Interface Description - Huawei Quidway S7700 Configuration Manual - Ethernet

Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet
Issue 01 (2011-07-15)
As shown in Table 10-2, edge interfaces are further classified into primary edge interfaces,
secondary edge interfaces, no-neighbor primary edge interfaces, and no-neighbor
secondary edge interfaces.
NOTE
Normally, an edge interface and a no-neighbor edge interface belong to different SEP segments.
Table 10-2 Interface roles
Interface Sub-role
roles
Common -
port
Edge port Primary
Edge Port
Secondary
edge port
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description
In a SEP segment, all interfaces except
edge interfaces and the blocked
interface are common interfaces.
A common interface monitors the
status of its directly connected SEP
link and notifies its neighboring
interface of link status changes in
time. The neighboring interface
constantly floods the notification
message to other interfaces in the SEP
segment until the message reaches the
primary edge interface. The primary
edge interface then processes the
message.
A SEP segment has only one primary
edge interface. It can either be
configured or be elected.
The primary edge interface initiates
blocked-interface preemption,
terminates packets, and sends packets
about topology changes to other
networks.
A SEP segment has only one
secondary edge interface. It can either
be configured or be elected.
A secondary edge interface terminates
packets, and sends topology change
notification messages to other
networks.
10 SEP Configuration
Deployment
Scenario
-
Open ring
network
Closed ring
network
Multiple-ring
networking
Hybrid SEP
+RRPP ring
networking
493