Alcatel-Lucent 7705 - Filler Plates; Power System

Service Entities
Page 48 7705 SAR OS Services Guide
• An SDP tunnel from the local device (typically, a 7705 SAR) to the far-end device
(router) requires a return SDP tunnel from the far end back to the local device. Each
device must have an SDP defined for every remote router to which it wants to
provide service. The SDP must be created before a distributed service can be
configured.
• An SDP can be used to provide PW redundancy, where up to four spoke SDPs can
be assigned to a service endpoint that acts as the managing entity to ensure service
connection. See Pseudowire Redundancy on page 190.
SDP Binding
To configure a distributed service pointing from ALU-A to ALU-B, the SDP ID on the
ALU-A side (see Figure 4) must be specified during service creation in order to bind the
service to the tunnel (the SDP). Otherwise, service traffic is not directed to a far-end point
and the far-end 7705 SAR device(s) cannot participate in the service (there is no service). To
configure a distributed service pointing from ALU-B to ALU-A, the SDP ID on the ALU-B
side must be specified.
Figure 4: SDP Tunnel Pointing from ALU-A to ALU-B
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