05-24-2011 07:52 AM
I have two Brocade switches running "free standing", ie providing independent paths between storage and hosts. At present, the two switches do not "know" about each other.
My question is this: "What do I gain by adding one or more ISL links between the two switches?"
(eg performance, resilience, ease of zone mgmt ...)
05-24-2011 08:28 AM
You loose resillience,because you have a single zoning DB. Now you have two. In case of a single zoning error you will break the entire fabric/SAN.
You will not get more performance because you will have not more paths. I assume you have a proper zoning in place at both switches.
You will win at the zoning management point because you need only a single session. Currently you need two sessions in a dual fabric.
It is best practice to have two fabrics.
By the way. If you have 100% locality between server and storage ports you can not see any data traffic on the ISLs.
Which means that they are useless.
I hope this helps,