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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 5 Configuring Trunking
Information About Trunking
Figure 5-3 Default Allowed-Active VSAN Configuration
You can configure a select set of VSANs (from the allowed-active list) to control access to the VSANs
specified in a trunking ISL.
Using Figure 5-3 as an example, you can configure the list of allowed VSANs on a per-interface basis
(see Figure 5-4). For example, if VSANs 2 and 4 are removed from the allowed VSAN list of ISLs
connecting to switch 1, the operational allowed list of VSANs for each ISL would be as follows:
• The ISL between switch 1 and switch 2 includes VSAN 1 and VSAN 3.
• The ISL between switch 2 and switch 3 includes VSAN 1 and VSAN 2.
• The ISL between switch 3 and switch 1 includes VSAN 1, 2, and 5.
Consequently, VSAN 2 can only be routed from switch 1 through switch 3 to switch 2.
V
SANs1, 2, and 3 are o
perational.
VSANs 1, 2, 4, 5areoperationa
l.
VSANs 1 and 2 are operational.
Switch 3
VSAN1
VSAN2
VSAN4
VSAN5
Switch 1
VSAN1
VSAN2
VSAN3
VSAN4
VSAN5
Switch 2
VSAN1
VSAN2
VSAN3
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