Spanning Tree, Aggregated Ethernet, or Fail-Over on 6500

ehartsocPU · ‎09-30-2010

My office is connected via Bridgeway 1Gbps microwave to another location, which becomes unusable during heavy rain/snow. The backup connection is a 25 meg Tsunami link that is able to better handle the interference. What do you think would be the best method of providing seemless redundancy between the two on a 6500 switch?

Thanks in advance,

Eric

andrew.prince · ‎09-30-2010

You could either do this @ layer 2 and or 3.

What I would consider is using a method that uses either a keepalive or response test to make sure the link is there. The other issue you have is stability - you don't want the link flapping all the time, so you can either use interface/route dampning. With layer 2 you need to be mindful of port state transistions on span-tree unless you use 802.1w

What routing protocols do you run if any? What span-tree are you currently using?

HTH>