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CLI-based Configuration Guide - Reliability

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides guidance for configuring reliability services, including interface backup, BFD, VRRP, and EFM.
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Reliability Specifications

Reliability Specifications

The Mean Time Between Failures (MTBF) and Mean Time to Repair (MTTR) are used to evaluate system reliability.


The MTBF refers to the average time (usually expressed in hours) when a component or a device works without any failure. A larger value of the MTBF indicates higher reliability.


The MTTR refers to the average time that a component or a device will take to recover from any failure. MTTR also involves device management and customer service, and is an important specification for device maintenance.

MTTR = Fault detection time + Hardware replacement time + System initialization time + Link recovery time + Route convergence time + Forwarding recovery time

A smaller value of MTTR indicates higher reliability.

Updated: 2019-08-12

Document ID: EDOC1100034076

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