Fibre Channel (SAN)

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New Contributor
Posts: 2
Registered: ‎01-20-2005

ISL Problems between 3900 Switches

I have two separate fabrics, each consisting of a 3800 & 3900. I now wish to add an additional 3900 to each fabric.

Regular Contributor
Posts: 178
Registered: ‎08-08-2003

Re: ISL Problems between 3900 Switches

How are you adding the switch to the fabric? Are you just plugging them in while they are both turned on? If so, try turning the new switch off, plug it in to the existing fabric, and then power it up. I have had some quirky problems with adding switches to fabrics, but that has always worked for me. Hope this helps...

New Contributor
Posts: 2
Registered: ‎01-20-2005

Re: ISL Problems between 3900 Switches

I found the solution, but don't quite understand. On the original switches Fabric Ops Mode, Extended distance was set to 1 (On) although the swithes were in the same rack.I had to set Extended fabric to 1 on all three switches before they would combine. Interestingly only one switch had the extended fabric license

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