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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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Introduction to Y.1731

Introduction to Y.1731

Y.1731 is used to implement end-to-end connectivity detection, loopback detection, and link trace on Metro Ethernets (MEs). It also provides test diagnosis and performance monitoring functions such as frame loss measurement, frame delay measurement, frame jitter measurement, and throughput measurement.

Ethernet in the First Mile (EFM) and Connectivity Fault Management (CFM) are used to detect link faults for carriers. Y.1731, an enhancement of CFM, can be configured to monitor service performance.

Hierarchical Ethernet operation, administration and maintenance (OAM) needs to be provided based on the network architecture, as shown in Figure 10-1.

Figure 10-1  Ethernet OAM networking

Y.1731 is an OAM protocol defined by the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T). It covers items defined in IEEE 802.1ag and provides additional OAM messages for fault management and performance monitoring. Fault management includes alarm indication signal (AIS), remote defect indication (RDI), locked signal (LCK), test signal, automatic protection switching (APS), maintenance communication channel (MCC), experimental (EXP) OAM, and vendor specific (VSP) OAM. Performance monitoring includes frame loss measurement (LM) and delay measurement (DM).

Updated: 2019-08-21

Document ID: EDOC1000141941

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