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NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access 01

This is NE40E-M2 V800R010C10SPC500 Feature Description - LAN Access and MAN Access
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Overview of MAC Flapping-based Loop Detection

Overview of MAC Flapping-based Loop Detection

Definition

MAC flapping-based loop detection is a method for detecting Ethernet loops based on the frequency of MAC address entry flapping.

Purpose

Generally, redundant links are used on an Ethernet network to provide link backup and enhance network reliability. Redundant links, however, may produce loops and cause broadcast storms and MAC address entry flapping. As a result, the communication quality deteriorates, and communication services may even be interrupted. To eliminate loops on the network, the spanning tree protocols or Layer 2 loop detection technology was introduced. If you want to apply a spanning tree protocol, the protocol must be supported and you need to configure it on each user network device. If you want to apply the Layer 2 loop detection technology, user network devices must allow Layer 2 loop detection packets to pass. Therefore, the spanning tree protocols or the Layer 2 loop detection technology cannot be used to eliminate loops on user networks with unknown connections or user networks that do not support the spanning tree protocols or Layer 2 loop detection technology.

MAC flapping-based loop detection is introduced to address this problem. It does not require protocol packet negotiation between devices. A device independently checks whether a loop occurs on the network based on MAC address entry flapping.

Devices can block redundant links based on the frequency of MAC address entry flapping to eliminate loops on the network.

Benefits

This feature offers the following benefits to users:
  • Eliminates loops on a network of any topology.
  • Prevents broadcast storms and provides timely and reliable communication.
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Updated: 2019-01-02

Document ID: EDOC1100058405

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