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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Configuring MAC Address Flapping Prevention to Block User Attacks

Configuring MAC Address Flapping Prevention to Block User Attacks

In Figure 2-9, users need to access the server connected to Port1 of the switch. If an unauthorized user sends packets using the server's MAC address as the source MAC address, the server's MAC address is learned on another interface of the switch. Then packets sent to the server are sent to the unauthorized user. As a result, users cannot access the server, and important data may be intercepted by the unauthorized user. To prevent this, set a higher MAC address learning priority for the interface connected to the server than other interfaces.

Figure 2-9  Networking diagram of MAC address flapping prevention
Updated: 2019-08-21

Document ID: EDOC1000142081

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