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Configuration Guide - Ethernet Switching

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, MUX VLAN, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Overview of M-LAG

Overview of M-LAG

Definition

Multichassis Link Aggregation Group (M-LAG) implements link aggregation among multiple devices. In a dual-active system shown in Figure 4-1, one device is connected to two devices through M-LAG to achieve device-level link reliability.
Figure 4-1 M-LAG network

Purpose

As an inter-device link aggregation technology, M-LAG increases link bandwidth, improves link reliability, and implements load balancing. It has the following advantages:

  • High reliability

    M-LAG protects link reliability for entire devices.

  • Simplified network and configuration

    M-LAG is a horizontal virtualization technology that virtualizes two dual-homed devices into one device. M-LAG prevents loops on a Layer 2 network and implements redundancy, without performing laborious spanning tree protocol configuration. M-LAG greatly simplifies the network and configuration.

  • Independent upgrade

    Two devices can be upgraded independently. This prevents service interruption when either device is upgrading.

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Updated: 2019-05-08

Document ID: EDOC1100004351

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