Configuring Root Bridge; Configuring An Mst Region - 3Com E4500-24 Cli Configuration Manual

Configuring Root Bridge

Configuring an MST Region

Configuration procedure
Follow these steps to configure an MST region:
To do...
Enter system view
Enter MST region view
Configure the name of the MST
region
Configure the VLAN-to-instance
mapping table for the MST region
Configure the MSTP revision
level for the MST region
Activate the configuration of the
MST region manually
Display the configuration of the
current MST region
Display the currently valid
configuration of the MST region
Neighbor Topology Discovery Protocol (NTDP) packets sent by devices in a cluster can only be
transmitted within the MSTI where the management VLAN of the cluster resides. For more information
about clusters and the NTDP protocol, see Cluster Operation.
Configuring MST region-related parameters (especially the VLAN-to-instance 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:
Activate the new MST region-related settings by using the active region-configuration command
Enable MSTP by using the stp enable command
Use the command...
system-view
stp region-configuration
region-name name
instance instance-id vlan
vlan-list
vlan-mapping modulo
modulo
revision-level level
active
region-configuration
check
region-configuration
display stp
region-configuration
1-17
Remarks
—
—
Required
The default MST region name of a
switch is its MAC address.
Required
Both commands can be used to
configure VLAN-to-instance
mapping tables.
By default, all VLANs in an MST
region are mapped to MSTI 0.
Required
The default revision level of an
MST region is level 0.
Required
Optional
Available in any view