Skip to Content.
Sympa Menu

wg-multicast - Re: Session Announcement Help, Please!

Subject: All things related to multicast

List archive

Re: Session Announcement Help, Please!


Chronological Thread 
  • From: Marshall Eubanks <>
  • To: "Lucy E. Lynch" <>, Bill Fenner <>
  • Cc: "Michael H. Lambert" <>,
  • Subject: Re: Session Announcement Help, Please!
  • Date: Mon, 08 Jan 2001 13:41:51 -0500

"Lucy E. Lynch" wrote:

> mtrace 128.223.214.23 128.182.61.51
> Mtrace from 128.223.214.23 to 128.182.61.51 via group 224.2.0.1
> Querying full reverse path... * switching to hop-by-hop:
> 0 sandoz.psc.edu (128.182.61.51)
> -1 packet shorter (576 bytes) than hdr+data len (20+1016)
> * packet shorter (576 bytes) than hdr+data len (20+1016)
> * * Timed out receiving responses
> Perhaps receiver 128.182.61.51 is not a member of group 224.2.0.1,
> or no router local to it has a route for source 128.223.214.23,
> or multicast at ttl 64 doesn't reach its last-hop router for that source
>
> Lucy E. Lynch Academic User Services
> Computing Center University of Oregon
>
> (541) 346-1774
> Cell: (541) 912-7998
>
> Key fingerprint = 2C 80 2F 8C 5F 68 37 E3 AC 16 09 F1 36 E4 61 15
>
> On Mon, 8 Jan 2001, Michael H. Lambert wrote:
>
> > To update the responses I have received (thank you!):
> >
> > IOS Versions: internal router 12.1(3a)T1 [RSP2]
> > border router 12.0(12)S [RSP4]
> >
> > I changed the addresses of the RPs after verifying that the previous ones
> > didn't pass RPF checks in the Abilene core.
> >
> > I'm not sure how often the SDP announcement is being sent (it's being
> > originated by SDR under MS Windows and exhibiting the usual black-box
> > behavior of that OS). I'm going to see if I can get some of the tools up
> > under FreeBSD.
> >
> > Behavior I'm seeing now: The internal router carries the announcement for
> > three minutes; it disappears for a while (hard to time); it comes back for
> > another three minutes. It's not showing up in the sa-cache on the border
> > router at all.
> >
> > Any more hints?
> >
> > Thanks,
> >
> > Michael
> >

>

I believe that this doesn't tell much, as it doesn't know about the source -
there is no MSDP.

On my router, at least, I can only mtrace to sources that I can see
anyway.

Maybe Bill has something to add.

--
Regards
Marshall Eubanks

T.M. Eubanks
Multicast Technologies, Inc
10301 Democracy Lane, Suite 410
Fairfax, Virginia 22030
Phone : 703-293-9624
Fax : 703-293-9609
e-mail :




http://www.on-the-i.com http://www.buzzwaves.com





Archive powered by MHonArc 2.6.16.

Top of Page