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Catalyst 3750 Switch Software Configuration Guide
78-16180-02
Chapter 6 Clustering Switches
Creating a Switch Cluster
• PC—Member of the cluster standby group but not the standby cluster command switch
• HC—Candidate switch that can be added to the cluster standby group
• CC—Cluster command switch when HSRP is disabled
You must enter a virtual IP address for the cluster standby group. This address must be in the same subnet
as the IP addresses of the switch. The group number must be unique within the IP subnet. It can be from
0 to 255, and the default is 0. The group name can have up to 31 characters.
The Standby Command Configuration window uses the default values for the preempt and name
commands that you have set by using the CLI. If you use this window to create the standby group, all
switches in the group have the preempt command enabled. You must also provide a name for the group.
Note The HSRP standby hold time interval should be greater than or equal to three times the hello time
interval. The default HSRP standby hold time interval is 10 seconds. The default HSRP standby hello
time interval is 3 seconds. For more information about the standby hold time and standby hello time
intervals, see the “Configuring HSRP Authentication and Timers” section on page 35-9.
Figure 6-11 Standby Command Configuration Window
stack10 (cisco WS-C3750-24TS, HC, ..
TRS (cisco WS-C37xx-24, HC, ...)
stack1 (cisco WS-3750-48, CC, 0)
G-M-C3550-24 (cisco WS-C3550-24, H
Active command switch.
Standby command
switch.
Must be a valid IP
address in the same
subnet as the active
command switch.
Once entered, this
information cannot be
changed.
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