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NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access
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Introduction to LMSP

Introduction to LMSP

Linear multiplex section protection (LMSP) is an SDH interface-based protection technique that uses an SDH interface to protect services on another SDH interface. If a link failure occurs, LMSP enables a device to send a protection switching request over K bytes to its peer device. The peer device then returns a switching bridge reply.

LMSP is often referred to as low speed APS protection.

Large numbers of low-speed links still exist on the user side. These links may be unstable due to aging. These links have a small capacity and may fail to work properly due to congestion in traffic burst scenarios. Therefore, a protection technique is required to provide reliability and stability for these low-speed links.

LMSP is an inherent feature of an SDH network. When a mobile bearer network is deployed, a Router must be connected to an add/drop multiplexer (ADM) or RNC, both of which support LMSP. As the original protection function of the Router cannot properly protect the communication channel between the Router and ADM or RNC, LMSP is introduced to resolve this issue.

Updated: 2019-01-02

Document ID: EDOC1100058399

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