Brocade FastIron Ethernet Switch Stacking Configuration Guide - Manual (Page 111)

8 S FCX648 active 0000.0077.7980 128 local Ready
active standby
+---+ +---+ +---+
-2/1| 8 |2/2--2/2| 3 |2/1--2/1| 5 |2/2-
| +---+ +---+ +---+ |
| |
|-------------------------------------|
Standby u5 - No hitless failover. Reason: hitless-failover not configured
Displaying pending device roles
When hitless stacking is disabled, a priority change will trigger an election, but the newly-elected winner
will not assume its role until the entire stack is reloaded or hitless stacking is enabled.
You can use the show stack command to view pending device roles. The “Role” column displays the
current role for each unit. The “Comment” column displays the role that will take effect after a reload or
when hitless stacking is enabled.
device#show stack
alone: standalone, D: dynamic config, S: static config
ID Type Role MAC Address Pri State Comment
2 S FCX648S member 0000.0000.0000 0 reserve
3 S FCX624 standby 0000.0076.2640 200 remote Ready, active if reloaded
5 S FCX624 member 0000.0000.0400 128 remote Ready, standby if reloaded
8 S FCX648 active 0000.0077.7980 128 local Ready, member if reloaded
active standby
+---+ +---+ +---+
-2/1| 8 |2/2--2/2| 3 |2/1--2/1| 5 |2/2-
| +---+ +---+ +---+ |
| |
|-------------------------------------|
Standby u3 - No hitless failover. Reason: hitless-failover not configured
Hitless stacking failover
Hitless stacking failover provides automatic failover from the active controller to the standby controller
without resetting any of the units in the stack and with sub-second or no packet loss to hitless stacking-
supported services and protocols.
For a description of the events that occur during a hitless failover, refer to “What happens during a
hitless stacking switchover or failover.”
For a description of this feature’s impact on major system functions, refer to “Supported hitless stacking
protocols and services.”
For an example of hitless failover operation, refer to “Hitless stacking failover example.”
For feature limitations and configuration notes, refer to “Hitless stacking configuration notes and feature
limitations.”
Enabling hitless stacking failover
To enable hitless stacking failover, enter the following command at the global CONFIG level of the CLI:
device(config)# hitless-failover enable
The command takes effect immediately. Hitless switchover is allowed, and in the event of a failover, the
standby controller will take over the active role without reloading the stack.
Syntax: [no] hitless-failover enable
Use the no form of the command to disable hitless stacking once it has been enabled.
Displaying pending device roles
FastIron Ethernet Switch Stacking Configuration Guide 109
53-1003090-02