Reliability Technologies - Huawei AR530 Series Configuration Manual

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Reliability
A smaller value of MTTR indicates higher reliability.

1.3 Reliability Technologies

Network reliability can be improved by increasing the MTBF or reducing the MTTR. Faults
caused by various factors are inevitable, so fault recovery technologies are important. The
following reliability technologies are mainly used to reduce the MTTR and meet level 3
reliability requirements.
Reliability technologies fall into fault detection technologies and protection switching
technologies.
Fault Detection Technologies
Fault detection technologies focus on fault detection and diagnosis.
detection technologies.
Table 1-2 Fault detection technologies
Technology
BFD
EFM
Protection Switching Technologies
Protection switching technologies focus on network recovery, and backs up hardware, link,
service information, and routing information and perform fast switching to ensure service
continuity.
Issue 01 (2014-11-30)
Description
Bidirectional Forwarding
Detection (BFD) is a unified
detection mechanism
independent of media and
protocols, and is used to
rapidly detect link faults and
monitor IP connectivity.
EFM monitors network faults
and is for use on last-mile
Ethernet access links to users
on the network. EFM needs
to be enabled on the two
directly connected devices so
that EFM can monitor the
link between the two devices.
Table 1-3 describes protection switching technologies.
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1 Introduction to Reliability
Table 1-2 describes the fault
Link
5 BFD Configuration
7 EFM Configuration
3