Huawei NetEngine80E Configuration Manual - Reliability page 52

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HUAWEI NetEngine80E/40E Router

Configuration Guide - Reliability

Figure 3-1 Networking diagram of APS

APS uses K1 and K2 bytes in the MSOH to carry information. K1 transmits Changeover Order

(COO) signals for a traffic switchover; K2 transmits Changeover Acknowledgement (COA)

signals for a traffic switchback. For information about meanings of K1 and K2 bytes, see the

chapter "APS" in the HUAWEI NetEngine80E/40E Router Feature Description - Reliability.

APS Working Modes

Issue 02 (2014-09-30)

MPLS/SDH/Ethernet

When data is transmitted properly, APS is performed in either 1+1 or 1:N (1:1 is used as

an example) mode:

– 1+1: Two links work together. The sender sends traffic on both the working and protect

links and the receiver receives traffic from only the working link. The 1+1 mode allows

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3 APS Configuration

Netengine40e