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Dell EMC SmartFabric OS10 User Guide Release 10.5.0

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DHCP relay agent

A DHCP relay agent relays DHCP messages to and from a remote DHCP server, even if the client and server are on different IP networks. You can configure the IP address of the remote DHCP server.

You can configure a device either as a DHCP server or a DHCP relay agent — but not both.

If routes are not leaked between VRFs, the DHCP relay agent supports multi-virtual routing and forwarding (VRF) instances. The client-facing and server-facing interfaces must be in the same VRF.

The DHCPv6 relay agent performs the same role as that of a DHCP relay agent, but in an IPv6 network. The DHCP relay agent forwards the DHCPv4/DHCPv6 messages from the configured interface to the DHCPv6 server as a unicast message. The DHCP relay agent then forwards the server’s response to the client.

When you configure DHCPv6 relay on an interface, you must:
  • Configure an IPv6 address on the interface.
  • Ensure that the DHCPv6 server is reachable.

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