Connecting two MDS switches at site A to two MDS switches at site B

Unanswered Question
Nov 17th, 2009

Quick design question as new to MDS switches.

We are looking in purchasing 4 9509 switches. 2 at site A, 2 at site B.

How would we connect the switches across the two sites using two LES1000 links?

Would we create a virtual port-channel between the switches like you can on the Nexus 7000.


I have this problem too.
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chriswalden Fri, 12/04/2009 - 11:29

LES1000, can you offer more details?  Assuming that what you have is a Gigabit Ethernet link between sites.  If so, you'll need to create FC-IP tunnels between sites.  For that, you'll need something like the MSM (multi-services module) that has 18 FC ports and four Gig-E IP Services ports.

Check the config guides and the cookbook for more details on IP services and FC-IP tunnels.

Michael Brown Fri, 12/04/2009 - 12:07

Correct...if the link is IP between the sites, you need to use the modules with the GE ports.  You can still create multiple FCIP tunnels and then create a port channel of those links.  If the link is dark fibre and the connection will be pure fibre channel, you can create a port channel of multiple fibre channel ISLs.

Remember, the best practice when building port channels is to use links on different modules to avoid a module failure from killing the entire port channel.

Hope this helps,



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