[Fwd: Fwd: RE: [AG-TECH] ddvic error]

[Bob Riddle]

  Bob,

I have no idea what this is at the *.189, but we're looking for this 
machine and will pull the plug ...

the *.66 machine, vrvs-ag.internet2.edu is a machine we've made 
available to VRVS to setup as a backup bridge for the VRVS-AG bridge. 
 I've copied Philippe (and VRVS support) thinking that perhaps they've 
begun to configure and deploy that software ... Philippe?

-------- Original Message --------
Subject: Fwd: RE: [AG-TECH] ddvic error
Date: Thu, 07 Nov 2002 15:27:13 -0500
From: Chris Goosman <goose at internet2.edu>
To: Bob Riddle <bdr at internet2.edu>



Did you see this?

>Delivered-To: goose at internet2.edu
>Date: Wed, 6 Nov 2002 14:54:18 -0600 (CST)
>From: Bob Olson 
>To: s-slocombe at northwestern.edu,
>         "'Rabarison Monika Klara'" 
>Cc: darin at ucar.edu, ag-tech at mcs.anl.gov, support at vrvs.org
>Subject: RE: [AG-TECH] ddvic error
>X-Spam-Status: No, hits=-3.9 required=5.0 tests=IN_REP_TO,X_NOT_PRESENT 
>version=2.21
>X-Spam-Level:
>Sender: owner-ag-tech at mcs.anl.gov
>X-Virus-Scanned: by AMaViS 0.3.12pre8
>
>Curiouser and curiouser.
>
>1036615485.732686 RTCP len=124 from=207.75.164.189:1263
>  (SR ssrc=0x3dcd9dc4 p=0 count=1 len=12
>ntp=3245604283.3556234125 ts=135639818 psent=2231590 osent=451735965
>   (ssrc=3dcd9dc4 fraction=0 lost=0 last_seq=2231590 jit=0 lsr=0 dlsr=0)
>  )
>  (SDES p=0 count=1 len=17
>   (src=0x3dcd9dc4
>CNAME="bdr at 207.75.164.189" TOOL="vic-2.8ucl-1.1.3-AG/Windows
>NT-5.1-intel" )
>  )
>
>followed by
>
>1036615485.800790 RTCP len=124 from=207.75.164.66:42003
>  (SR ssrc=0x3dcd9dc4 p=0 count=1 len=12
>ntp=3245604283.3556234125 ts=135639818 psent=2231590 osent=451735965
>   (ssrc=3dcd9dc4 fraction=0 lost=0 last_seq=2231590 jit=0 lsr=0 dlsr=0)
>  )
>  (SDES p=0 count=1 len=17
>   (src=0x3dcd9dc4
>CNAME="bdr at 207.75.164.189" TOOL="vic-2.8ucl-1.1.3-AG/Windows
>NT-5.1-intel" )
>  )
>
>that appears to be the same packet coming from two different IP
>addresses. What's running on 207.75.164.66, aka vrvs-ag.internet2.edu? Is
>it looping multicast traffic back to the group?
>
>Sure looks like it is. Started up another here at ANL, rtpdump shows this:
>
>1036615929.725220 RTP len=629 from=140.221.9.223:33899 v=2 p=0 x=0 cc=0
>m=1 pt=31 (H261,0,90000) seq=1655 ts=1954856438 ssrc=0x3dd8a696
>1036615929.847436 RTP len=629 from=207.75.164.66:42002 v=2 p=0 x=0 cc=0
>m=1 pt=31 (H261,0,90000) seq=1655 ts=1954856438 ssrc=0x3dd8a696
>
>Whoever's running this bridge, please make it stop. I've verified that
>quitting one of these sources that's getting reflected causes vic to
>crash. (The reflector is causing invalid RTP to be present on the wire -
>multiple sources with one SSRC).
>
>  --bob

Chris Goosman * Internet2 * Applications Technician
goose at internet2.edu http://www.internet2.edu
V:734-352-4991
C:734-645-6186
F:734-913-4255