R3303-HP 6600/HSR6600 Routers Layer 2 - LAN Switching Command Reference

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• The MSTP revision level is 0.
After you enter MST region view, you can configure the MST region-related parameters, including the
region name, VLAN-to-instance mappings, and revision level.
Examples
# Enter MST region view.
<Sysname> system-view
[Sysname] stp region-configuration
[Sysname-mst-region]
stp root primary
Use stp root primary to configure the device as the root bridge.
Use undo stp root to restore the default.
Syntax
stp [ instance instance-id ] root primary
undo stp [ instance instance-id ] root
Default
A device is not a root bridge.
Views
System view
Default command level
2: System level
Parameters
instance instance-id: Configures the device as the root bridge in a particular MSTI. The value range for
this argument is 0 to 31. The value 0 represents the CIST.
Usage guidelines
To set an MSTP device as the root bridge in a specific MSTI, use this command with the MSTI specified.
To set an MSTP device in the CIST or an STP or RSTP device as the root bridge, use this command without
specifying any MSTI.
Once you specify the device as the root bridge, you cannot change the priority of the device.
Examples
# In MSTP mode, specify the device as the root bridge of MSTI 1.
<Sysname> system-view
[Sysname] stp instance 1 root primary
Related commands
• stp priority
• stp root secondary