Command Manual – STP 
Quidway S8500 Series Routing Switches  Chapter 1  
MSTP Configuration Commands
 
Huawei Technologies Proprietary 
1-44 
1.1.43  vlan-mapping modulo 
Syntax 
vlan-mapping modulo modulo 
undo vlan-mapping modulo 
View 
MST region view 
Parameter 
modulo: Specifies the modulus, ranging from 1 to 48.  
Description 
Use the vlan-mapping modulo command to map fast and symmetrically all VLAN lists 
to the specified MSTIs according to the modulo operation results. 
Use the undo vlan-mapping modulo command to disable the function. 
By default, all the VLANs are mapped to CIST, namely Instance 0.  
Related command: region-name,  revision-level,  check region-configuration, 
active region-configuration 
Example 
# Map VLAN to MSTI based on modulo 16.  
<Quidway>system-view 
System View: return to User View with Ctrl+Z. 
[Quidway]stp region-configuration 
[Quidway-mst-region] vlan-mapping modulo 16