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CLI-based Configuration Guide - Reliability

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides guidance for configuring reliability services, including interface backup, BFD, VRRP, and EFM.
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Association Between Interface Backup in Active/Standby Mode and NQA

Association Between Interface Backup in Active/Standby Mode and NQA

When the upstream indirectly connected link of the primary interface is faulty, the interface backup module cannot detect the fault, causing service interruption. The NQA technology measures network performance and collects statistics on the response time, jitter, and packet loss ratio. Association between interface backup and NQA enables the system to detect connectivity of the primary link and implement rapid switching when the primary link is faulty. This improves reliability of service transmission.

Figure 2-5  Networking diagram of association between interface backup and NQA

As shown in Figure 2-5, the egress gateway RouterA in the headquarters of company connects to the Internet through GE1/0/0. The link between GE1/0/0 and the Internet is used as the primary link, and the link between ATM0/0/0 (ADSL interface) and the Internet is used as the backup link. An NQA test instance is configured on RouterA and association between interface backup and NQA is configured on ATM0/0/0. When the link between RouterD and RouterB is faulty, the NQA test instance can detect faults and instructs RouterA to start ATM0/0/0 to transmit services.

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Updated: 2019-03-06

Document ID: EDOC1100069338

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