[LSW2-GigabitEthernet1/0/1] sep segment 1 edge no-neighbor secondary
[LSW2-GigabitEthernet1/0/1] quit
[LSW2] interface gigabitethernet 1/0/2
[LSW2-GigabitEthernet1/0/2] stp disable
[LSW2-GigabitEthernet1/0/2] sep segment 1
[LSW2-GigabitEthernet1/0/2] quit
# Configure LSW3.
[LSW3] interface gigabitethernet 1/0/1
[LSW3-GigabitEthernet1/0/1] stp disable
[LSW3-GigabitEthernet1/0/1] sep segment 1
[LSW3-GigabitEthernet1/0/1] quit
[LSW3] interface gigabitethernet 1/0/2
[LSW3-GigabitEthernet1/0/2] stp disable
[LSW3-GigabitEthernet1/0/2] sep segment 1
[LSW3-GigabitEthernet1/0/2] quit
# Configure PE2.
[PE2] interface gigabitethernet 1/0/1
[PE2-GigabitEthernet1/0/1] stp disable
[PE2-GigabitEthernet1/0/1] sep segment 1 edge secondary
[PE2-GigabitEthernet1/0/1] quit
After completing the preceding configurations, run the display sep topology command on
PE1 to view the topology of the SEP segment. You can see that the blocked interface is
one of the last two interfaces that complete neighbor negotiation.
[PE1] display sep topology
SEP segment 1
-----------------------------------------------------------------
System Name Port Name Port Role Port Status
-----------------------------------------------------------------
PE1 GE1/0/1 primary forwarding
LSW1 GE1/0/1 common forwarding
LSW1 GE1/0/2 common forwarding
LSW3 GE1/0/2 common forwarding
LSW3 GE1/0/1 common forwarding
LSW2 GE1/0/2 common forwarding
LSW2 GE1/0/1 common forwarding
PE2 GE1/0/1 secondary discarding
3. Set an interface blocking mode.
# In Segment1, block the interface in the middle of the SEP segment on PE1 where the
primary edge interface resides.
[PE1] sep segment 1
[PE1-sep-segment1] block port middle
4. Set the preemption mode.
# In Segment1, set the preemption mode on PE1 where the primary edge interface resides
to manual preemption.
[PE1-sep-segment1] preempt maunal
5. Advertise SEP topology changes.
# In Segment1, advertise the topology change to RRPP.
# Configure PE1.
[PE1-sep-segment1] tc-notify rrpp
[PE1-sep-segment1] quit
# Configure PE2.
[PE2] sep segment 1
[PE2-sep-segment1] tc-notify rrpp
[PE2-sep-segment1] quit
After the preceding configurations are successful, perform the following operations to verify the
configurations. Take PE1 as an example.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 10 SEP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
553
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