Configuring The Root Bridge Or A Secondary Root Bridge - HPE FlexNetwork 5130 HI Series Configuration Manual

•
Use the active region-configuration command.
•
Enable a spanning tree protocol by using the stp global enable command if the spanning tree
protocol is disabled.
In STP, RSTP, or PVST mode, MST region configurations do not take effect.
To configure an MST region:
Step
Enter system view.
1.
Enter MST region view.
2.
Configure the MST region
3.
name.
Configure
4.
VLAN-to-instance
table.
Configure the MSTP revision
5.
level of the MST region.
(Optional.) Display the MST
6.
region configurations that are
not activated yet.
Manually
7.
region configuration.
Configuring the root bridge or a secondary root
bridge
You can have the spanning tree protocol determine the root bridge of a spanning tree through
calculation. You can also specify the current device as the root bridge or as a secondary root bridge.
A device has independent roles in different spanning trees. It can act as the root bridge in one
spanning tree and as a secondary root bridge in another. However, one device cannot be the root
bridge and a secondary root bridge in the same spanning tree.
A spanning tree can have only one root bridge. If multiple devices can be selected as the root bridge
in a spanning tree, the device with the lowest MAC address is chosen.
When the root bridge of an instance fails or is shut down and no new root bridge is specified, the
following events occur:
•
If you specify only one secondary root bridge for the instance, it becomes the root bridge.
•
If you specify multiple secondary root bridges for the instance, the secondary root bridge with
the lowest MAC address is given priority.
•
If you do not specify a secondary root bridge, a new root bridge is calculated.
You can specify one root bridge for each spanning tree, regardless of the device priority settings.
Once you specify a device as the root bridge or a secondary root bridge, you cannot change its
priority.
You can configure the current device as the root bridge by setting the device priority to 0. For the
device priority configuration, see
Command
system-view
stp region-configuration
region-name name
•
the
mapping
•
revision-level level
check region-configuration
activate MST
active region-configuration
"Configuring the device
instance instance-id vlan
vlan-id-list
vlan-mapping modulo
modulo
priority."
81
Remarks
N/A
N/A
The default setting is the MAC
address.
Use one of the commands.
By default, all VLANs in an MST
region are mapped to the CIST (or
MSTI 0).
The default setting is 0.
N/A
N/A