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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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Configuring MC-LMSP

Configuring MC-LMSP

Inter-device LMSP switchbacks can be performed by configuring MC-LMSP.

Usage Scenario

Figure 13-3 shows an MC-LMSP network. Two network-side devices back up each other, improving link reliability. MC-LMSP needs to be configured on these two devices dual-homed to RNCs. MC-LMSP provides higher security than single-chassis LMSP provides. Single-chassis LMSP means interface, subcard, and board-based LMSP.

Figure 13-3 Association between an MC-LMSP group and PW redundancy

Pre-configuration Task

Before configuring MC-LMSP, complete the following tasks:

  • Configure an interface on the Router and ensure that the data link layer protocol run between the Router and the RNC is Up.
  • Run an IGP protocol on the backbone network so that devices can communicate with each other.

    In a PPP-based Layer 3 IP forwarding scenario, if devices use a dynamic routing protocol, the dynamic routes have to be re-learned during an LMSP link switchover. In the route convergence process, which lasts for dozens of seconds, service traffic may be dropped. To prevent this problem, configure static routes on the LMSP interfaces of the master, device, backup device, and the RNC. This configuration can prevent traffic loss.

Configuration Procedures

Figure 13-4 Flowchart for configuring MC-LMSP
Updated: 2019-01-02

Document ID: EDOC1100058399

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