Does BIND9 support broadcast/multicast query?

[Danny Mayer]

Hideshi Enokihara wrote:
> Thank you for your reply.
> 
> On Mon, 26 Dec 2005 09:58:54 -0800 (PST)
> Gregory Hicks <ghicks at cadence.com> wrote:
> 
> 
>>>Date: Mon, 26 Dec 2005 19:30:23 +0900
>>>From: Hideshi Enokihara <Hideshi.Enokihara at jp.yokogawa.com>
>>>To: bind-users at isc.org
>>>Subject: Does BIND9  support broadcast/multicast query?
>>>
>>>Hi all,
>>>
>>>I have a simple question for BIND9.
>>>
>>>Does BIND9 support a UDP query that is delivered using an IP
>>>broadcast or multicast address?
>>
>>broadcast/multicast is handled by the router long before the request
>>ever reaches the server.  As far as the SERVER is concerned, it just
>>sees a request and processes normally.
> 
> 
> I see.
> But RFC1123 says,
> 
>             A server MAY support a UDP query that is delivered using an
>             IP broadcast or multicast address.  However, the Recursion s
>             Desired bit MUST NOT be set in a query that is multicast,
>             and MUST be ignored by name servers receiving queries via a
>             broadcast or multicast address. 
> 
> So, I think that sarver may support a broadcast or multicast query, Not router.
> How do you think?
> 
The only part of RFC 1123 that is relevant to this question as far as I
could see was Section 6.1.3.2 where the discussion at the end of the
section discourages broadcast and multicast for finding name servers.
I don't remember seeing RFC's suggesting that nameservers support
broadcast or multicast for anything.

Danny