Cisco DS-C9216I-K9, Руководство по настройке

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16-3
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
OL-7753-01
Chapter 16 Configuring Inter-VSAN Routing
IVR Guidelines
IVR Guidelines
Before configuring an IVR SAN fabric, consider the following guidelines:
•
Configure unique domain IDs across all VSANs and switches participating in IVR operations. The
following switches participate in IVR operations:
– All edge switches in the edge VSANs (source and destination)
–
All switches in transit VSANs
• Configure IVR only in the relevant border switches.
•
An Enterprise License Package is required for this feature.
If you change any FSPF link cost, ensure that the FSPF path distance (that is, the sum of the link costs
on the path) of any IVR path is less than 30,000.
IVR-enabled VSANs must be configured in no interop (default) mode or interop 1 mode.
Domain ID Guidelines
Domain IDs must be unique across inter-connected VSANs. To ensure unique domain IDs across
inter-connected VSAN, follow these guidelines:
•
Minimize the number of switches that require a domain ID assignment. This ensures minimum
traffic disruption.
• Minimize the coordination between interconnected VSANs, when configuring the SAN for the first
time, as well as when you add each new switch.
Transit VSANs Guidelines
Consider the following guidelines for transit VSANs:
• Besides defining the IVZ membership, you can choose to specify a set of transit VSANs to provide
connectivity between two edge VSANs:
–
If two edge VSANs in an IVZ overlap, then a transit VSAN is not required (though, not
prohibited) to provide connectivity.
– If two edge VSANs in an IVZ do not overlap, you may need one or more transit VSANs to
provide connectivity. Two edge VSANs in an IVZ will not overlap if IVR is not enabled on a
switch that is a member of both the source and destinations edge VSANs.
•
Traffic between the edge VSANs only traverses through the shortest IVR path.
• Transit VSAN information is common to all IVZs. Sometimes, a transit VSAN can also double-up
as an edge VSAN in another IVZ.
Border Switch Guidelines
Before configuring border switches, consider the following guidelines:
• Border switches require SAN-OS Release 1.3(1) or higher.
•
A border switch must be a member of two or more VSANs.
• A border switch that facilities IVR communications must be IVR enabled.