[SwitchD] stp enable
Step 5 Verify the configuration.
After the preceding configurations are complete and the network topology becomes stable,
perform the following operations to verify the configuration.
# Run the display stp brief command on SwitchA to view the status and protection type on the
interfaces. The displayed information is as follows:
<SwitchA> display stp brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/2 DESI FORWARDING ROOT
0 GigabitEthernet1/0/1 DESI FORWARDING ROOT
1 GigabitEthernet1/0/2 DESI FORWARDING ROOT
1 GigabitEthernet1/0/1 DESI FORWARDING ROOT
The priority of SwitchA is the highest in the CIST; therefore, SwitchA is elected as the CIST
root and regional root of RG1. GE 1/0/2 and GE 1/0/1 of SwitchA are designated ports in the
CIST.
The priority of SwitchA in MSTI1 is the highest in RG1; therefore, SwitchA is elected as the
regional root of SwitchA. GE 1/0/2 and GE 1/0/1 of SwitchA are designated ports in MSTI1.
# Run the display stp interface brief commands on SwitchC. The displayed information is as
follows:
<SwitchC> display stp interface GigabitEthernet 2/0/1 brief
MSTID Port Role STP State Protection
0 GigabitEthernet2/0/1 ROOT FORWARDING NONE
1 GigabitEthernet2/0/1 ROOT FORWARDING NONE
<SwitchC> display stp interface GigabitEthernet 1/0/2 brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/2 DESI FORWARDING NONE
1 GigabitEthernet1/0/2 DESI FORWARDING NONE
GE 2/0/1 of SwitchC is the root port in the CIST and MSTI1. GE 1/0/2 of SwitchC is a designated
port in the CIST and MSTI1.
# Run the display stp brief command on SwitchB. The displayed information is as follows:
<SwitchB> display stp brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/2 ROOT FORWARDING NONE
0 GigabitEthernet1/0/1 DESI FORWARDING NONE
1 GigabitEthernet1/0/2 MAST FORWARDING NONE
1 GigabitEthernet1/0/1 ROOT FORWARDING NONE
The priority of SwitchB in the CIST is lower than that of SwitchA; therefore, GE 1/0/2 of
SwitchB functions as the root port in the CIST. SwitchA and SwitchB belong to different regions;
therefore, GE 1/0/2 of SwitchB functions as the master port in MSTI1. In MSTI1, the priority
of SwitchB is lower than that of SwitchD; therefore, GE 1/0/1 of SwitchB functions as the root
port. The priority of SwitchB in the CIST is higher than that of SwitchB; therefore, GE 1/0/1 of
SwitchB functions as the designated port in the CIST.
# Run the display stp interface brief commands on SwitchD. The displayed information is as
follows:
<SwitchD> display stp interface GigabitEthernet 2/0/1 brief
MSTID Port Role STP State Protection
0 GigabitEthernet2/0/1 ROOT FORWARDING NONE
1 GigabitEthernet2/0/1 DESI FORWARDING NONE
<SwitchD> display stp interface GigabitEthernet 1/0/2 brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/2 ALTE DISCARDING NONE
1 GigabitEthernet1/0/2 ALTE DISCARDING NONE
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.
463
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