H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 67)

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Configuring an MST region
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 MST region name region-name name
Optional
The MST region name is the MAC
address by default.
Configure the VLAN-to-instance
mapping table
instance instance-id vlan vlan-list
Optional
Use either command.
All VLANs in an MST region are
mapped to the CIST (or MSTI 0) by
default. vlan-mapping modulo modulo
Configure the MSTP revision level
of the MST region
revision-level level
Optional
0 by default.
Display the MST region
configurations that are not
activated yet
check region-configuration Optional
Activate MST region configuration
manually
active region-configuration Required
Display the activated configuration
information of the MST region
display stp region-configuration [ |
{ begin | exclude | include }
regular-expression ]
Optional
Available in any view.
NOTE:
•
Two or more spanning tree devices belong to the same MST region only if they are configured to have
the same format selector (0 by default, not configurable), MST region name, MST region revision level,
and the same VLAN-to-instance mapping entries in the MST region, and they are interconnected via a
physical link.
• The configuration of MST region–related parameters, especially the VLAN-to-instance mapping table,
will result in a new spanning tree calculation. To reduce the possibility of topology instability, the MST
region configuration takes effect only after you activate it by using the active region-configuration
command, or enable a spanning tree protocol by using the stp enable command in the case that the
spanning tree protocol is disabled.
Configuring the root bridge or a secondary root bridge
The root bridge of a spanning tree is determined through spanning tree calculation. Alternatively, you
can specify the current device as the root bridge or a secondary root bridge.
A device has independent roles in different spanning trees. It can act as the root bridge in one spanning
tree and as a secondary root bridge in another. However, a device cannot be the root bridge and a
secondary root bridge in the same spanning tree.