Optical Segment Recovery; Figure 44: Full Lsp Rerouting - Alcatel-Lucent 7450 Manual

Ethernet service switch

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Working (primary)

Optical Segment Recovery

Optical segment protection refers to the ability of the optical network to protect the span of a gLSP

between ingress and egress UNI-N nodes. It does not require any protection switching on the UNI-

C nodes. However, it does require the UNI-C to signal a request for a particular segment

protection type towards the UNI-N in the PATH message for a gLSP. The optical network may

either accept this request, reject it or respond with an alternative. Segment protection is defined in

7450 ESS MPLS Guide

Notify, NotifyErr

Path, PathErr

OTN/photonic