LC fiber connectors
(single/multimode fiber)
● 100BASE-FX: LC fiber connectors (single/multimode fiber).
Power Connectors
● Customers can provide power to a switch by using either the internal power supply or the Cisco
RPS 2300 or RPS 675. The connectors are located at the back of the switch.
Internal Power-Supply Connector:
● The internal power supply is an autoranging unit.
● The internal power supply supports input voltages between 100 and 240VAC.
● Use the supplied AC power cord to connect the AC power connector to an AC power outlet.
Cisco RPS Connector:
● The connector offers connection for an optional Cisco RPS 2300 that uses AC input and supplies
DC output to the switch.
● The connector offers a 2300W redundant power system that supports up to six external network
devices and provides power to two failed devices at a time.
● The connector automatically senses when the internal power supply of a connected device fails and
provides power to the failed device, preventing loss of network traffic.
● Only the Cisco RPS 2300 (model PWR-RPS2300) or Cisco RPS 675 should be attached to the
redundant-power-system receptacle.
● Per-port status: Link integrity, disabled, activity, speed, full-duplex, PoE
● System status: System, RPS, link status, link duplex, link speed, stack, master, PoE
(H x W x D)
● 1.73 x 17.5 x 16.1 in.
(4.4 x 44.5 x 40.9 cm)
● 15.5 lb (7.0 kg)
Normal Operating Conditions:
● -5ºC to +45ºC, up to 5,000 feet (1500 m)
● -5ºC to +40ºC, up to 10,000 feet (3000 m)
● -5ºC to +35ºC, up to 13,000 feet (4000 m)
Short-Term* Exceptional Operating Conditions:
● -5ºC to +55ºC, at sea level
● -5ºC to +50ºC, up to 5,000 feet (1500 m)
● -5ºC to +45ºC, up to 10,000 feet (3000 m)
● -5'C to +40'C, up to 13,000 feet (4000 m)
* Not more than following in one year period: 96 consecutive hours, or 360 hours total, or 15
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 10 of 14
Data Sheet
Acoustic Noise
● 52-58 dBa (ISO 7779: Bystander position operating to an ambient temperature of 25°C)
Mean Time
Between Failure
● 143,197 hrs
Table 3.
Power Specifications for Cisco Catalyst 2975 LAN Base Switch
Maximum Power
● Full PoE load: 560W, 1910 BTUs per hour (370W PoE budget)
● Dissipated Power: 190W, 648 BTUs per hour
AC Input Voltage
and Current
● 100-240 VAC (autoranging) 8.0-4.0A, 50-60 Hz
Power Rating
● 0.560 kVA
DC Input Voltages
(RPS Input)
● +12V at 11.25A, -48V at 7.8A
Table 4.
Management and Standards Support for Cisco Catalyst 2975 LAN Base Switches
● RFC1213-MIB
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 11 of 14
Data Sheet
● IEEE 802.1D Spanning Tree Protocol
● IEEE 802.1p CoS Prioritization
● 100BASE-FX (SFP)
● 1000BASE-BX (SFP)
● IEEE 802.1Q VLAN
● IEEE 802.1s
● 1000BASE-SX (SFP)
● 1000BASE-LX/LH (SFP)
● IEEE 802.1w
● IEEE 802.1x
● 1000BASE-ZX (SFP)
● 1000BASE-CWDM SFP 1470 nm
● IEEE 802.1AB (LLDP)
● IEEE 802.3ad
● 1000BASE-CWDM SFP 1490 nm
● 1000BASE-CWDM SFP 1510 nm
● IEEE 802.3af
● IEEE 802.3ah (100BASE-X single/multimode fiber
● IEEE 802.3x full duplex on 10BASE-T, 100BASE-TX,
and 1000BASE-T ports
● IEEE 802.3 10BASE-T specification
● 1000BASE-CWDM SFP 1530 nm
● 1000BASE-CWDM SFP 1550 nm
● IEEE 802.3u 100BASE-TX specification
● IEEE 802.3ab 1000BASE-T specification
● 1000BASE-CWDM SFP 1570 nm
● 1000BASE-CWDM SFP 1590 nm
● 1000BASE-CWDM SFP 1610 nm
● RMON I and II standards
● SNMPv1, SNMPv2c, and SNMPv3
● IEEE 802.3z 1000BASE-X specification
Table 5.
