[38679] in North American Network Operators' Group
Re: Multicast Traffic on Backbones
daemon@ATHENA.MIT.EDU (Tim Winders)
Sun Jun 10 13:50:26 2001
Date: Sun, 10 Jun 2001 12:49:34 -0500 (CDT)
From: Tim Winders <twinders@SPC.cc.tx.us>
To: Michael Whisenant <mwhisen@foreigner.whisenant.net>
Cc: <nanog@merit.edu>
In-Reply-To: <Pine.LNX.4.33.0106100704130.9619-100000@foreigner.whisenant.net>
Message-ID: <Pine.OSF.4.33.0106101246200.252696-100000@barney.spc.cc.tx.us>
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On Sun, 10 Jun 2001, Michael Whisenant wrote:
> On Sat, 9 Jun 2001, Tim Winders wrote:
>
> > AT&T has most/all of their backbone natively multicast enabled and will
> > multicast enable customer access routers upon request. They do have a
> > setup fee, but no monthly recurring fees.
>
> Fundamentally is that not the way that it should be?
Yes, I agree.
> I think that if I were an AT&T customer I am paying for the ability to
> flow bits at whatever speed my link or service contract was permitted.
> It should not depend if those bits are multicast bits or unicast bits.
> Then in my selection of a provider the provider that offered me more
> features for the same dollar would have a larger value and ultimately
> win my decision process.
Again, I agree. I am struggling with this issue right now.
> > UUnet has two levels of multicast capabilities. Their "Basic" package is
> > receive only and is free. Their "Gold" package is full send/receive, but
> > they charge a ton for it. The basic package seems pretty useless to me.
> > To join a multicast group, you have to be able to send to it, right?
>
> If you are wanting to receive multicast traffic of a live event for
> example, no you would not have to send to the multicast group. Your client
> would send an IGMP join request to the (*,Group) and then ultimately receive
> (host, Group) of data. Your clients and routes only need to know that there is
> a host registered to receive the data, then they will not PRUNE the flow.
Thanks, Michael. I had one other person inform me that JOIN requests are
done with IGMP. I appreciate the correction.
=== Tim
**********************************************
Tim Winders, MCSE, CNE, CCNA
Associate Dean of Information Technology
South Plains College
Levelland, TX 79336
Phone: 806-894-9611 x 2369
FAX: 806-894-1549
Email: TWinders@SPC.cc.tx.us
**********************************************
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