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Catalyst 2940 Switch Software Configuration Guide
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Chapter 5 Clustering Switches
Creating a Switch Cluster
Note • We strongly recommend that the highest-end, command-capable switch in the cluster be the
command switch:
–
If your switch cluster has a Catalyst 3550 switch, that switch should be the command switch.
–
If your switch cluster has Catalyst 2900 XL, Catalyst 2950, Catalyst 2955, and
Catalyst 3500 XL switches, the Catalyst 2950 or Catalyst 2955 switch should be the command
switch.
–
If your cluster has Catalyst 1900, Catalyst 2820, and Catalyst 2940 switches, the Catalyst 2940
switch should be the command switch.
–
If your switch cluster has Catalyst 1900, Catalyst 2820, Catalyst 2900 XL, and
Catalyst 3500 XL switches, either the Catalyst 2900 XL or Catalyst 3500 XL switch should be
the command switch.
You can enable a command switch, name the cluster, and assign an IP address and a password to the
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 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 command
switch, you can use the cluster enable global configuration command.
Figure 5-7 Create Cluster Window
Adding Member Switches
As explained in the “Automatic Discovery of Cluster Candidates and Members” section on page 5-3, the
command switch automatically discovers candidate switches. When you add new cluster-capable
switches to the network, the 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.
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