Solved: setting the hold down timer in vrrp on backup routers - Cisco Community

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hi every body!

Is there any command to setting the hold down timer on backup router in vrrp?

thanks a lot!

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You won't find much documentation within Cisco for VRRP for obvious reasons, thus I'm going to refer you to a third party book:

http://books.google.com/books?id=DRIryrLoxKkC&pg=PA535&lpg=PA535&dq=vrrp+hold+down+timer&source=web&ots=SGHqFrQTR7&sig=JGYecBDcke4-RUI1AavR82wawJA&hl=en&sa=X&oi=book_result&resnum=2&ct=result

In short, the VRRP hold down timer is not configurable and it equals 3 times to advertisement interval.

HTH,

__

Edison.

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For example, if i configure the vrrp advertisement interval to be 2 sec, it will set the master-down timer to 6 seconds. Is it correct?

Yes.

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Hi Sarah,

It roughly (advertisement int x 3) + 0.6 secs

eg: if the interval is 2 secs, holdtime is approx 6.6 secs .

You can see this in the example here.

http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=LAN%2C%20Switching%20and%20Routing&topicID=.ee71a04&fromOutline=&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.2cc2d7d9

HTH

Lejoe

View solution in original post

4 Replies 4

You won't find much documentation within Cisco for VRRP for obvious reasons, thus I'm going to refer you to a third party book:

http://books.google.com/books?id=DRIryrLoxKkC&pg=PA535&lpg=PA535&dq=vrrp+hold+down+timer&source=web&ots=SGHqFrQTR7&sig=JGYecBDcke4-RUI1AavR82wawJA&hl=en&sa=X&oi=book_result&resnum=2&ct=result

In short, the VRRP hold down timer is not configurable and it equals 3 times to advertisement interval.

HTH,

__

Edison.

Thanks a lot Edison!

In hsrp, the hello time is 3 sec and hold down timer could be set to any value from 1-255 seconds, but recommended value is 3 times the hello.

In Vrrp, we don't have that choice,rather setting the vrrp advertisements interval also set the master down timer.

For example, if i configure the vrrp advertisement interval to be 2 sec, it will set the master-down timer to 6 seconds. Is it correct?

thanks a lot!

For example, if i configure the vrrp advertisement interval to be 2 sec, it will set the master-down timer to 6 seconds. Is it correct?

Yes.

Hi Sarah,

It roughly (advertisement int x 3) + 0.6 secs

eg: if the interval is 2 secs, holdtime is approx 6.6 secs .

You can see this in the example here.

http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=LAN%2C%20Switching%20and%20Routing&topicID=.ee71a04&fromOutline=&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.2cc2d7d9

HTH

Lejoe

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