All things related to multicast

[Alan Crosswell <>]

We do this for our commencement using a pair of MPEG-1 Vbricks.  But we don't 
want to block off-campus viewership of commencement so we use a GLOP address. 
Then we have a vbrick receiver which goes analog out into a real video encoder 
for the multicast-disabled viewers.

If you want to prevent escape use 239/8.  Everyone blocks that group at their 
PIM domain borders.

/a
PS: We NY tough guys stand in the rain for our commencement.  No wussing out:-) 
 In fact last commencement multicast viewers got to listen to the podium 
microphone shorting out when it filled with rain water.

John J. Brassil wrote:
> So this brings up an interesting point to me.  It has been awhile, but I 
> think the reason I chose that address in the first place was that I 
> wanted something that I thought would get filtered out if it ever 
> "escaped" into the wild.   Was that a good choice for that purpose 
> (local traffic only) or should I not be using addresses in this range at 
> all?
>
> More specifically, what I am doing with this group is hooking TV cameras 
> into the encoder for our commencement exercises and streaming the mpeg 
> feed back to decoders for the campus CATV system and a streaming media 
> encoder. So I get sweet, sweet point-to-multipoint *and* if Mr 
> Cloudburst comes along and we have to hustle from the lawn to the gym, 
> my techs don't have to worry about crossing uni subnet boundaries.
>
> I can envision the day when we'll want to pipe the mpeg stream 
> off-campus as well, but of course in that case we'll being using a 
> "routable" group.
>
> Thanks again to everyone for helping out with this, next Joint Techs I 
> manage to escape to, first round is on me.
>
> John
>
> --On Tuesday, July 27, 2004 7:07 PM -0500 Brent Sweeny 
> <> wrote:
>
> > On Tue, Jul 27, 2004 at 06:28:24PM -0400, Charles R. Anderson wrote:
> >
> > > Is Abilene filtering "multicast bogons" yet?  228/8 is listed as
> > > reserved by IANA:
> > >
> > > http://www.iana.org/assignments/multicast-addresses
> > >
> > > 225.000.000.000-231.255.255.255 Reserved             [IANA]
> >
> >
> >
> > good point. we're filtering MSDP announcements and forwarding to
> > some addresses, but not yet that one. (what we *are* filtering is
> > listed at the moment on the multicast 'cookbook' page; we're revising
> > the list very soon based on several suggestions and our draft revision
> > will be posted here soon.)
> >
> > --
> > Brent Sweeny            
> >
> >             812 / 855-5391
> > Indiana University Information Technology/Abilene Network Operations
> > PGP fingerprint = 0F 6B 7E 1D 3A AD F3 01  63 1E 2B B3 1E B1 FA 7F
>
>
>
> John J. Brassil | Network Engineer, Vanderbilt Data/Video Engineering
> voice 615.322.2496 | ICQ 9660375