Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

3750 Stack Master Re-election

We are running through some test scenarios before deploying a 3750 stack into production.

The only issue we have really run into is when we physically lose the stack master, i.e. pulling the plug. Our default gateway is on a core switch. When we unplug the stackmaster, all local layer 2 traffic on the stack comes right back up.

But we cannot get to the default gateway for 45 seconds. Basically I guess the re-election is happening in the background...or I could be wrong.

Anyway, am I looking at the right thing or should I be looking somewhere else, or is that just how it is.

I say 45 seconds because we can replicate the situation on demand and the results are the same everytime.

Thanks in advance

New Member

Re: 3750 Stack Master Re-election

When I have tested a stack master failure I have seen outages of about 25-34 seconds. I believe it is stack ring negotiation which is going on.

Have you set the stack priority in a determined order such as 15,14,13,12,11...?

New Member

Re: 3750 Stack Master Re-election

Yes, I have. If you have seen an extended period then that helps some to at least know it takes some time. I just wanted to make sure I was not missing some hidden paramater or something.

Thank You