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Catalyst 2940 Switch Software Configuration Guide
78-15507-02
Chapter 5 Clustering Switches
Creating a Switch Cluster
LRE Profiles
In Cisco IOS Release 12.1(14)EA1 or later, the Catalyst 2950 LRE switches do not support public
profiles.
In software releases earlier than Cisco IOS Release 12.1(19)EA1, a configuration conflict occurs if a
switch cluster has Long-Reach Ethernet (LRE) switches that use both private and public profiles. If one
LRE switch in a cluster is assigned a public profile, all LRE switches in that cluster must have that same
public profile. Before you add an LRE switch to a cluster, make sure that you assign it the same public
profile used by other LRE switches in the cluster.
A cluster can have a mix of LRE switches that use different private profiles.
Availability of Switch-Specific Features in Switch Clusters
The menu bar on the command switch displays all options available from the switch cluster. Therefore,
features specific to a member switch are available from the command-switch menu bar. For example,
Device > LRE Profile appears in the command-switch menu bar when at least one
Catalyst 2900 LRE XL or Catalyst 2950 LRE switch is in the cluster.
Creating a Switch Cluster
Using CMS to create a cluster is easier than using the CLI commands. This section provides this
information:
• Enabling a Command Switch, page 5-15
• Adding Member Switches, page 5-16
• Creating a Cluster Standby Group, page 5-19
• Verifying a Switch Cluster, page 5-20
This section assumes you have already cabled the switches, as described in the switch hardware
installation guide, and followed the guidelines described in the “Planning a Switch Cluster” section on
page 5-3.
Note 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. See Chapter 5,
“Clustering Switches,” for the required software versions and browser and Java plug-in configurations.
Enabling a Command Switch
The switch you designate as the command switch must meet the requirements described in the
“Command Switch Characteristics” section on page 5-2, the “Planning a Switch Cluster” section on
page 5-3, and the release notes.