Figure 13: Mc-Aps Group Protects Against Node Failure - Alcatel-Lucent 7750 Configuration Manual

Service router

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the protection circuit/router is not enforced by the 7750 SR. Service or network-specific

configuration data is not signalled nor synchronized between the two service routers.

Signalling is provided using the direct connection between the two service routers. A heartbeat

protocol can be used to add robustness to the interaction between the two routers. Signalling

functionality includes support for:

Note that external requests like lockout, force, and manual switches are allowed only on the APS

group having the protection circuit.

MDA, IOM or node failure.

7750 SR Interface Configuration Guide

APS group matches between service routers.

Verification that one side is configured as a working circuit and the other side is

configured as the protect circuit. In case of a mismatch, a trap (incompatible neighbor) is

Change in working circuit status is sent from the working router to keep the protect router

Protect router, based on K1/K2 byte data, member circuit status, and external request,

selects the active circuit, and informs the working router to activate or de-activate the

working circuit.

illustrates a Multi-Chassis APS group being used to protect against link, port,

Figure 13: MC-APS Group Protects Against Node Failure

Interface Configuration

mc-aps Signaling Link

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