These are the limitations for implementing DHCP relay feature: If you suspect user group assignment is preventing you from using a command, contactĪ configured and running DHCP client and DHCP server.Ĭonnectivity between the relay agent and DHCP server You must be in a user group associated with a task group that includes the proper task IDs. The following are the prerequisites to configure a DHCP relay agent: Prerequisites for Configuring DHCP Relay Agent Configuring Multiple Classes with a Pool.Configuring DHCP Relay Binding Database Write to System Persistent Memory.Configure a DHCP Relay Profile with Multiple Helper Addresses.How to Configure and Enable DHCP Relay Agent.Prerequisites for Configuring DHCP Relay Agent.Forwarding UDP Broadcasts to a DHCPv6 Server Using a Helper Address The relay agent unicasts the messages to the server address, in this case 2172:16:1::2 (which is specified by the helperįigure 1. Which enables the DHCPv6 server to determine which subnet should receive the offer and identify the appropriate IPv6 address The interface, on which the DHCPv6 client’s packets are received into the gateway address (giaddr) field of the DHCPv6 packet, The relay agent inserts the IPv6 address of To the DHCPv6 server's address and sends the message out on another interface.
Acting as a DHCPv6 relay agent, Router B picks up the broadcast, changes the destination address The DHCPv6 client broadcasts a request for an IPv6 address and additional configuration The figure below demonstrates the process. Server by configuring a DHCPv6 relay profile and configure one or more helper addresses in it. You can configure a DHCPv6 relay agent to forward DHCPv6 packets to a remote UDP broadcast packets are not forwarded, because most routersĪre not configured to forward broadcast traffic. That DHCPv6 packets reach the servers on another network segment. If a client is on a network segment that does not include a server, a relay agent is needed on that network segment to ensure
Relay agent forwarding is distinct from the normal forwarding of an IP router where IP packets are switched betweenĭHCPv6 clients use User Datagram Protocol (UDP) broadcasts to send DHCP DISCOVER messages when they lack information about A DHCPv6 relay agent is a host that forwards DHCPv6 packets between clients and servers that do not reside on a shared physical
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