Realization method and system of remote loopback

Abstract

The invention discloses realization method and system of remote loopback, wherein the realization method of the remote loopback comprises the following steps that: an exchanger receives the test message of controlled end DTE (Data Terminal Equipment) loopback; and the exchanger directly transfers the test message of the loopback to main control end DTE. The invention realizes the far-end loopback test of the Ethernet OAM (Operation and Maintenance) when the exchanger exists between the DTE at both ends of links of 802.3ah protocol, and ensures the successful realization of far-end loopback test when the exchanger exists between the main control end DTE and the controlled end DTE.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for realizing remote loopback. Background technique [0002] Under the background of the concept of carrier-class Ethernet, IEEE's Ethernet in the First Mile Task Force (Ethernet in the First Mile Task Force) completed the formulation of the IEEE 802.3ah standard. Its main goal is to formulate a series of Ethernet physical layer (PHYSICAL LAYER) and data link layer (DATA LINK LAYER) standards to promote the advantages of Ethernet, a communication medium, in all aspects of access network deployment. The Ethernet OAM (Operations, Administration and Maintenance) part of the IEEE 802.3ah standard provides an effective mechanism for link monitoring and fault location, filling the gap of OAM in the Ethernet data link layer . [0003] The remote loopback function is an important part of Ethernet OAM. It provides an effective mechanism for locating link faults and...

AI Technical Summary

Problems solved by technology

[0007] However, when there is a switching device between the two DTEs (that is, the DTE at the master control end and the DTE at the controlled end), the following problems will be caused: since the DTE at the controlled end does not change the source of the test message from the DTE at the master control end , the destination MAC address is looped back as it is, so the switching device between the two DTEs will find that the destination MAC address of the loopback test message received from the controlled end DTE is still the MAC address of the controlled end DTE, that is, the destination MAC address from the controlled end DTE. The destination of the loopback test message of the controlled terminal DTE is still the controlled terminal DTE, and like this, the switching device will mistakenly discard the loopback test message returned by the controlled terminal DTE to the main control terminal DTE, instead of Forwarded to the control terminal DTE, resulting in the failure of the remote loopback test

Images