Understand and Configure HSRP Timers on Cisco Router

In below post you can understand the HSRP timers and HSRP timers configuration steps on Cisco Router or Switch.

HSRP Hello and Hold Time Intervals

Hello interval time

An HSRP-enabled Router sends hello messages to indicate that the Router is running and is capable of becoming either the active or the standby router. The interval between successive HSRP hello messages from a given HSRP Router. Default = 3 seconds.

Hold interval time

The interval between the receipt of a hello message and the assumption that the sending Router has failed. Default = 10 seconds.

Timers in HSRP Router

Active timer

This timer is used to monitor the active Router. The timer resets any time a Router in the standby group receives a hello packet from the active Router. This timer expires in accordance with the hold time value that is set in the corresponding field of the HSRP hello message.

Standby timer

This timer is used to monitor the standby Router. The timer resets any time a Router in the standby group receives a hello packet from the standby Router. This timer expires in accordance with the hold time value that is set in the respective hello packet.

Hello timer

This timer is used to generate hello packets. All HSRP routers in any HSRP state generate a hello packet when this hello timer expires.

Configure HSRP Timers on Cisco Router

By default, HSRP hellotime is 3 seconds and holdtime is 10 seconds in Cisco Router, which means that failover time could be as much as 10 seconds for clients to start communicating with the new default gateway. In some cases, this interval may be excessive for application support. The hellotime and the holdtime parameters are both configurable. To configure the time between hello messages and the time before other group routers declare the active or standby router to be nonfunctioning, enter this command in interface configuration mode:

Cisco-Router(config)#int fa0/0

Cisco-Router(config-if)#standby 1 timers 3 10

Hellotime : Hello interval in seconds. This is an integer from 1 through 255. The default is 3 seconds.

Holdtime: Time, in seconds, before the active or standby router is declared to be down. This is an integer from 1 through 255. The default is 10 seconds.

 

 

Filed Under: HSRP/VRRP/GLBP

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