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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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This section describes the definition, background, and functions of DHCP snooping.


The Dynamic Host Configuration Protocol (DHCP) snooping feature ensures that DHCP clients obtain IP addresses from authorized DHCP servers and records mappings between IP addresses and MAC addresses of DHCP clients, preventing DHCP attacks on the network.


Some attacks are launched on DHCP (RFC 2131). These attacks include the bogus DHCP server attack, DHCP server DoS attack, and bogus DHCP message attack.

DHCP snooping is equivalent to a firewall between DHCP clients and the DHCP server to prevent DHCP attacks on the network, ensuring security for communication services.


  • The device can defend against DHCP attacks on the network. The DHCP attack defense capability enhances device reliability and ensures stable network operating.
  • Users are provided with more stable services on a more secure network.
Updated: 2019-08-09

Document ID: EDOC1000041694

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