Huawei AR530 series Configuration Manual page 298

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
Primary Edge Interface Election
Only interfaces that are configured as no-neighbor edge interfaces, primary edge interfaces, and
secondary edge interfaces can participate in primary edge interface election.
As shown in
interfaces, the following situations occur:
l
l
After the primary edge interface is selected, it periodically sends primary edge interface election
packets without waiting for the success of neighbor negotiations. A primary edge interface
election packet contains the interface role (primary edge interface, secondary edge interface, or
common interface), bridge MAC address of the interface, interface ID, and integrity of the
topology database.
Figure 8-3 Networking diagram of electing the primary edge interface
Router1
Router2
Issue 01 (2014-11-30)
NOTE
The constraints listed in
same topology information.
NOTE
If only one interface on a node has SEP enabled, you must set the role of the interface to edge so that the
interface can function as an edge interface.
Figure 8-3, if there is no faulty link on the network and SEP is enabled on the
Common interfaces do not participate in primary edge interface election. Only P1 on
Router1 and P1 on Router5 participate in primary edge interface election.
If P1 on Router1 and P1 on Router5 have the same role, P1 with a higher MAC address is
elected as the primary edge interface.
Network
P1
SEP
Segment
Router3
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Table 8-4 ensure that each node in a ring or linear topology displays the
Router1
Router5
P1
Router2
Router4
Failed
8 SEP Configuration
Network
P1
SEP
Segment
Router3
Primary Edge Port
Secondary Edge Port
Election packet of
Primary Edge Port
Router5
P1
Router4
Failed
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