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Posts: 1
Registered: ‎06-14-2005

ISL question

Hello everybody:

Occasional Contributor
Posts: 14
Registered: ‎02-03-2004

Re: ISL question

I'm not sure where to info on that, but what you need to look out for when using ISL's is the length of the ISL. If you take a close look at your switch ports you will notice that they are broken up into sets of four, these are called quads. Each quad has a limited number buffer to buffer (BB) credits to share across all four port. Therefore if the ISL requires all BB credits then the other three ports in the quad essentially become useless. You could still plug into the other three ports but your preformance could suffer.Duane

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