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HSRP problem

We have some 6009 access switches, dual homed to 2 6509 (with MSFC1) distrbution switches. We have 14 VLANs defined on the switches. All the odd VLANs have distrbution switch 1(DS1) as the root , and all the even VLANs have distrbution 2(DS2) as the root, we are running HSRP between the MSFCs, where also odd VLANs are active on router 1 and even are standby, and even VLANs are active on router 2 and standby on router 1. We have this setup in more than 100 locations. But on one of the location we are getting HSRP flapping, where all the even VLANs go to active state then go back to standby again, that happens on 1 VLAN at a time every couple of hours.. No messages on router 2 or on the DSs.. Here's the log on router 1. You can see from the log that we are getting this message every 1/2 hour, but some time it stops for 7-8 hours. We ran a script to check the utilization on the routers may be we are getting some peaks causing that, but we found no peaks.

Switches are running CatOs 5.4.4

Routers (MSFC) are runnung 12.1.2E

Jul 14 19:33:00.201 EDT: %STANDBY-6-STATECHANGE: Standby: 10: Vlan10 state Standby -> Active

Jul 14 19:33:00.201 EDT: %STANDBY-6-STATECHANGE: Standby: 10: Vlan10 state Active -> Speak

Jul 14 19:33:10.201 EDT: %STANDBY-6-STATECHANGE: Standby: 10: Vlan10 state Speak -> Standby

Jul 14 20:50:58.167 EDT: %STANDBY-6-STATECHANGE: Standby: 12: Vlan12 state Standby -> Active

Jul 14 20:50:58.179 EDT: %STANDBY-6-STATECHANGE: Standby: 12: Vlan12 state Active -> Speak

Jul 14 20:51:08.179 EDT: %STANDBY-6-STATECHANGE: Standby: 12: Vlan12 state Speak -> Standby

Jul 14 21:01:19.293 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Standby -> Active

Jul 14 21:01:19.293 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Active -> Speak

Jul 14 21:01:29.294 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Speak -> Standby

Jul 14 21:16:58.972 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Standby -> Active

Jul 14 21:16:58.972 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Active -> Speak

Jul 14 21:17:08.972 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Speak -> Standby

Jul 14 21:37:41.750 EDT: %STANDBY-6-STATECHANGE: Standby: 8: Vlan8 state Standby -> Active

Jul 14 21:37:41.750 EDT: %STANDBY-6-STATECHANGE: Standby: 8: Vlan8 state Active -> Speak

Jul 14 21:37:51.750 EDT: %STANDBY-6-STATECHANGE: Standby: 8: Vlan8 state Speak -> Standby

Jul 14 22:55:35.215 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Standby -> Active

Jul 14 22:55:35.215 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Active -> Speak

Jul 14 22:55:45.215 EDT: %STANDBY-6-STATECHANGE: Standby: 4: Vlan4 state Speak -> Standby

Jul 14 23:47:33.951 EDT: %STANDBY-6-STATECHANGE: Standby: 14: Vlan14 state Standby -> Active

Jul 14 23:47:33.951 EDT: %STANDBY-6-STATECHANGE: Standby: 14: Vlan14 state Active -> Speak

Jul 14 23:47:43.951 EDT: %STANDBY-6-STATECHANGE: Standby: 14: Vlan14 state Speak -> Standby

Thanks for your help..

2 REPLIES
Cisco Employee

Re: HSRP problem

Cisco Employee

Re: HSRP problem

as usual, HSRP is considered the culprit, because it is the one complaining.

However, I thing your problem is somewhere else than HSRP.

Check if you have packet drops on the router where you see these errors.

Check the CPU.

Try to do ping to a directly connected neighbor at the time of the problem and see if you lose packets.

As a workaround, try to increase the timers.

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