All things related to multicast

[Al Adler <>]

Hi all;
    I think we may have fixed our little 65 second packet loss problem. As it
turns out every 65 seconds we were overflowing our frame relay broadcast queue
on the VBNS T1; it seems that VBNS would just stop accepting packets for a
couple of seconds and the overlflow would get dropped. As a workaround I've
enlarged the queue so that the packets aren't lost. We'll have to keep an eye
on the jitter this may cause but it's a definite improvement. Now all I have
to do is find someone at VBNS who knows something about frame relay setup.
Thanks to all for the debug assistance.

TTFN,
Al

Marshall  Eubanks wrote:

> If you could get the debug version at http://www.mctplayer.com/debug/
> it would be useful, if you can put it on a Linux box.
>
> > Marshall Eubanks wrote:
>
> >
> >> Hello;
> >>
> >> We have noticed an odd pattern of packet loss to nysernet (AS 3754) from
> >> MulticastTech
> >> (AS 16517).
> >
> > Are you seeing similar losses to Cornell (AS 26)?
> >
> > We have multicast peering with both NYSERNet (NYSERNet 2000) and vBNS,
> > and though I thought we were reaching you through our vBNS connection (a
> > lot has changed since then -- early Jan.), an mtrace on the access grid
> > beacon group looks similar to what you showed:
> >
> >
> > @pgp1$ mtr -s hendrix.multicasttech.com 233.2.171.1
> > Mtrace from 63.105.122.14 to 128.253.64.34 via group 233.2.171.1
> > Querying full reverse path...
> > 0  pgp1.cit.cornell.edu (128.253.64.34)
> > -1  rhodes1-8540-vl404.cit.cornell.edu (128.253.64.5)  PIM  thresh^ 0
> > [default]
> > -2  cornellnet3-gig1-0-0.cit.cornell.edu (128.253.222.161)  PIM/BGP4+
> > thresh^ 0  Reached RP/Core
> > -3  ? (199.109.2.30)  PIM  thresh^ 1
> > -4  clev-ipls.abilene.ucaid.edu (199.109.2.2)  PIM/BGP4+  thresh^ 0
> > Reached RP/Core
> > -5  ipls-clev.abilene.ucaid.edu (198.32.8.25)  PIM/BGP4+  thresh^ 0
> > Reached RP/Core
> > -6  jn1-at1-1-0-2008.dng.vbns.net (204.147.128.13)  PIM  thresh^ 1
> > -7  jn1-so7-0-0-0.nor.vbns.net (204.147.136.147)  PIM  thresh^ 1
> > -8  jn1-so7-0-0-0.wor.vbns.net (204.147.136.133)  PIM  thresh^ 1
> > -9  jn1-so7-0-0-0.wae.vbns.net (204.147.136.136)  PIM  thresh^ 1
> > -10  Multicast-inc.wae.vbns.net (204.147.129.90)  PIM  thresh^ 0
> > Reached RP/Core
> > -11  hendrix.multicasttech.com (63.105.122.14)
> > Round trip time 263 ms; total ttl of 10 required.
> >
> > -Phil
> >
> >
>
> --
>                                  Regards
>                                  Marshall Eubanks
>
> This e-mail may contain confidential and proprietary information of
> Multicast Technologies, Inc, subject to Non-Disclosure Agreements
>
> T.M. Eubanks
> Multicast Technologies, Inc
> 10301 Democracy Lane, Suite 410
> Fairfax, Virginia 22030
> Phone : 703-293-9624
> Fax     : 703-293-9609
> e-mail : 
> 
>      
>