a node on the link becomes faulty (it is assumed that the link between LSW1 and LSW5 becomes
faulty), the following situations occur:
l If SEP is not deployed on the closed-ring, CE1 still forwards traffic along the original path,
causing traffic interruption.
l If SEP is deployed on the closed-ring, the blocked interface on LSW5 becomes unblocked
and enters the forwarding state. In addition, it sends Link Status Advertisements (LSAs)
to instruct other nodes on the SEP segment to refresh their LSA databases. CE1 sends traffic
along the backup link LSW5->LSW2->LSW4->LSW3->NPE1. This ensures proper traffic
transmission.
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.
490
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