Friday, August 28, 2009

Fabric merges

When doing a fabric merge with Brocade gear, when they say that the Zone configuration needs to be exactly the same on both switches, they mean that. The merge process does no parsing, it just compares the zone config. If the metaphorical diff returns anything it doesn't merge. So if one zone has a swapped order of two nodes but is otherwise identical, it'll not merge.

Yes, this is very conservative. And I'm glad for it, since failure here would have brought down our ESX cluster and that's a very wince-worthy collection of highly visible services. But it took a lot of hacking to get the config on the switch I'm trying to merge into the fabric to be exactly right.

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