[Xastir] New England feed down?

Gerry Creager N5JXS gerry.creager at tamu.edu
Tue Apr 12 10:32:38 EDT 2005


It's not well coordinated between ISPs and carriers, mainly because it's 
not well implemented by some (major) hardware vendors.  My preference 
for hardware for both IPv4 and IPv6 multicast says "Juniper" on the 
front.  Nortel handles it OK, too.  Cisco does fine for Cisco-to-Cisco 
stuff for v4 multicast, and pretty well works with the other players for 
v6 multicast.  Note that there are only a handful of ISPs and carriers 
that offer IPv6 multicast...

Some campuses allow it to support the ghosting disk imaging protocols, 
and Novell uses multicast (using registered, well-known multicast 
addresses belonging to other services!) for discovery...  so some folks 
intentioanlly limit its travels.

I'd love to see it more widespread.  I think it's got a LOT of potential 
for APRS-IS when it's widely available.

Gerry


Mark - N2PGD wrote:
> Jason,
> 
> 
>>I'm a bit behind on the state of multicasting on the Internet in 
>>general, but would it be better to start arranging for multicast feeds 
>>instead of many point to point feeds?  Is Internet multicasting ready 
>>for primetime?
> 
> 
> My experience with multicast so far is that it just isn't ready for
> prime time.   It seems very prone to random outages and requires a lot
> of coordination between ISPs.  We've even had issues with different OS
> revs on routers playing nicely with each other when it comes to
> multicast.  We use it with great success on campus, even around the
> state, helps to be in a really small state ;), where things can be carefully 
> controlled.  I2 players are pretty good, but I1 is way behind.
> 
> I honestly don't know why it's taking so long to catch on.
> 
> Mark
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