Stp Root Secondary - 3Com S7906E Command Reference Manual

View
System view
Default Level
2: System level
Parameters
instance instance-id: Configures the device as the root bridge in a particular MSTI. The value of
instance-id ranges from 0 to 31. The minimum value is 0, representing the CIST.
Description
Use the stp root primary command to configure the current device as the root bridge.
Use the undo stp root command to restore the system default.
By default, a device is not a root bridge.
Note that:
If you do not provide instance instance-id, your configuration will take effect in the CIST instance
only.
There is only one root bridge in effect in an MSTI. If two or more devices have been designated to
be root bridges of the same MSTI, MSTP will select the device with the lowest MAC address as the
root bridge.
You can specify a root bridge for each MSTI without caring about the device priority. After
specifying the current device as the root bridge or a secondary root bridge, you cannot change the
priority of the device.
Examples
# Specify the current device as the root bridge of MSTI 0.
<Sysname> system-view
[Sysname] stp instance 0 root primary

stp root secondary

Syntax
stp [ instance instance-id ] root secondary
undo stp [ instance instance-id ] root
View
System view
Default Level
2: System level
Parameters
instance instance-id: Configures the device as a secondary root bridge in a particular MSTI. The value
of instance-id ranges from 0 to 31. The minimum value is 0, representing the CIST.
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