Isl going down

Unanswered Question
Apr 16th, 2012

Folks,

           One of my customers has  9513 mds and many blade chaotic cisco fc switches (IBM) . He has about 3500 zones in a zone set which is being fully distributed . He keeps getting memory errors when he makes the change to a zone set and tries to activate it . He is running sanos . Are there any recommendation that might assist him .

I have this problem too.
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maminhas Mon, 04/16/2012 - 17:11

MDS switch offers 8000 zones per switch with 16,000 zone members per physical fabric (includes all VSANs)

Please refer to configuration limit guide.

http://www.cisco.com/en/US/docs/switches/datacenter/mds9000/sw/nx-os/configuration/guides/limits/limits_42x.html

Zone Member Configuration Guidelines are even more important to optimize the resource usage on the switch.

Zone config best practice clearly indicates:

"The best practice is to avoid configuring large number of targets and or or large numbers of initiators in a single zone. Such configuration wastes switch resources by provisioning and managing many communicating pairs (initiator-to-initiator or target-to-target) which will never actually communicate with each other. For this reason, single initiator with a single target is the most efficient approach to zoning."

The following guidelines must be considered when creating zone members:

•Configuring only one initiator and one target for a zone provides most efficient use of the switch resources.

•Configuring the same initiator to multiple targets is accepted.

•Configuring multiple initiators to multiple targets is not recommended.

http://www.cisco.com/en/US/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/zone.html#wp1967293

If the zone activation or changes run into issues off and on..quite possibly the zoning configuration best practices could be lacking.

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Posted April 16, 2012 at 2:08 PM
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