Configuring Mstp; Configuring An Mst Region - 3Com 4500G Family Configuration Manual

Configuring MSTP

Configuring an MST Region

Make the following configurations on the root bridge and on the leaf nodes separately.
Follow these steps to configure an MST region:
To do...
Enter system view
Enter MST region view
Configure the MST region
name
Configure the
VLAN-to-instance mapping
table
Configure the MSTP
revision level of the MST
region
Display the MST region
configurations that are not
activated yet
Activate MST region
configuration manually
Display the configurations
of currently activated MST
regions
Two or more MSTP-enabled 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, the same
VLAN-to-instance mapping entries in the MST region and the same MST region revision level, and
they are interconnected via a physical link.
The configuration of MST region–related parameters, especially the VLAN-to-instance mapping
table, will cause MSTP to launch a new spanning tree calculation process, which may result in
network topology instability. To reduce the possibility of topology instability caused by configuration,
MSTP will not immediately launch a new spanning tree calculation process when processing MST
region–related configurations; instead, such configurations will take effect only after you activate
the MST region–related parameters using the active region-configuration command, or enable
MSTP using the stp enable command in the case that MSTP is not enabled.
Use the command...
system-view
stp region-configuration
region-name name
instance instance-id vlan vlan-list
vlan-mapping modulo modulo
revision-level level
check region-configuration
active region-configuration
display stp region-configuration
1-17
Remarks
—
—
Optional
The MST region name is the
MAC address by default.
Optional
Use either command.
All VLANs in an MST region
are mapped to MSTI 0 by
default.
Optional
0 by default
Optional
Required
The display command can
be executed in any view.