Configure a DHCP Relay Forwarding Path

Configure a forwarding path to specify the relay agent address and the DHCP server address to which to forward packets.

To use DHCP Relay for IPv6, you must configure at least one forwarding path and enable the relay on one interface.

Before you begin

Change the VRF instance as required to configure a DHCP Relay forwarding path on a specific VRF instance. Not all parameters are configurable on non-default VRFs.

About this task

The relay agent can use the IPv6 address of the interface or the VRRP global address linked to that interface. The relay forwards the DHCP messages only if VRRP is in the Master state, otherwise the relay discards the messages.

You can configure only one relay agent on an interface. If you need to change the relay agent, you must delete all the forwarding paths with the old relay agent, and then configure the new relay agent.

For scaling information on DHCP Relay forwarding paths, see Fabric Engine Release Notes.

Procedure

  1. In the navigation pane, expand Configuration > IPv6.
  2. Select DHCP Relay.
  3. Select the Forward Path tab.
  4. Select Insert.
  5. In AgentAddr, type the address of the input interface that forwards the packets.
  6. In ServerAddr, type the address of the DHCP server.
  7. Select Enabled.
  8. Select Insert.

Forward Path Field Descriptions

Use the data in the following table to use the Forward Path tab.

Name

Description

AgentAddr

Specifies the IP address of the input interface (relay agent) on which the DHCP request packets are received for forwarding. This address is the IPv6 or VRRP global address of either a brouter port or a VLAN for which forwarding is enabled.

ServerAddr

Specifies the IP address of the DHCP server. The request is unicast to the server address.

Enabled

Enables DHCP Relay for the system. The default is disabled (clear).