R3303-HP 6600/HSR6600 Routers Layer 2 - LAN Switching Configuration Guide

60
Ste
p
Command Remarks
2. Configure the current
device as the root
bridge.
• In STP/RSTP mode:
stp root primary
• In MSTP mode:
stp [ instance instance-id ] root primary
Use one of the commands.
By default, a device does not
function as the root bridge.
Configuring the current device as a secondary root bridge of a
specific spanning tree
To configure the current device as a secondary root bridge of a specific spanning tree:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the current
device as a secondary root
bridge.
• In STP/RSTP mode:
stp root secondary
• In MSTP mode:
stp [ instance instance-id ] root
secondary
Use one of the commands.
By default, a device does not
function as a secondary root
bridge.
Configuring the device priority
Priority is a factor in spanning tree calculations. The priority of a device determines whether the device
can be elected as the root bridge of a spanning tree. A lower numeric value indicates a higher priority.
You can set the priority of a device to a low value to specify the device as the root bridge of the spanning
tree. A spanning tree device can have different priorities in different MSTIs.
You cannot change the priority of a device after it is configured as the root bridge or as a secondary root
bridge.
During root bridge selection, if all devices in a spanning tree have the same priority, the one with the
lowest MAC address will be selected as the root bridge of the spanning tree.
To configure the priority of a device in a specified MSTI:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the priority of
the current device.
• In STP/RSTP mode:
stp priority priority
• In MSTP mode:
stp [ instance instance-id ] priority priority
Use one of the
commands.
The default setting is
32768.
Configuring the maximum hops of an MST region
By setting the maximum hops of an MST region, you can restrict the region size. The maximum hops
configured on the regional root bridge will be used as the maximum hops of the MST region.