H3C S7500X Series Configuration Manual page 280

NOTE:
• As a best practice, do not connect ports on Device A and Device B that have the same port ID
with each other, for example Layer 2 aggregate ports. Otherwise, when Device A and Device B
communicate through the link, the spanning tree protocol determines that the device receives its
own BPDUs. Loop guard will block the link, though spanning tree features are not affected.
• You can view port IDs of interfaces on the device by using the display stp interface command.
• The preceding restrictions do not apply to IPPs and their member ports.
Figure 27 Network diagram
Configuration procedure
Configure VLANs and VLAN member ports. (Details not shown.)
1.
Create VLAN 10, VLAN 20, and VLAN 30 on both Device A and Device B.
Create VLAN 10, and VLAN 20 on Device C.
Create VLAN 20, and VLAN 30 on Device D.
Configure the ports on these devices as trunk ports and assign them to related VLANs.
Configure DRNI on Device A and Device B. (Details not shown.)
2.
For more information about DRNI, see "Configuring DRNI."
Configure Device A:
3.
# Set the spanning tree mode to PVST.
<DeviceA> system-view
[DeviceA] stp mode pvst
# Configure the device as the root bridge of VLAN 10 and VLAN 20.
[DeviceA] stp vlan 10 20 root primary
# Enable the spanning tree feature globally and in VLAN 10, VLAN 20, and VLAN 30.
[DeviceA] stp global enable
[DeviceA] stp vlan 10 20 30 enable
Configure Device B in the same way Device A is configured. (Details not shown.)
4.
Configure Device C:
5.
# Set the spanning tree mode to PVST.
<DeviceC> system-view
[DeviceC] stp mode pvst
# Enable the spanning tree feature globally and in VLAN 10, and VLAN 20.
[DeviceC] stp global enable
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