[SwitchA] stp enable
# Enable RSTP globally on SwitchB.
[SwitchB] stp enable
# Enable RSTP globally on SwitchC.
[SwitchC] stp enable
# Enable RSTP globally on SwitchD.
[SwitchD] stp enable
Step 2 Configure RSTP protection functions, for example, root protection on a designated port of a root
bridge in each MSTI.
# Enable root protection on GE 1/0/1 on SwitchA.
[SwitchA] interface gigabitethernet 1/0/1
[SwitchA-GigabitEthernet1/0/1] stp root-protection
[SwitchA-GigabitEthernet1/0/1] quit
# Enable root protection on GE 1/0/2 on SwitchA.
[SwitchA] interface gigabitethernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] stp root-protection
[SwitchA-GigabitEthernet1/0/2] quit
Step 3 Verify the configuration.
After the previous configurations, run the following commands to verify the configuration when
the network is stable:
# Run the display stp brief command on SwitchA to view the interface status and protection
type. The displayed information is as follows:
[SwitchA] display stp brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/1 DESI FORWARDING ROOT
0 GigabitEthernet1/0/2 DESI FORWARDING ROOT
After SwitchA is configured as a root bridge, GE 1/0/2 and GE 1/0/1 connected to SwitchB and
SwitchD respectively are elected as designated ports in spanning tree calculation. The root
protection function is enabled on the designated ports.
# Run the display stp interface gigabitethernet 1/0/1 brief command on SwitchB to view status
of GE 1/0/1. The displayed information is as follows:
[SwitchB] display stp interface gigabitethernet 1/0/1 brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/1 DESI FORWARDING NONE
GE 1/0/1 is elected as a designated port in spanning tree calculation and is in the Forwarding
state.
# Run the display stp brief command on SwitchC to view the interface status and protection
type. The displayed information is as follows:
[SwitchC] display stp brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/1 ALTE DISCARDING NONE
0 GigabitEthernet1/0/3 ROOT FORWARDING NONE
GE 1/0/1 is elected as an alternate port in spanning tree calculation and is in the Discarding state.
GE 1/0/3 is elected as a root port in spanning tree calculation and is in the Forwarding state.
----End
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 8 STP/RSTP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
415
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