Aps Overview - Huawei NetEngine80E Configuration Manual - Reliability

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HUAWEI NetEngine80E/40E Router

Configuration Guide - Reliability

3.1 APS Overview

The APS immediately switches services from a faulty link to a normal link by switching and

recovering linear multiplex sections.

3.1.1 APS Overview

The Automatic Protection Switching (APS) protocol uses the Multiplex Section Overhead

(MSOH) to transmit signals. APS works in either 1+1 or 1:N mode.

APS Principle

APS is an important feature of a Synchronous Digital Hierarchy (SDH) network. APS uses a

protect link to protect traffic on one or more working links. If a working link fails, services on

the working link automatically switches to the protect link, preventing user data loss and

improving network reliability.

large-scale data communications networks with high bandwidth. For example, data networks A

and B can communicate with each other by multiplexing services to SDH payloads and

transmitting the payloads over fibers. An APS-enabled router can protect traffic on a link to an

Add/Drop Multiplex (ADM) or a Radio Network Controller (RNC) of an SDH network that has

APS functions. Two APS-enabled routers can also protect traffic on direct links between them.

Issue 02 (2011-09-10)

shows an SDH network is a supporting network and allows the establishment of

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3 APS Configuration

Netengine40e