Will this cause loopback problem?

Answered Question
Oct 11th, 2007
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Hi Experts,

I have a question here.

IF Switch A Gi0/1 connected to Router A Gi0/1 and Switch A Gi0/2 connected to Router B Gi0/1 , will they....


cause a loopback when Router A and B are connected to each other for redundancy link through cross-cable??


Thanks..


Correct Answer by Jon Marshall about 9 years 6 months ago

Hi Cindy


Based on the information you have given you should be okay with this setup. We run a similiar setup in our data-centres ( altho we also have redundant switches ).


A loop is usually caused by a router pointong back to the router that has just forwarded on the packet. This should not occur with your setup.


The switch should see 2 equal cost paths to all networks beyond Router A & Router B. Router A will see 2 paths to any network on the switch, one direct through it's connection and one via Router B but the metric should be better for the direct link.


Are you seeing issues in your network ?


Jon

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Correct Answer
Jon Marshall Thu, 10/11/2007 - 01:11
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Hi Cindy


Based on the information you have given you should be okay with this setup. We run a similiar setup in our data-centres ( altho we also have redundant switches ).


A loop is usually caused by a router pointong back to the router that has just forwarded on the packet. This should not occur with your setup.


The switch should see 2 equal cost paths to all networks beyond Router A & Router B. Router A will see 2 paths to any network on the switch, one direct through it's connection and one via Router B but the metric should be better for the direct link.


Are you seeing issues in your network ?


Jon

cindylee27 Thu, 10/11/2007 - 01:32
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Jon,

I am just a bit concern here..;) thanks..


Just wanna to understand looping problem too, and now get a little bit picture out of it..



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