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Old 04-15-2015, 07:37 PM   #1
noamb
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is spanning tree sufficient?


Hey folks,

I'm planning the redundant setup diagrammed here:

https://www.flickr.com/photos/23741183@N02/17160637602/

The routers are Watchguard and the switches are Brocade. The routers have high-availability and failover built-in, that's not a problem. In order to attain the redundancy I'm hoping in the switching, do I need to set up anything besides spanning tree?

Thanks!
 
Old 04-16-2015, 08:07 AM   #2
sudowtf
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So we know spanning-tree will disable a port that caused a loop. So, I suppose the question is would spanning tree automatically re-enable the port(s) it has disabled upon an opposing switch failure, and if so how quick.

Diagram looks good assuming that is brocade's recommended way of stacking. I mostly see stacks with stacking cables on the back, not on the ports. (But i have no experience with, nor have seen Brocade switches specifically)

Last edited by sudowtf; 04-16-2015 at 08:09 AM.
 
Old 04-16-2015, 06:22 PM   #3
wildwizard
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Quote:
Originally Posted by sudowtf View Post
Diagram looks good assuming that is brocade's recommended way of stacking. I mostly see stacks with stacking cables on the back, not on the ports. (But i have no experience with, nor have seen Brocade switches specifically)
I've seen it before, if you want to make a stack without proper stackable switches and they have SFP ports you use them instead to connect them together leaving the normal ports for regular devices.

What is really important with Spanning Tree is you need to look at a diagram of how the tree will look once it prunes the surplus links.

You might have the switches linked via 10GB ports but Spanning tree may decide to prune those links and use the ones via the routers instead.

ie You need to configure Spanning tree properly or your network will run like crap.
 
  


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