Trunking Configuration Guidelines - Cisco DS-C9216I-K9 Configuration Manual

Trunking Configuration Guidelines

Figure 13-3
Switch 1
VSAN1
VSAN2
VSAN3
VSAN4
VSAN5
In Figure
•
•
•
Consequently, VSAN 2 can only be routed from switch 1 through switch 3 to switch 2.
Trunking Configuration Guidelines
If you misconfigure VSAN configurations across E ports, you could face consequences such as merging
the traffic in two VSANs (thus causing both VSANs to mismatch). The trunking protocol validates the
VSAN interfaces at both ends of an ISL to avoid VSANs merging. (See
Figure 13-4
In Figure
Cisco MDS 9000 Fabric Manager Switch Configuration Guide
13-4
Operational and Allowed VSAN Configuration
13-3, the operational allowed list of VSANs between switches is as follows:
Switch 1 and switch 2 include VSAN 1 and VSAN 3.
Switch 2 and switch 3 include VSAN 1 and VSAN 2.
Switch 3 and switch 1 include VSAN 1, 2, and 5.
VSAN Mismatch
Switch 1
Isolated
E port
VSAN 2
VSAN mismatch
13-4, the trunking protocol detects potential VSAN merging and isolates the ports involved.
Switch 2
VSAN1
VSAN2
VSAN3
Switch 3
VSAN1
VSAN2
VSAN4
VSAN5
Switch 2
E port
VSAN 3
Chapter 13 Configuring Trunking
Figure 13-4.)
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