Figure 3-1
Networking diagram of APS
RNC
Node B
MPLS/SDH/Ethernet
Node B
Node B
Node B
Node B
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
l
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
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
3 APS Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
35