DHCP Messages

When DHCP Snooping filters messages, it differentiates between DHCP Server messages and DHCP Client messages.

Messages sent by DHCP Servers:

  • OFFER

  • ACK

  • NAK = Opposite to ACK, used to decline a client's REQUEST

Messages sent by DHCP Clients:

  • DISCOVER

  • REQUEST

  • RELEASE = Used to tell the server that the client no longer needs its IP address

  • DECLINE = Used to decline the IP address offered by a DHCP server

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