HP Cisco MDS 9216 - Fabric Switch Configuration Manual page 479

Chapter 24 Configuring Trunking
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
In Figure
VSANs 1, 2, 4, and 5 with a default configuration of trunk-allowed VSANs. All VSANs configured in
all 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
Figure 24-6
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
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 shall include VSAN 1 and VSAN 3.
• The ISL between switch 2 and switch 3 shall include VSAN 1 and VSAN 2.
• The ISL between switch 3 and switch 1 shall include VSAN 1, 2, and 5.
Consequently, VSAN 2 can only be routed from switch 1 through switch 3 to switch 2.
OL-16184-01, Cisco MDS SAN-OS Release 3.x
24-6, switch 1 has VSANs 1 through 5, switch 2 has VSANs 1 through 3, and switch 3 has
Default Allowed-Active VSAN Configuration
Figure 24-6 as an example, you can configure the list of allowed VSANs on a per-interface basis
Figure 24-7). For example, if VSANs 2 and 4 are removed from the allowed VSAN list of ISLs
Figure 24-6.
Switch 2
VSAN1
VSAN2
VSAN3
Switch 3
VSAN1
VSAN2
VSAN4
VSAN5
Cisco MDS 9000 Family CLI Configuration Guide
Trunking Protocol
24-5