[25352] in North American Network Operators' Group
Re: Real Media and M-Bone feeds
daemon@ATHENA.MIT.EDU (Phillip Vandry)
Tue Oct 5 23:27:09 1999
Date: Tue, 5 Oct 1999 23:08:31 -0400 (EDT)
From: Phillip Vandry <vandry@Mlink.NET>
Message-Id: <199910060308.XAA03078@Iodine.Mlink.NET>
To: Jeff Mcadams <jeffm@iglou.com>
Cc: nanog@merit.edu
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
In-reply-to: Your message of "Tue, 05 Oct 1999 22:24:23 EDT."
<19991005222423.B777@iglou.com>
Errors-To: owner-nanog-outgoing@merit.edu
> >Easily. It is called cacheing. Multicasting provides exactly the
> >same bandwidth savings as cacheing with cache retention time set to zero.
>
> With the constraint that if you want to provide exactly the same
> bandwidth savings, you have to have a cache at every hop. Without a
> cache at every hop, there still can be significant savings, but not
> quite equal to the bandwidth savings of multicast at every hop.
> (Though, admittedly, multicast capable routers aren't available at every
> hop either).
Except that you probably don't care about every hop either (who cares if
the 100Mbps to my access server with 4 T1's on it is partially wasted?).
-Phil