Safety and Compliance
Safety Certifications
● UL 60950-1, First Edition
● CUL to CAN/CSA 22.2 No. 60950-1, First Edition
● TUV/GS to EN 60950-1, First Edition
● CB to IEC 60950-1 with all country deviations
● CE Marking
● NOM (through partners and distributors)
Compatibility Certifications
● FCC Part 15 Class A
● EN 55022 Class A (CISPR22)
● EN 55024 (CISPR24)
● AS/NZS CISPR22 Class A
● CE
● CNS13438 Class A
● China EMC Certifications
Reduction of Hazardous Substances (ROHS) 5
Common Language Equipment Identifier (CLEI) code
Limited lifetime warranty
Service and Support
Cisco is committed to minimizing total cost of ownership. Our portfolio of technical support
services helps ensure that Cisco products operate efficiently, remain highly available, and benefit
from the most up-to-date system software. The services and support programs described in Table
6 are available as part of the Cisco Desktop Switching Service and Support solution and are
available directly from Cisco and through resellers.
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 12 of 14
Data Sheet
Table 6.
Cisco Services and Support Programs
Service and Support
● Cisco Total Implementation
Solutions (TIS), available direct from
● Cisco Packaged TIS, available
through resellers
● Cisco SMARTnet® and SMARTnet
Onsite support, available direct from
● Cisco Packaged SMARTnet support
program, available through resellers
● Cisco Smart Foundation (formerly
SMB Support Assistant)
● Project management
● Site survey, configuration, and
● Installation, text, and cutover
● Supplements existing staff
● Helps ensure that functions meet
● Mitigates risk
● Training
● Major moves, adds, and changes
● Helps enable proactive or expedited
issue resolution
● Lowers total cost of ownership by
taking advantage of Cisco expertise
and knowledge
● Helps minimize network downtime
● Design review and product staging
● 24-hour access to software updates
● Web access to technical repositories
● Telephone support through the Cisco
Technical Assistance Center
● Advance replacement of hardware
Ordering Information
Table 7 gives ordering information for Cisco Catalyst 2975 LAN Base Switches.
Table 7.
Ordering Information for Cisco Catalyst 2975 LAN Base Switch
Part Numbers
● 48 Ethernet 10/100/1000 PoE ports and 4 SFP uplinks
● Two high speed stacking ports with 50cm stacking cable
● 1 RU fixed-configuration with rack mount included
● LAN Base Image installed
Two units of the WS-C2975GS-48PS-L for 96 access ports
50cm stacking cable for the Catalyst 2975
1m stacking cable for the Catalyst 2975
3m stacking cable for the Catalyst 2975
50cm stacking cable (non halogen lead free) for the Catalyst 2975
1m stacking cable (non halogen lead free) for the Catalyst 2975
3m stacking cable (non halogen lead free) for the Catalyst 2975
Cisco Redundant Power System 2300 and Blower,No Power Supply
Spare Bay Insert for Cisco Redundant Power System 2300
Spare RPS2300 Cable for Cisco Catalyst 2975 Switch
Spare 45CFM Blower for Cisco Redundant Power System 2300
Cisco Catalyst 3750-E/3560-E/RPS 2300 750WAC power supply spare
Spare rack-mount kit for the Cisco Catalyst 2975 Switch
1 RU recessed rack-mount kit for the Cisco Catalyst 2975 Switch
1000BASE-LX/LH SFP transceiver module for MMF and SMF, 1300-nm wavelength
1000BASE-SX SFP transceiver module for MMF, 850-nm wavelength
1000BASE-ZX SFP transceiver module for SMF, 1550-nm wavelength
1000BASE-T SFP transceiver module for Category 5 copper wire
1000BASE-BX10 SFP transceiver module for single strand SMF, 1490-nm TX / 1310-nm RX
1000BASE-BX10 SFP transceiver module for single strand SMF, 1310-nm TX / 1490-nm RX
100BASE-FX SFP module for Gigabit Ethernet ports, 1310-nm wavelength, 2 km over MMF
Cisco CWDM SFP 1470 nm; Gigabit Ethernet and 1G/2G FC (gray)
Cisco CWDM SFP, 1490 nm; Gigabit Ethernet and 1G/2G FC (violet)
Cisco CWDM SFP, 1510 nm; Gigabit Ethernet and 1G/2G FC (blue)
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 13 of 14
Data Sheet
Cisco CWDM SFP, 1530 nm; Gigabit Ethernet and 1G/2G FC (green)
Cisco CWDM SFP, 1550 nm; Gigabit Ethernet and 1G/2G FC (yellow)
Cisco CWDM SFP, 1570 nm; Gigabit Ethernet and 1G/2G FC (orange)
Cisco CWDM SFP, 1590 nm; Gigabit Ethernet and 1G/2G FC (red)
Cisco CWDM SFP, 1610 nm; Gigabit Ethernet and 1G/2G FC (brown)
1m fiber single-mode LC-to-SC connectors
5m fiber single-mode LC-to-SC connectors
For more information about Cisco products, contact:
United States and Canada (toll free): (800) 553-6387
Europe: 32 2 778 4242
Australia: 612 9935 4107
Other: (408) 526-7209
Printed in USA
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
C78-502660-00 11/08
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