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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Application Environment

Application Environment

This section describes the applicable environment of MAC address flapping.

MAC Address Anti-flapping

As shown in Figure 5-11, employees of an enterprise need to access the enterprise server. If an attacker uses the server MAC address as the source MAC address to send packets to another interface, the server MAC address is learned on the interface. Packets sent to the server are sent to unauthorized users. In this case, employees cannot access the server, and important data will be intercepted by the attacker. MAC address anti-flapping can be configured to prevent unauthorized users from using the server MAC address to access the switch.

Figure 5-11 Networking diagram of MAC address anti-flapping

MAC Address Flapping Detection

As shown in Figure 5-12, a loop occurs on a user network because network cables between two LSWs are incorrectly connected. The loop causes MAC address flapping and MAC address table flapping.

You can enable MAC address flapping detection on the Switch to detect MAC address flapping and discover loops.

Figure 5-12 Networking diagram of MAC address flapping detection

Updated: 2019-08-09

Document ID: EDOC1000041694

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