Table 24: Supported Aps Mode Combinations - Alcatel-Lucent 7750 Configuration Manual

Service router

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Port Features

APS Applicability, Restrictions and Interactions

Note: The Release Notes for the relevant SR-OS release should be consulted for details about APS

restrictions.

Table 24: Supported APS Mode Combinations

Single Chassis APS

Multi-Chassis APS

APS and Bundles

Bundles (such as IMA and MLPPP) can be protected with APS through the use of Bundle

Protection Groups (BPGRP). For APS-protected bundles, all members of a working bundle must

reside on the working port of an APS group. Similarly all members of a protecting bundle must

reside on the protecting circuit of that APS group.

IMA APS protection is supported only when the router is connected to another piece of equipment

(possibly through an ADM) running a single IMA instance at the far end. By design, the IMA APS

implementation is expected to keep the IMA protocol up as long as the far end device can tolerate

some frame loss. Similarly, the PPP protocol state machine for PPP channels and MLPPP bundles

remains UP when a switchover occurs between the working and protect circuits.

When APS protects IMA groups, IMA control cells, but not user traffic, are sent on the inactive

circuit (as well as the active) to keep the IMA protocol up during an APS switch.

For details on MLFR/FRF.12 support with APS see the MLFR/FRF.12 Support of APS, BFD, and

Mirroring Features section.

Bidirectional 1+1

Signalling APS

Unidirectional 1+1

Signalling APS

Not supported

7750 SR Interface Configuration Guide

Unidirectional 1+1

Signalling and Datapath

Supported (for 7750 SR-c4/

12 platforms only)

Not supported

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