Step 3 Configure MSTP protection functions.
l Configure priorities of MSTP processes and enable root protection.
# Configure Switch A.
[SwitchA] stp process 1
[SwitchA-stp-process-1] stp instance 0 root primary
[SwitchA-stp-process-1] stp instance 1 root primary
[SwitchA-stp-process-1] quit
[SwitchA] stp process 2
[SwitchA-stp-process-2] stp instance 0 root primary
[SwitchA-stp-process-2] stp instance 2 root primary
[SwitchA-stp-process-2] quit
[SwitchA] interface gigabitethernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] stp root-protection
[SwitchA-GigabitEthernet1/0/2] quit
# Configure Switch B.
[SwitchB] stp process 3
[SwitchB-stp-process-3] stp instance 0 root primary
[SwitchB-stp-process-3] stp instance 3 root primary
[SwitchB-stp-process-3] quit
[SwitchB] stp process 2
[SwitchB-stp-process-2] stp instance 0 root secondary
[SwitchB-stp-process-2] stp instance 2 root secondary
[SwitchB-stp-process-2] quit
[SwitchB] interface gigabitethernet 1/0/2
[SwitchB-GigabitEthernet1/0/2] stp root-protection
[SwitchB-GigabitEthernet1/0/2] quit
NOTE
l In each ring, the priority of the MSTP process on the downstream CE must be lower than the priority
of the MSTP process on the switching device.
l For switches A and B on the dual-access ring, you are recommended to configure them as the
primary root bridges of different MSTIs.
l Configure share-link protection.
# Configure Switch A.
[SwitchA] stp process 2
[SwitchA-stp-process-2] stp link-share-protection
[SwitchA-stp-process-2] quit
# Configure Switch B.
[SwitchB] stp process 2
[SwitchB-stp-process-2] stp link-share-protection
[SwitchB-stp-process-2] quit
Step 4 Create VLANs and add interfaces to VLANs.
# Create VLANs 2to 200 on Switch A. Add GE 1/0/3 and GE 1/0/4 to VLANs 2 to 100, and add
GE 1/0/1 and GE 1/0/2 to VLANs 101 to 200.
[SwitchA] vlan batch 2 to 200
[SwitchA] interface gigabitethernet 1/0/3
[SwitchA-GigabitEthernet1/0/3] port link-type trunk
[SwitchA-GigabitEthernet1/0/3] port trunk allow-pass vlan 2 to 100
[SwitchA-GigabitEthernet1/0/3] quit
[SwitchA] interface gigabitethernet 1/0/4
[SwitchA-GigabitEthernet1/0/4] port link-type trunk
[SwitchA-GigabitEthernet1/0/4] port trunk allow-pass vlan 2 to 100
[SwitchA-GigabitEthernet1/0/4] quit
[SwitchA] interface gigabitethernet 1/0/1
[SwitchA-GigabitEthernet1/0/1] port link-type trunk
[SwitchA-GigabitEthernet1/0/1] port trunk allow-pass vlan 101 to 200
[SwitchA-GigabitEthernet1/0/1] quit
[SwitchA] interface gigabitethernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] port link-type trunk
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 9 MSTP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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