DHCPv6-relay helper addresses

A unicast helper address enables routing of a client service request to the IPv6 address of a specific, remote DHCPv6 server.

The multicast forwarding options route DHCPv6 requests on a VLAN interface to either

  • The "All_DHCP_Servers" (FF05::1:3) multicast address

  • A user-selected multicast address

The routing switch supports up to 32 unique helper addresses and counts multiple instances of the same helper address on different VLANs as one address. Where multiple helper addresses are configured on the same VLAN, the routing switch forwards client service requests to all such addresses, and selects the server from which it receives the first response.