the other devices. After receiving LSA request packets from the device, neighboring
interfaces reply with LSA ACK packets that contain the latest link state information.
l
SEP segment topology display
The topology display function allows you to view the topology with the highest network
connectivity on any device in a SEP segment. Link state synchronization ensures that all
devices in a SEP segment display the same topology.
shows the types of SEP segment topologies.
Table 8-4
Types of SEP segment topologies
Topology Type
Description
Constraint
Ring topology
Each interface in a SEP
segment has a neighboring
interface in Up state and a
brother interface, and each
node has two interfaces in
the SEP segment.
l
If the primary edge
interface is elected on a
ring, the primary edge
interface is listed first in
the topology
information displayed
on each interface.
l
If the primary edge
interface is not elected
but the secondary edge
interface is elected, the
secondary edge
interface is listed first in
the topology
information displayed
on each interface.
Linear topology
All topologies except ring
topologies are linear
topologies.
For interfaces at both ends
of a link:
l
If one interface
functions as the primary
edge interface, the
primary edge interface
is listed first in the
topology information
displayed on each
interface.
l
If the primary edge
interface is not elected
but the secondary edge
interface is elected, the
secondary edge
interface is listed first in
the topology
information displayed
on each interface.
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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