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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 MAC Swap Loopback

Introduction to MAC Swap Loopback


MAC swap loopback is a technique which modifies the header of a received Ethernet frame by swapping the source and destination MAC addresses so that the frame can be returned to the sender. This function effectively checks Ethernet connectivity and network performance.


MAC swap loopback is used for checking Ethernet network connectivity and performance. It can be used with a network performance test tool to assess the connectivity, throughput, and QoS of an Ethernet network.

MAC swap loopback tests can only be performed on Ethernet frames with IP payloads.

Updated: 2019-08-21

Document ID: EDOC1000141941

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