instance
Use instance to map a list of VLANs to an MSTI.
Use undo instance to remap the specified VLAN or all VLANs to the CIST (MSTI 0).
Syntax
instance instance-id vlan vlan-id-list
undo instance instance-id [ vlan vlan-id-list ]
Default
All VLANs are mapped to the CIST.
Views
MST region view
Predefined user roles
network-admin
mdc-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:
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