Enabling Or Disabling The Trunking Protocol; About Trunk Mode - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Chapter 15 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
We recommend that both ends of a trunking ISL belong to the same port VSAN. On certain platforms or
Note
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
Tip
disabling the trunking protocol.
This section explains how to configure trunking and contains the following topics:
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Enabling or Disabling the Trunking Protocol

To enable or disable the trunking protocol, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# no trunk protocol enable
switch(config)#
switch(config)# trunk protocol enable
switch(config)#

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 configuration at the two ends of an ISL,
between two switches, determine the trunking state of the link and the port modes at both ends (see
Table
Table 15-1
Your Trunk Mode Configuration
Switch 1
On
Off
Auto
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Enabling or Disabling the Trunking Protocol, page 15-3
About Trunk Mode, page 15-3
Configuring Trunk Mode, page 15-4
About Trunk-Allowed VSAN Lists, page 15-4
Configuring an Allowed-Active List of VSANs, page 15-6
15-1).
Trunk Mode Status Between Switches
Switch 2
Auto or on
Auto, on, or off
Auto
Purpose
Enters configuration mode.
Disables the trunking protocol.
Enables trunking protocol (default).
Resulting State and Port Mode
Trunking State
Trunking (EISL)
No trunking (ISL)
No trunking (ISL)
Cisco MDS 9000 Family CLI Configuration Guide
Trunking Protocol
Port Mode
TE port
E port
E port
15-3