instance

Syntax

instance instance-id vlan vlan-list

undo instance instance-id [ vlan vlan-list ]

View

MST region view

Default level

2: System level

Parameters

instance-id: Specifies an MSTI ID. The minimum value is 0, representing the CIST.

• In MSTP mode, the instance-id argument ranges from 0 to 16.

• In PVST mode, the instance-id argument ranges from 0 to 16.

vlan vlan-list: Specifies a VLAN list in the format of vlan-list = { vlan-id [ to vlan-id ] }&<1-10>, where the vlan-id argument represents the VLAN ID, in the range of 1 to 4094, and &<1-10> indicates that you can specify up to 10 VLAN IDs or VLAN ID ranges.

Description

Use instance to map a list of VLANs to the specified MSTI.

Use undo instance to remap the specified VLAN or all VLANs to the CIST (MSTI 0).

By default, all VLANs are mapped to the CIST.

If you specify no VLAN in the undo instance command, all VLANs mapped to the specified MSTI will be remapped to the CIST.

You cannot map the same VLAN to different MSTIs. If you map a VLAN that has been mapped to an MSTI to a new MSTI, the old mapping will be automatically removed.

In PVST mode, you can map multiple VLANs to the CIST, and only one VLAN to each remaining MSTI.

After configuring this command, run the active region-configuration command to activate the VLAN-to-instance mapping.

Related commands: display stp region-configuration, check region-configuration, and active region-configuration.

Examples

# Map VLAN 2 to MSTI 1.

<Sysname> system-view
[Sysname] stp region-configuration
[Sysname-mst-region] instance 1 vlan 2