Re: IP Multicast, MADCAP, etc.
Re: IP Multicast, MADCAP, etc.
- Subject: Re: IP Multicast, MADCAP, etc.
- From: Peter John Hill <email@hidden>
- Date: Sat, 23 Aug 2003 10:16:45 -0400
Well, there a GLOP addresses, if you have your own AS. If you don't you
can ask you service provider. I am guessing you are asking for a global
multicast address, since you can use a site local or link local
multicast address freely as you'd like (and only upset the people in
your own site if you step on someone else).
Here are some helpful links:
INTERNET MULTICAST ADDRESSES
http://www.iana.org/assignments/multicast-addresses
Multicast Address Allocation (MALLOC) Working Group - Documents
http://www.icir.org/malloc/documents.html
IANA Application for Multicast Address
http://www.iana.org/cgi-bin/multicast.pl
GLOP Addressing in 233/8
http://www.faqs.org/rfcs/rfc3180.html
All of your answers can be found in the links above
Peter Hill
Network Engineer
Carnegie Mellon University
On Saturday, August 23, 2003, at 12:22 AM, Adam Paul Coates wrote:
Heya, folks,
Does anyone know what the state of IP multicast regulation is these
days?
It used to be that there was a huge block of "transient" addresses that
you could just use -- unfortunately, I suspect IANA stepped in to
prevent
collision problems. I've found a bit of information about restrictions
and some protocols for allocation and advertisement, but it's pretty
sparse.
Windows supports the MADCAP protocol with special APIs which allow you
to
request multicast addresses and release them using a MADCAP/DHCP
server.
Is anything like this supported under OS X or will I have to write it
myself? Is this even necessary?
There's also the SDP/SAP protocol for advertising servers.
Unfortunately
the address allocation is pretty crude, and I don't want to step on
anyone's toes in the course of snatching of 5 or so addresses.
In short, what's the "accepted" thing to do if you'd like to use IP
multicast for streaming/whatever with your own app? I could just
hard-code an address -- but it seems like this isn't being a very good
Netizen and might not even work if they ever adjust the forwarding
boundaries.
Thanks in advance for any help,
Adam C.
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