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New Member

HSRP Flapping between 6500's

I have two Cat. 6500's with dual MSFC's. All vlans are running HSRP between MSFC's. Every 4 hours (give of take a couple min) the standby MSFC goes active on all vlans, thus causing a Duplicate Address as the active MSFC never goes into Standby state. Has anyone experienced this type of behavior? Any ideas on how to troubleshoot??

  • Other Network Infrastructure Subjects
3 REPLIES
New Member

Re: HSRP Flapping between 6500's

What kind of link do you have between the two 6500s? If the timers are not configured properly, this problem can occur. Do you search on Cisco's site for HSRP troubleshooting, there are a lot of good answers.

New Member

Re: HSRP Flapping between 6500's

THe link between the two switches are 2 x gig trunks etherchannel. Yes I did a search and read the HSRP case study / troubleshooting doc. which didnt seem to address the issue I am having. What kind of timers should I be looking at?

The impact of the standby going active causes the HSRP to flap thus disrupting traffic.

New Member

Re: HSRP Flapping between 6500's

Do you have a sample of your switch and MSFC config?

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