H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 185)

22-16
Configuration Prerequisites
The role (root, branch, or leaf) of each device in each spanning tree instance is determined.
Configuring an MST Region
Configuration procedure
Follow these steps to configure an MST region:
To do… Use the command… Remarks
Enter system view system-view —
Enter MST region view stp region-configuration —
Configure the name of the MST
region
region-name name
Required
The default MST region name of a
device is its MAC address.
instance instance-id vlan vlan-list
Configure the VLAN mapping table
for the MST region
vlan-mapping modulo modulo
Required
Both commands can be used to
configure VLAN mapping tables.
By default, all VLANs in an MST
region are mapped to spanning
tree instance 0.
Configure the MSTP revision level
for the MST region
revision-level level
Required
The default revision level of an
MST region is level 0.
Activate the configuration of the
MST region manually
active region-configuration Required
Display the configuration of the
current MST region
check region-configuration Optional
Display the currently valid
configuration of the MST region
display stp region-configuration
You can execute this command in
any view.
NTDP packets sent by devices in a cluster can only be transmitted within the instance where the
management VLAN of the cluster resides.
Configuring MST region-related parameters (especially the VLAN mapping table) results in spanning
tree recalculation and network topology jitter. To reduce network topology jitter caused by the
configuration, MSTP does not recalculate spanning trees immediately after the configuration; it does
this only after you perform one of the following operations, and then the configuration can really takes
effect:
z
Activate the new MST region-related settings by using the active region-configuration command
z
Enable MSTP by using the stp enable command