Operation Manual – MSTP
H3C S5500-EI Series Ethernet Switches
Chapter 1 MSTP Configuration
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Device A and Device B are convergence layer devices, while Device C and Device
D are access layer devices. VLAN 10 and VLAN 30 are terminated on the
convergence layer devices, and VLAN 40 is terminated on the access layer
devices, so the root bridges of MST instance 1 and MST instance 3 are Device A
and Device B respectively, while the root bridge of MST instance 4 is Device C.
II. Network diagram
Device A
Device B
Device D
Device C
Permit:all VLAN
Permit:VLAN 20,40
Permit:
VLAN 10,20
Permit:
VLAN 10,20
Permit:
VLAN 20,30
Permit:
VLAN 20,30
Figure 1-10
Network diagram for MSTP configuration
Note:
“Permit:“ beside each link in the figure is followed by the VLANs the packets of which
are permitted to pass this link.
III. Configuration procedure
1) Configuration on Device A
# Enter MST region view.
<DeviceA> system-view
[DeviceA] stp region-configuration
# Configure the region name, VLAN-to-instance mappings and revision level of the
MST region.
[DeviceA-mst-region] region-name example
[DeviceA-mst-region] instance 1 vlan 10
[DeviceA-mst-region] instance 3 vlan 30
[DeviceA-mst-region] instance 4 vlan 40
[DeviceA-mst-region] revision-level 0
# Activate MST region configuration manually.
[DeviceA-mst-region] active region-configuration
[DeviceA-mst-region] quit