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09/17/2009 at 10:24AM PDT, ID: 24740659
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7.8

IVR transit VSANs - Cases for use

Asked by carnesc in Network Design & Methodology, Storage Technology, Hard Drives & Storage

Tags: san design, vsan, ivr, zoning, zone, permissions, fabric isolation, fabric redundancy, high availability, cisco, mds, 9222i

Hi there folks,

I am trying to wrap my head around when and when not to use transit VSANs. Consider a single Cisco MDS 9222i fibre channel switch and two endpoints, a file server and a tape library. The file server is in VSAN 2 and the tape library is in VSAN 10. These need to talk, and IVR zoning is the only way to do that across VSANs.

When I try to set up the IVR zone set, I am prompted for a mandatory 'transit VSAN' by Cisco Fabric Manager. In the documentation, however, there is a statement that makes me wonder if it is needed in my case. The doc states, "When the source and destination edge VSANs are adjacent to each other, a transit VSAN is not required between them."

Two questions:
1. Is a transit VSAN needed in the above IVR scenario or not?
2. When creating IVR transit VSANs in general, when is it advisable to use more than one?
(Seems to me like creating a bunch of VSANs but then using only one transit VSAN for all cross talk kind of puts your eggs back in one basket. If there is a problem with that transit VSAN, all inter-VSAN traffic stops, yet all the examples I see in Cisco documentation use a single transit VSAN.)

Thanks for any advice.
[+][-]09/18/09 02:19 AM, ID: 25364068

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[+][-]09/19/09 07:42 PM, ID: 25375703

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About this solution

Zones: Network Design & Methodology, Storage Technology, Hard Drives & Storage
Tags: san design, vsan, ivr, zoning, zone, permissions, fabric isolation, fabric redundancy, high availability, cisco, mds, 9222i
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Solution Provided By: carnesc
Participating Experts: 2
Solution Grade: A
 
 
[+][-]09/20/09 04:12 AM, ID: 25376715

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[+][-]09/22/09 03:30 PM, ID: 25398193

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[+][-]10/02/09 01:13 PM, ID: 25481657

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