Running DHCPv6 relay without interfaces

Peter Rathlev peter at
Thu Mar 14 13:40:00 UTC 2013

On Thu, 2013-03-14 at 08:56 -0400, Neff, Glen wrote:
> This makes no sense.  If you don't have multiple interfaces, then you
> shouldn't need a relay.

I disagree that relay with only one interface doesn't make sense. If the
DHCP server is not connected to the local LAN you need something to
forward the requests. The relay agent just receives a broadcast (or
multicast for IPv6) packet and converts it to a unicast packet.

For DHCPv6 you could also route the FF02::1:2 address to the DHCP server
but that would require L3 multicast routing.

The relay function often sits with a router but it doesn't have to.


More information about the dhcp-users mailing list