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Default
All VLANs are mapped to the CIST.
Views
MST region view
Predefined user roles
network-admin
Parameters
instance-id: Specifies an MSTI ID in the range of 0 to 4094. A value of 0 represents the CIST.
The value range for the
instance-id argument is 1 to 4094 for the undo instance command.
vlan vlan-id-list: Specifies a space-separated list of up to 10 VLAN items. Each item
specifies a VLAN or a range of VLANs in the form of
vlan-id1 [ to vlan-id2 ]. The value for
vlan-id2 must be equal to or greater than the value for vlan-id1. The value range for the
vlan-id argument is 1 to 4094.
Usage guidelines
CAUTION:
Use caution with global Digest Snooping in the following situations:
• When you modify the VLAN-to-instance mappings.
• When you restore the default MST region configuration.
If the local device has different VLAN-to-instance mappings than its neighboring devices, loops or
traffic interruption will occur.
If you do not specify any VLANs in the undo instance command, all VLANs mapped to the
specified MSTI are remapped to the CIST.
You cannot map a VLAN to different MSTIs. If you map a VLAN that has been mapped to an MSTI to
a new MSTI, the old mapping is automatically deleted.
You can configure VLAN-to-instance mapping for up to 65 MSTIs.
After configuring this command, run the
active region-configuration command to activate
the VLAN-to-instance mapping.
Examples
# Map VLAN 2 to MSTI 1.
<Sysname> system-view
[Sysname] stp region-configuration
[Sysname-mst-region] instance 1 vlan 2
Related commands
active region-configuration
check region-configuration
display stp region-configuration
region-name
Use region-name to configure the MST region name.
Use
undo region-name to restore the default MST region name.
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