All things related to multicast

[Lea Roberts <>]

hello everyone!

the simple answer is that it was an MSDP propagation issue for an ASM
application.

the bug was in Cisco IOS (I can look back for the bug ID if there's any
interest) where the remote source address would take tens of seconds to
propagate from one router to the next...  once we zeroed in what was
happening, it took a while to get the answer but once the code was all
upgraded things have been workihg fine in the normal path.  Now I'll let
Steve Senger comment on how they've continued to find other sites that
need to upograde their Cisco routers...

Lea Roberts
Stanford Network Operations

On Tue, 25 Oct 2005, Russ Hobby wrote:

> I wasn't directly involved with the problem or the solution but I will get
> the details and report back. (or if any of you on the list were involved
> you can report directly ;-)
>
> Russ
>
> At 06:01 AM 10/25/2005, Russ Hobby wrote:
> >Hi All,
> >
> >I have been asked a question from a researcher who's project has been
> >trying to use multicast for some time with many problems, and she asked me
> >"Are we trying to do the impossible?"
> >
> >Their particular use of multicast relies on multiple multicast connections
> >and for them to be set up in a timely fashion.  It is the setup time for a
> >connection with which they have been having trouble.  Connections can take
> >up to several minutes to be established.  They have worked the problem out
> >with a couple of campuses and a gigapop to get it to work (which had to
> >wait for new router codes to be installed in several places).  However
> >every time they go to a new site, they are likely to have the problem
> >again and they have to work it through those network engineers.
> >
> >So the researcher is asking if they should give up on multicast and
> >redesign their application.  What do you think?
> >
> >Russ
>