Specifications

5-16
Catalyst 2970 Switch Software Configuration Guide
78-15462-03
Chapter 5 Clustering Switches
Creating a Switch Cluster
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 5-3, the “Planning a Switch Cluster” section
on page 5-4, and the release notes.
Note If your switch cluster has a Catalyst 2970 switch, it should be the cluster command switch unless the
cluster has a Catalyst 3750 switch or switch stack. If the switch cluster has a Catalyst 3750 switch or
switch stack, that switch or switch stack 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.
If you did not enable a cluster command switch during initial switch setup, launch Device Manager from
a command-capable switch, and select Cluster > Create Cluster. Enter a cluster number (the default
is 0), and use up to 31 characters to name the cluster (Figure 5-7). Instead of using CMS to enable a
cluster command switch, you can use the cluster enable global configuration command.
Figure 5-7 Create Cluster Window
Adding Cluster Member Switches
As explained in the “Automatic Discovery of Cluster Candidates and Members” section on page 5-5, the
cluster command switch automatically discovers candidate switches. When you add new cluster-capable
switches to the network, the cluster command switch discovers them and adds them to a list of candidate
switches.
To display an updated cluster candidates list from the Add to Cluster window (Figure 5-8), either
relaunch CMS and redisplay this window, or follow these steps:
1. Close the Add to Cluster window.
2. Select View > Refresh.
3. Select Cluster > Add to Cluster to redisplay the Add to Cluster window.
Enter up to 31 characters
to name the cluster.
93333
C3750-24TS