NOTE
l The control VLAN must be a VLAN that has not been created or used, but the configuration file
automatically displays the command for creating the VLAN.
l Each SEP segment must be configured with a control VLAN. After an interface is added to the
SEP segment configured with a control VLAN, the interface is automatically added to the control
VLAN.
2. Add Router1 to Router3 to SEP segment 1 and configure interface roles.
# Configure Router1.
[Router1] interface gigabitethernet 7/0/1
[Router1-GigabitEthernet7/0/1] sep segment 1 edge no-neighbor primary
[Router1-GigabitEthernet7/0/1] quit
[Router1] interface gigabitethernet 7/0/2
[Router1-GigabitEthernet7/0/2] stp disable
[Router1-GigabitEthernet7/0/2] sep segment 1
[Router1-GigabitEthernet7/0/2] quit
# Configure Router2.
[Router2] interface gigabitethernet 7/0/1
[Router2-GigabitEthernet7/0/1] sep segment 1 edge no-neighbor secondary
[Router2-GigabitEthernet7/0/1] quit
[Router2] interface gigabitethernet 7/0/2
[Router2-GigabitEthernet7/0/2] stp disable
[Router2-GigabitEthernet7/0/2] sep segment 1
[Router2-GigabitEthernet7/0/2] quit
# Configure Router3.
[Router3] interface gigabitethernet 7/0/1
[Router3-GigabitEthernet7/0/1] stp disable
[Router3-GigabitEthernet7/0/1] sep segment 1
[Router3-GigabitEthernet7/0/1] quit
[Router3] interface gigabitethernet 7/0/2
[Router3-GigabitEthernet7/0/2] stp disable
[Router3-GigabitEthernet7/0/2] sep segment 1
[Router3-GigabitEthernet7/0/2] quit
3. Specify an interface to block.
# On Router1 where the no-neighbor primary edge interface of SEP segment 1 is located,
specify the interface in the middle of the SEP segment as the interface to block.
[Router1] sep segment 1
[Router1-sep-segment1] block port middle
4. Configure the preemption mode.
# Configure the manual preemption mode on Router1.
[Router1-sep-segment1] preempt manual
5. Configure the topology change notification function.
# Configure devices in SEP segment 1 to notify the MSTP network of topology changes.
# Configure Router1.
[Router1-sep-segment1] tc-notify stp
[Router1-sep-segment1] quit
# Configure Router2.
[Router2] sep segment 1
[Router2-sep-segment1] tc-notify stp
[Router2-sep-segment1] quit
Step 2 Configure basic MSTP functions.
1. Configure an MST region.
# Configure PE1.
Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
8 SEP Configuration
Issue 01 (2014-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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