[avahi] browsing for services on a specific multicast address

[Marc Krochmal]

The Mac tool is not browsing a specific Multicast address.  It's just  
using the DNS-SD subtype feature.  You're browsing "_ftp._tcp" with a  
subtype of "225_0_10_100".  All packets are still being sent to the  
link-local Multicast address assigned to mDNS (224.0.0.251).



On Mar 16, 2009, at 10:47 AM, Alon Noy wrote:

> Well, if the mac util dns-sd can browse a specific multicast address
> (dns-sd -B 225_0_10_100._ftp._tcp) then I would expect that it's a
> zeroconf functionality. They did came up initially with zeroconf,  
> right?
>
> But nevermind, I guess I'll have to snoop the multicast address  
> myself.
>
>
> -----Oorspronkelijk bericht-----
> Van: avahi-bounces at lists.freedesktop.org
> [mailto:avahi-bounces at lists.freedesktop.org] Namens Lennart Poettering
> Verzonden: maandag 16 maart 2009 17:03
> Aan: avahi at lists.freedesktop.org
> Onderwerp: Re: [avahi] browsing for services on a specific multicast
> address
>
> On Mon, 16.03.09 13:46, Alon Noy (Alon.Noy at ilsemedia.nl) wrote:
>
>>
>> I don't have any documentation to contribute but I can explain the
>> logic:
>> A large amount of file servers (it's not really ftp) are being split
>> into clusters, when a file is added to one server in the cluster it  
>> is
>> being replicated on different nodes within the cluster (for
> availability
>> and backup). The construction of clusters gives the possibility to
> have
>> different clusters for different purposes on one local network.
>>
>> If this functionality is not supported on the client side will it be
>> possible to configure the daemon to listen to a specific multicasting
>> address?
>
> No. The mdns spec only defines 224.0.0.251 as mDNS multicast group and
> that's why we use it. I see no reason to support a different address.
>
> I am sorry, but I don't really understand what you are trying to do. I
> kind of get the feeling you are misusing the mcast functionality for
> something where VLANs should be used instead.
>
> Lennart
>
> -- 
> Lennart Poettering                        Red Hat, Inc.
> lennart [at] poettering [dot] net         ICQ# 11060553
> http://0pointer.net/lennart/           GnuPG 0x1A015CC4
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