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Cisco Catalyst 2950 Software Guide

Cisco Catalyst 2950
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5-4
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-03
Chapter 5 Clustering Switches
Planning a Switch Cluster
Planning a Switch Cluster
Anticipating conflicts and compatibility issues is a high priority when you manage several switches
through a cluster. This section describes these guidelines, requirements, and caveats that you should
understand before you create the cluster:
Automatic Discovery of Cluster Candidates and Members, page 5-4
HSRP and Standby Command Switches, page 5-10
IP Addresses, page 5-13
Host Names, page 5-14
Passwords, page 5-14
SNMP Community Strings, page 5-14
TACACS+, page 5-15
Access Modes in CMS, page 5-15
Management VLAN, page 5-15
LRE Profiles, page 5-16
Availability of Switch-Specific Features in Switch Clusters, page 5-16
Refer to the release notes for the list of Catalyst switches eligible for switch clustering, including which
ones can be command switches and which ones can only be member switches, and for the required
software versions and browser and Java plug-in configurations.
Automatic Discovery of Cluster Candidates and Members
The command switch uses Cisco Discovery Protocol (CDP) to discover member switches, candidate
switches, neighboring switch clusters, and edge devices in star or cascaded topologies.
Note Do not disable CDP on the command switch, on cluster members, or on any cluster-capable switches that
you might want a command switch to discover. For more information about CDP, see the Configuring
CDP sectiononpage6-13.
Following these connectivity guidelines ensures automatic discovery of the switch cluster, cluster
candidates, connected switch clusters, and neighboring edge devices:
Discovery through CDP Hops, page 5-5
Discovery through Non-CDP-Capable and Noncluster-Capable Devices, page 5-6
Discovery through Different Management VLANs, page 5-8
Discovery through the Same Management VLAN, page 5-7
Discovery of Newly Installed Switches, page 5-9

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Cisco Catalyst 2950 Specifications

General IconGeneral
Forwarding Bandwidth8.8 Gbps
Switching Capacity13.6 Gbps
Forwarding Rate6.6 Mpps
Weight3.6 kg
RAM16 MB
Flash Memory8 MB
Operating Humidity10% to 85% non-condensing
Uplink Ports2 x 10/100/1000Base-T
Dimensions4.4 cm x 44.5 cm x 24.2 cm
Remote Management ProtocolSNMP, Telnet, HTTP
FeaturesQuality of Service (QoS), VLAN support
Compliant StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicatorssystem
Operating Temperature0 to 45°C
Ports24 x 10/100 Ethernet ports
MAC Address Table Size8, 192 entries
Power SupplyInternal 100-240V AC, 50-60Hz

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