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Catalyst 3750 Switch Software Configuration Guide
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Chapter 6 Clustering Switches
Creating a Switch Cluster
LRE Profiles
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 cluster command switch displays all options available from the switch cluster.
Therefore, features specific to a cluster 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 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 Cluster Command Switch, page 6-17
• Adding Cluster Member Switches, page 6-18
• Creating a Cluster Standby Group, page 6-20
This section assumes you have already connected the switches, as described in the switch hardware
installation guide, and followed the guidelines described in the “Planning a Switch Cluster” section on
page 6-4.
Note Refer to the release notes for the list of Catalyst switches eligible for switch clustering, including which
ones can be cluster command switches and which ones can only be cluster member switches, and for the
required software versions and browser and Java plug-in configurations.
Enabling a Cluster Command Switch
The switch you designate as the cluster command switch must meet the requirements described in the
“Cluster Command Switch Characteristics” section on page 6-3, the “Planning a Switch Cluster” section
on page 6-4, and the release notes.
Note If your switch cluster has a Catalyst 3750 switch or switch stack, it must be the cluster command switch.
You can enable a cluster command switch, name the cluster, and assign an IP address and a password to
the cluster command switch when you run the setup program during initial switch setup. For information
about using the setup program, refer to the release notes.
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