Running DHCPv6 relay without interfaces

[Chuck Anderson]

On Thu, Mar 14, 2013 at 08:56:33AM -0400, Neff, Glen wrote:
> On 03/14/2013 01:02 PM, ameen.shajahan at wipro.com wrote:
> > >
> > > Can I able to run
> > > DHCPv6 relay with single interface
> 
> > dhcrelay -6 -l eth0 -u eth0
> 
> > > or without interface?
> 
> no idea
> 
> This makes no sense.  If you don't have multiple interfaces, then
> you shouldn't need a relay.

I do see a use case.  You might want to force all DHCPv6 transactions
to use relay agent so relay agent options can be added, but you might
only have a single LAN.  For example, you might want to implement this
about-to-become-RFC:

https://datatracker.ietf.org/doc/draft-ietf-dhc-dhcpv6-client-link-layer-addr-opt/

There is also the Lightweight DHCP Relay Agent which might be useful
to have an implementation of:

https://tools.ietf.org/html/rfc6221