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Re: 19991229: network access problems

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  • Subject: Re: 19991229: network access problems
  • Date: Wed, 29 Dec 1999 12:54:32 -0700 (MST)
Art,

I think the problem is on your end, around your psc.vbns router.  I would
contact your network folks asap. I did a ping and a traceroute, plus your
traceroutes confirms the same situation.

RObb...

(thelma:ldm) 109 % ping navier.meteo.psu.edu
PING navier.meteo.psu.edu (128.118.28.2): 56 data bytes

----navier.meteo.psu.edu PING Statistics----
39 packets transmitted, 0 packets received, 100.0% packet loss
(thelma:ldm) 110 % traceroute navier.meteo.psu.edu
traceroute to navier.meteo.psu.edu (128.118.28.2), 30 hops max, 40 byte
packets
 1  vbnsr-dmzfnet (192.52.106.10)  5 ms  4 ms  2 ms
 2  cs-atm6-0-501.dnj.vbns.net (204.147.130.205)  3 ms  4 ms  3 ms
 3  jn1-at1-0-0-0.dnj.vbns.net (204.147.136.82)  4 ms (ttl=252!)  3 ms
(ttl=252!)  3 ms (ttl=252!)
 4  cs-atm0-0-14.psc.vbns.net (204.147.131.173)  43 ms * *
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
(thelma:ldm) 111 % 





On Wed, 29 Dec 1999, Unidata Support wrote:

> >To: address@hidden
> >From: address@hidden (Arthur A. Person)
> >Subject: network access problems
> >Organization: .
> >Keywords: 199912291719.KAA11801
> 
> Hi...
> I lost connectivity from navier.meteo.psu.edu to thelma.ucar.edu
> back on the 22nd around 21Z.  When I ping thelma I get:
> 
>    ICMP Time exceeded in transit from ns-ga006.psc.vbns.net (204.147.130.1)
>    for icmp from navier (128.118.28.2) to thelma.ucar.edu (192.52.106.21)
> 
> When I do a traceroute, I get:
> 
> traceroute to thelma.ucar.edu (192.52.106.21), 30 hops max, 40 byte packets
>  1  128.118.28.1 (128.118.28.1)  1.085 ms  0.999 ms  0.586 ms
>  2  172.28.20.1 (172.28.20.1)  1.244 ms  1.120 ms  1.050 ms
>  3  Telecom2-ATM5-0-0.1.gw.psu.edu (128.118.44.5)  2.558 ms  1.304 ms  1.245 
> ms
>  4  198.32.224.47 (198.32.224.47)  7.115 ms  5.687 ms  7.897 ms
>  5  ns-ga006.psc.vbns.net (204.147.130.1)  6.009 ms  6.275 ms  5.884 ms
>  6  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  6.395 ms  6.116 ms  5.985 ms
>  7  ns-ga006.psc.vbns.net (204.147.130.1)  6.239 ms  6.349 ms  6.198 ms
>  8  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  6.567 ms  6.780 ms  6.475 ms
>  9  ns-ga006.psc.vbns.net (204.147.130.1)  6.575 ms  7.789 ms  6.745 ms
> 10  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  7.343 ms  6.941 ms  6.651 ms
> 11  ns-ga006.psc.vbns.net (204.147.130.1)  7.074 ms  7.328 ms  7.166 ms
> 12  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  7.178 ms  7.325 ms  7.404 ms
> 13  ns-ga006.psc.vbns.net (204.147.130.1)  6.987 ms  7.426 ms  7.554 ms
> 14  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  7.684 ms  7.628 ms  8.115 ms
> 15  ns-ga006.psc.vbns.net (204.147.130.1)  7.895 ms  8.064 ms  8.751 ms
> 16  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  8.856 ms  7.974 ms  7.939 ms
> 17  ns-ga006.psc.vbns.net (204.147.130.1)  8.423 ms  8.752 ms  8.335 ms
> 18  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  9.899 ms  8.623 ms  8.585 ms
> 19  ns-ga006.psc.vbns.net (204.147.130.1)  8.715 ms  9.683 ms  9.622 ms
> 20  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  11.155 ms  8.734 ms  9.074 ms
> 21  ns-ga006.psc.vbns.net (204.147.130.1)  9.531 ms  9.878 ms  9.364 ms
> 22  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  12.615 ms  9.041 ms  9.272 ms
> 23  ns-ga006.psc.vbns.net (204.147.130.1)  9.727 ms  9.910 ms  9.879 ms
> 24  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  9.962 ms  10.073 ms  10.068 ms
> 25  ns-ga006.psc.vbns.net (204.147.130.1)  10.235 ms  9.847 ms  10.202 ms
> 26  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  12.519 ms  10.464 ms  10.963 ms
> 27  ns-ga006.psc.vbns.net (204.147.130.1)  11.243 ms  10.410 ms  10.670 ms
> 28  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  10.926 ms  10.726 ms  10.576 ms
> 29  ns-ga006.psc.vbns.net (204.147.130.1)  10.799 ms  11.315 ms  10.464 ms
> 30  cs-atm0-0-7.psc.vbns.net (204.147.130.2)  11.240 ms  11.127 ms  11.055 ms
> 
> To temporarily remedy the problem, I switched to iita.rap.ucar.edu for
> a feed.  This worked fine until about 10Z the 25th when data stopped.
> iita pings fine, but in the ldm logs, it gave an access denied, as though
> someone had pulled the plug (unless the ldm had quit).  As a third resort
> I pointed the navier ldm to dusk.ssec.wisc.edu which worked and remains
> there now.  If I do a ping/traceroute from another system, e.g.
> stokes.meteo.psu.edu, it seems normal, so it's as though something
> specific has happened to the navier address regarding connectivity.
> 
> Any ideas?
> 
>                                            Thanks.
> 
>                                              Art.
> 
> 
> Arthur A. Person
> Research Assistant, System Administrator
> Penn State Department of Meteorology
> email:  address@hidden,  phone:  814-863-1563
> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================