Which configuration command can you apply to a router so that its local interface becomes active if all other routers in the group fail?
A. Router(config)#standby 1 preempt
B. No additional configuration is required
C. Router(config)#standby 1 Priority 250
D. Router(config)#standby 1 track Ethernet
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The answer is B.
When all other routers in the group fail, the local router will not receive any HSRP Hello messages so it will become “active”. Notice that in this case the “preempt” command is not necessary.
The “preempt” command is only useful when the local router receives a HSRP Hello message from the active HSRP router with a lower priority (then the local router will decide to take over the active role).