Command Manual – STP 
Quidway S8500 Series Routing Switches  Chapter 1  
MSTP Configuration Commands
 
Huawei Technologies Proprietary 
1-9 
 Description 
Use the instance command to map the specified VLAN list to the specified MSTI. 
Use the undo instance command to cancel the specified VLAN list from the specified 
MSTI, and the removed VLAN will then be mapped to the CIST (i.e., the Instance 0). If 
no VLAN is specified in the undo command, all the VLANs associated with the 
specified MSTI will be mapped to CIST.  
By default, all the VLANs are mapped to CIST, i.e., the Instance 0.  
MSTP describes the association between VLANs and MSTIs with the VLAN mapping 
table. You can use this command to configure this table. Every VLAN can be mapped to 
an MSTI as per your configuration.  
You cannot map one VLAN to different instances, while you can map multiple VLANs to 
one instance. When you remap the mapped VLAN to a different instance, the original 
mapping relation is removed automatically. The mapping relationship of VLANs and 
instances in the same MSTP domain must be correct. The data will be transmitted 
according to the spanning tree topology structure of the instance the VLAN maps to.  
Related command: region-name, revision-level,  check region-configuration, 
vlan-mapping modulo, active region-configuration. 
Example 
# Map VLAN 2 to MSTI 1. 
<Quidway>system-view 
System View: return to User View with Ctrl+Z. 
[Quidway]stp region-configuration  
[Quidway-mst-region] instance 1 vlan 2 
# Map VLAN5-10 to MSTI 3. 
[Quidway-mst-region] instance 3 vlan 5 6 7 8 9 10  
1.1.8  region-name 
Syntax 
region-name name 
undo region-name 
View 
MST region view 
Parameter 
name: Specifies the MST region name of the switch with a character string not 
exceeding 32 bytes.