5.1 Introduction to ITU-T Recommendation Y.1731
Y.1731, as an Operations, Administration and Maintenance (OAM) protocol organized by the
ITU-T, is used to implement end-to-end Metropolitan Area Network (MAN) connectivity
detection, loopback detection, and link trace. It also provides the performance monitoring
functions, including frame loss measurement, frame delay measurement, frame jitter
measurement, and throughput measurement.
NOTE
The S3700SI does not support Y.1731.
Y.1731 is an OAM protocol organized by the ITU-T. It covers not only the contents defined by
IEEE 802.1ag but also combinations of OAM messages, including the Remote Defect Indication
(RDI), Locked Signal (LCK), Test Signal, Automatic Protection Switching (APS), Maintenance
Communication Channel (MCC), Experimental OAM (EXP), and Vendor Specific (VSP) for
fault management and performance monitoring, such as frame loss measurement (LM) and delay
measurement ( DM).
, ITU-T Recommendation Y.1731 is commonly deployed on MEPs to
implement end-to-end fast fault detection and performance monitoring.
Figure 5-1
Application of ITU-T Recommendation Y.1731
MA
MEP1
MEP2
802.1ag/Y.1731
When a user considers that the purchased Ethernet tunnel services are of low quality or when
an operator needs to conduct their regular service level agreement (SLA) monitoring, ITU-T
Recommendation Y.1731, as defining performance testing tools, is applicable. For example,
ITU-T Recommendation Y.1731 supports the sending and receiving of Continuity Check
Messages (CCMs) to calculate frame loss ratio and bidirectional frame delay and jitter.
5.2 ITU-T Recommendation Y.1731 Features Supported by
the S3700
The Y.1731 features supported by the S3700 include one-way frame delay measurement and
two-way frame delay Measurement.
Quidway S3700 Series Ethernet Switches
Configuration Guide - Reliability
5 ITU-T Recommendation Y.1731 Configuration
Issue 01 (2011-10-26)
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