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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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Levels of Reliability Requirements

Levels of Reliability Requirements

There are three requirement levels according to the objective of the implementation and the implementation itself. Table 2-1 lists three levels of reliability requirements.

Table 2-1  Levels of reliability requirements





Fewer faults in the system software and hardware

  • Hardware: simplified circuit design, improved production technique, and reliability test
  • Software: software reliability design and test


No impact on the system when a fault occurs

Device and link redundancy design, switchover policy, and switchover success rate


Rapid recovery from a fault that affects the system

Fault detection, diagnosis, isolation, and recovery

All three levels of reliability must be considered during different stages of building a network:

  • Level 1 when designing and producing network devices
  • Level 2 when designing network architectures
  • Level 3 when using reliability technologies during network deployment
Updated: 2019-12-28

Document ID: EDOC1000141941

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