92
[DeviceC-mst-region] active region-configuration
[DeviceC-mst-region] quit
# Specify the current device as the root bridge of MSTI 4.
[DeviceC] stp instance 4 root primary
# Enable the spanning tree feature globally.
[DeviceC] stp enable
5.
Configure Device D:
# Enter MST region view, configure the MST region name as
example
, map VLAN 10, VLAN 30,
and VLAN 40 to MSTI 1, MSTI 3, and MSTI 4, respectively, and configure the revision level of
the MST region as 0.
<DeviceD> system-view
[DeviceD] stp region-configuration
[DeviceD-mst-region] region-name example
[DeviceD-mst-region] instance 1 vlan 10
[DeviceD-mst-region] instance 3 vlan 30
[DeviceD-mst-region] instance 4 vlan 40
[DeviceD-mst-region] revision-level 0
# Activate MST region configuration.
[DeviceD-mst-region] active region-configuration
[DeviceD-mst-region] quit
# Enable the spanning tree feature globally.
[DeviceD] stp enable
6.
Verify the configurations:
In this example, suppose that Device B has the lowest root bridge ID. As a result, Device B is
elected as the root bridge in MSTI 0.
You can use the
display stp brief
command to display brief spanning tree information on each
device after the network is stable.
# Display brief spanning tree information on Device A.
[DeviceA] display stp brief
MSTID Port Role STP State Protection
0 Ethernet1/0/1 ALTE DISCARDING NONE
0 Ethernet1/0/2 DESI FORWARDING NONE
0 Ethernet1/0/3 ROOT FORWARDING NONE
1 Ethernet1/0/1 DESI FORWARDING NONE
1 Ethernet1/0/3 DESI FORWARDING NONE
3 Ethernet1/0/2 DESI FORWARDING NONE
3 Ethernet1/0/3 ROOT FORWARDING NONE
# Display brief spanning tree information on Device B.
[DeviceB] display stp brief
MSTID Port Role STP State Protection
0 Ethernet1/0/1 DESI FORWARDING NONE
0 Ethernet1/0/2 DESI FORWARDING NONE
0 Ethernet1/0/3 DESI FORWARDING NONE
1 Ethernet1/0/2 DESI FORWARDING NONE
1 Ethernet1/0/3 ROOT FORWARDING NONE
3 Ethernet1/0/1 DESI FORWARDING NONE
3 Ethernet1/0/3 DESI FORWARDING NONE
# Display brief spanning tree information on Device C.