RE: All-DHCP-Relays: use ?

The scope of this multicast is not link-local, but AS scope.
I guess this MC address is used to contact the DHCP server(s) directly across subnet boundaries, without relays.

Geert

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Carlos G Mendioroz
Sent: maandag 4 juni 2012 11:53
To: Mukom Akong T.
Cc: Cisco certification
Subject: Re: All-DHCP-Relays: use ?

There are 3 addresses and 3 functions in DHCPv6:

Clients, that send to FF02::1:2 (all agents, link local).
Agents can be either servers (which deal with the request) or relays, which relay the request to FF05::1:3 (all servers, site local).

But there is a FF05::1:4 address, which is cited as all-relays in some places and all-agents in others. It is not described in RFC3315 and I have not seen any place where its use is described.

All this addresses are mcast.
-Carlos

Mukom Akong T. @ 04/06/2012 00:49 -0300 dixit:
> On Jun 2, 2012, at 10:37 PM, Carlos G Mendioroz<tron_at_huapi.ba.ar> wrote:
>
>> Hi there,
>> I'm trying to find out what is ALL-DHCP-Relays (IPv6 anycast WKA FF05::1:4) used for, but so far, no luck.
>>
>> Any hints ?
>
> I am yet to lab this up to verify. If u make a a router a dhcpv6
> relay, it should start listening to that group address. Dhcp clients
> will send the messages to that address as well as there are no
> broadcasts in v6.
>
>
>
>> --
>> Carlos G Mendioroz<tron_at_huapi.ba.ar> LW7 EQI Argentina
>>
>>
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--
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net