| 8.2 | HSRP Configuration | ||
| 8.2.4 | HSRP hello timers |
| An HSRP-enabled router sends hello
messages to indicate that the router is running and is capable of
becoming either the active or standby router. The hello message
contains the priority of the router, as well as a hellotime
and holdtime value.
The hellotime value
indicates the interval between the hello messages that the router
sends. The holdtime value
contains the amount of time that the current hello message is
considered valid.
If an active router sends a hello message, then receiving routers consider that hello message to be valid for one holdtime. Note: The holdtime should be at least three times the value of the hellotime. Both the hellotime and the holdtime parameters are configurable. To configure the time between hellos and the time before other group routers declare the active or standby router to be "down," enter the following command in interface configuration mode.
The example in the Figure sets the hellotime to 5 seconds and the holdtime to 15 seconds. To reinstate the default standby timer values, enter the no standby group timers command.
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