Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual page 451

Chapter 16 Configuring Trunking
D r a f t Ve r s i o n 3 - 0 3 D e c 2 0 0 8 - C i s c o C o n f i d e n t i a l
Figure 16-5
Switch 1
VSAN1
VSAN2
VSAN3
VSAN4
VSAN5
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
(see Figure
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.
OL-18084-01, Cisco MDS NX-OS Release 4.x
Default Allowed-Active VSAN Configuration
Figure 16-5 as an example, you can configure the list of allowed VSANs on a per-interface basis
16-6). For example, if VSANs 2 and 4 are removed from the allowed VSAN list of ISLs
Configuring Trunk Mode and VSAN List
Switch 2
VSAN1
VSAN2
VSAN3
Switch 3
VSAN1
VSAN2
VSAN4
VSAN5
Cisco MDS 9000 Family CLI Configuration Guide
16-11