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MST region-related parameters include: region name, revision level, and VLAN-to-MSTI mapping table.
By default:
z MST region name is the first MAC address of the switch
z All VLANs are mapped to the CIST in the VLAN-to-MSTI mapping table
z The MSTP revision level is 0
You can modify the three parameters after entering MST region view by using the stp
region-configuration command.
NTDP packets sent by devices in a cluster can be transmitted in only the instances where the
management VLAN of the cluster resides.
Examples
# Enter MST region view.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] stp region-configuration
[Sysname-mst-region]
stp root primary
Syntax
stp [ instance instance-id ] root primary [ bridge-diameter bridgenum [ hello-time centi-seconds ] ]
undo stp [ instance instance-id ] root
View
System view
Parameters
instance-id: MSTI ID ranging from 0 to 16. The value of 0 refers to the CIST.
bridgenum: Network diameter of the specified spanning tree. This argument ranges from 2 to 7 and
defaults to 7.
centi-seconds: Hello time in centiseconds of the specified spanning tree. This argument ranges from
100 to 1,000 and defaults to 200.
Description
Use the stp root primary command to configure the current switch as the root bridge of a specified
MSTI.
Use the undo stp root command to cancel the current configuration.
By default, a switch is not configured as a root bridge.
If you do not specify the instance-id argument, these two commands apply to only the CIST.
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