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Configuration Guide - Reliability

S1720, S2700, S5700, and S6720 V200R010C00

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.

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Configuration Task Summary

Configuration Task Summary

The switch supports the following Smart Link and Monitor Link features: basic functions of Smart Link, load balancing, link switching notification to the VPLS/VLL module, and basic functions of Monitor Link.

Table 6-2 describes the Smart Link and Monitor Link configuration tasks.

Table 6-2  Smart Link and Monitor Link configuration tasks




Configure basic functions of Smart Link

Basic functions of Smart Link can be configured to implement active/standby link redundancy and switching, improving network reliability.

Configuring Basic Functions of Smart Link

Configure load balancing in a Smart Link group

Load balancing improves link efficiency.

Configuring Load Balancing in a Smart Link Group

Configure Smart Link to notify the VPLS/VLL module of link switching events


Only the S5720HI, S6720EI, S6720S-EI, and S5720EI support this function.

When Smart Link is used in VPLS or VLL networking, the link switching notification function enables the VPLS/VLL module to quickly detect link switching events, which minimizes data loss.

Configuring Smart Link to Notify the VPLS/VLL Module of Link Switching Events

Configure Monitor Link

Monitor Link monitors an uplink interface on a device and triggers Up/Down state transitions on downlink interfaces in accordance with state changes on the uplink interface. State transitions on the downlink interfaces then trigger link switching of the topology protocol on the downstream device.

Configuring the Uplink and Downlink Interfaces in a Monitor Link Group

Updated: 2019-12-28

Document ID: EDOC1000141941

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