instance vlan

Function

The instance vlan command maps a VLAN or VLAN range to a Multiple Spanning Tree Instance (MSTI).

The undo instance vlan command deletes the mapping between a VLAN or VLAN range and an MSTI.

By default, all VLANs are mapped to Common and Internal Spanning Tree (CIST), namely, instance 0.

Format

instance instance-id vlan { vlan-id1 [ to vlan-id2 ] } &<1-10>

undo instance instance-id [ vlan { vlan-id1 [ to vlan-id2 ] } &<1-10> ]

Parameters

Parameter	Description	Value
instance-id	Specifies the ID of an MSTI.	The value is an integer ranging from 0 to 4094, Value 0 indicates CIST. <instanceId> specified in the undo instance command cannot be 0, that is, instance 0 cannot be deleted.
vlan-id1	Specifies the start VLAN ID to be mapped to an MSTI.	The value is an integer ranging from 1 to 4094.
to vlan-id2	Specifies the end VLAN ID to be mapped to an MSTI.	The value is an integer ranging from 1 to 4094. <vlanIdEnd> must be greater than <vlanIdBegin>.

Parameter

Description

Value

instance-id

Specifies the ID of an MSTI.

The value is an integer ranging from 0 to 4094, Value 0 indicates CIST.

<instanceId> specified in the undo instance command cannot be 0, that is, instance 0 cannot be deleted.

vlan-id1

Specifies the start VLAN ID to be mapped to an MSTI.

The value is an integer ranging from 1 to 4094.

to vlan-id2

Specifies the end VLAN ID to be mapped to an MSTI.

The value is an integer ranging from 1 to 4094. <vlanIdEnd> must be greater than <vlanIdBegin>.

Views

MSTP process region view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mstp	write

Usage Guidelines

Usage Scenario

MSTP divides a switching network into multiple regions, each of which has independent Multiple Spanning Trees. Each spanning tree is called an MSTI, and each region is called a Multiple Spanning Tree (MST) region. Two devices belong to the same MST region only when their following configurations are the same:

MST region name
Mappings between MSTIs and VLANs
MST region revision level
To map a VLAN or VLAN range to an MSTI, run the instance command.

Configuration Impact

When using the undo instance command, note the following points:

After the mapping between specified VLANs and a specified MSTI is deleted, these VLANs will be mapped to CIST, namely, instance 0.
If no VLAN is specified, all VLANs that have established mappings with an MSTI are mapped to CIST.
If the instance command is run more than once, all configurations take effect.

Precautions

A VLAN cannot be mapped to different MSTIs. If the instance command is run more than once, the latest configuration overrides the previous one.

Example

# Map VLAN 2 to MSTI 1.

<HUAWEI> system-view
[~HUAWEI] stp process 1
[~HUAWEI-mst-process-1] stp region-configuration
[~HUAWEI-mst-process-1-region] instance 1 vlan 2