Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual page 557

Configuring VSAN Trunking
three switches are allowed-active. However, only the common set of allowed-active VSANs at the ends of
the ISL become operational as shown in below.
Figure 51: Default Allowed-Active VSAN Configuration
You can configure a selected set of VSANs (from the allowed-active list) to control access to the VSANs
specified in a trunking ISL.
Using the figure above as an example, you can configure the list of allowed VSANs on a per-interface basis
(see the following figure). 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.
OL-16597-01
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
About Trunk-Allowed VSAN Lists
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