Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)

Configuring VSAN Trunking
Guidelines and Restrictions
When configuring VSAN trunking, note the following guidelines:
• We recommend that both ends of a VSAN trunking ISL belong to the same port VSAN. On platforms
or fabric switches where the port VSANs are different, one end returns an error, and the other is not
connected.
• To avoid inconsistent configurations, disable all E ports with a shutdown command before enabling or
disabling the VSAN trunking protocol.
Enabling or Disabling the VSAN Trunking Protocol
To enable or disable the VSAN trunking protocol, perform this task:
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configuration terminal
Step 1
Disables the trunking protocol.switch(config)# no trunk protocol enable
Step 2
Enables trunking protocol (default).switch(config)# trunk protocol enable
Step 3
About Trunk Mode
By default, trunk mode is enabled in all Fibre Channel interfaces. However, trunk mode configuration takes
effect only in E-port mode. You can configure trunk mode as on (enabled), off (disabled), or auto (automatic).
The default trunk mode is on. The trunk mode configurations at the two ends of the link determine the trunking
state of the link and the port modes at both ends (see the following table).
Table 68: Trunk Mode Status Between Switches
Resulting State and Port ModeYour
Trunk
Mode
Configuration
Port ModeTrunking StateSwitch 2Switch 1
TE portTrunking (EISL)Auto or onOn
E portNo trunking (ISL)Auto, on, or offOff
E portNo trunking (ISL)AutoAuto
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
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Configuring VSAN Trunking
Configuring VSAN Trunking