Configuration Guide User guide

344 FastIron Configuration Guide
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Hitless stacking
For a description of this feature’s impact on major system functions, refer to Table 56 on page 330.
For examples of hitless stacking switchover operation, refer to “Hitless stacking switchover
examples” on page 345.
Executing a hitless stacking switchover
The following must be in effect before a hitless switchover (switch over to the Standby Controller) is
allowed:
• Hitless stacking is enabled
• The stack has a Standby Controller
• The Standby Controller has learned the protocols
• The Standby Controller has the same priority as the Active Controller
• More than 120 seconds have passed since the previous switchover or failover
You can use the show stack command to view whether or not these properties are in effect. For
more information, refer to “Displaying information about hitless stacking” on page 350.
To perform a switchover, enter the following command:
Brocade# stack switch-over
Standby unit 8 will become Active Controller, and unit 1 will become standby
Are you sure? (enter 'y' or 'n'): y
Unit 1 is no longer the Active Controller
Syntax: stack switch-over