Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 334)

tagged ethe 1 to 2
no spanning tree
!
vlan 20 by port <----- VLAN 20 configuration
tagged ethe 1 to 2
no spanning-tree
!
mstp scope all
mstp instance 0 vlan 1
mstp instance 1 vlan 20
mstp start
some lines ommitted for brevity...
device(config-vlan-20)#no vlan 20 <----- VLAN 20 deleted
device(config-vlan-20)#show run
Current configuration:
!
ver 04.2.00bT3e1
!
!
vlan 1 name DEFAULT-VLAN by port
no spanning-tree
!
vlan 10 by port
tagged ethe 1 to 2
no spanning-tree
!
mstp scope all
mstp instance 0 vlan 1
mstp instance 1 vlan 10
mstp instance 1 vlan 20 <----- VLAN to MSTI mapping kept in
mstp start running configuration, even though
VLAN 20 was deleted
some lines ommitted for brevity...
Deleting a VLAN to MSTI mapping
You can optionally remove a VLAN to MSTI mapping using the no mstp instance command. To do
so, enter a command such as the following.
device(config)#no mstp instance 7 vlan 4 to 7
This command deletes the VLAN to MSTI mapping from the running configuration and triggers an
MSTP reconvergence.
Syntax: [no] mstp instance instance-number vlan vlan-id | vlan-group group-id]
The instance parameter defines the number for the instance of MSTP that you are deleting.
The vlan parameter identifies one or more VLANs or a range of VLANs to the instance defined in this
command.
The vlan-group parameter identifies one or more VLAN groups to the instance defined in this
command.
Viewing the MSTP configuration digest
The MSTP Configuration Digest indicates the occurrence of an MSTP reconvergence. The
Configuration Digest is recalculated whenever an MSTP reconvergence occurs. To view the
Configuration Digest, use the show mstp config command. The following shows an example output.
Brocade (config-vlan-20)# show mstp config
MSTP CONFIGURATION
------------------
Scope : all system
Name :
Revision : 0
Deleting a VLAN to MSTI mapping
334 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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