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HSRP Limited to 16 groups?

The PFC2 supports a maximum of 16 unique Hot Standby Routing Protocol (HSRP) group numbers. You can use the same HSRP group numbers in different VLANs. If you configure more than 16 HSRP groups, this restriction prevents use of the VLAN number as the HSRP group number.

Anyone know any way around this? I have more than 16 vlans that need to have their default gateway participate in these HSRP groups

-Denny

2 REPLIES
Cisco Employee

Re: HSRP Limited to 16 groups?

No way around with Sup2.

http://www.cisco.com/warp/public/473/168.html

It is a hardware limitation of PFC2. PFC3 in Sup720 does not have this limitation

Cisco Employee

Re: HSRP Limited to 16 groups?

The HSRP group is per interface. So let's say you have 20 vlans. Each one can still have a group 1 (for example). The group 1s are not all common HSRP groups so you should be fine.

-denise

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