Creating A Cluster Standby Group - Cisco Catalyst 2950 Software Configuration Manual

Chapter 6 Clustering Switches

Creating a Cluster Standby Group

The cluster standby group members must meet the requirements described in the
Switch Characteristics" section on page 6-3
page
(Figure
Instead of using CMS to add switches to a standby group and to bind the standby group to a cluster, you
can use the standby ip, the standby name, and the standby priority interface configuration commands
and the cluster standby group global configuration command.
Note •
•
•
•
These abbreviations are appended to the switch host names in the Standby Command Group list to show
their eligibility or status in the cluster standby group:
•
•
•
•
•
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 HSRP group, all
switches in the group have the preempt command enabled. You must also provide a name for the group.
The HSRP standby hold time interval should be greater than or equal to 3 times the hello time interval.
Note
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 hello time intervals, refer
to the Cisco IOS Release 12.1 documentation set on Cisco.com.
78-11380-04
6-14. To create a cluster standby group, select Cluster > Standby Command Switches
6-13).
When the command switch is a Catalyst 3550 switch, all standby command switches must be
Catalyst 3550 switches.
When the command switch is a Catalyst 2950 switch running Release 12.1(9)EA1 or later, all
standby command switches must be Catalyst 2950 switches running Release 12.1(9)EA1 or later.
When the command switch is a Catalyst 2950 switch running Release 12.1(6)EA2 or later, all
standby command switches must be Catalyst 2950 switches running Release 12.1(6)EA2 or later.
When the command switch is running Release 12.0(5)WC2 or earlier, the standby command
switches can be these switches: Catalyst 2900 XL, Catalyst 2950, and Catalyst 3500 XL switches.
AC—Active command switch
SC—Standby command switch
PC—Member of the cluster standby group but not the standby command switch
HC—Candidate switch that can be added to the cluster standby group
CC—Command switch when HSRP is disabled
and "HSRP and Standby Command Switches" section on
Catalyst 2950 Desktop Switch Software Configuration Guide
Creating a Switch Cluster
"Standby Command
6-25