[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Yesterday's latencies

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: Re: Yesterday's latencies
  • Date: Tue, 25 Sep 2001 20:50:31 -0600
Harry Edmon wrote:
> 
> It is happening again:
> 
> 3 sunny% /usr/sbin/traceroute motherlode.ucar.edu
> traceroute to motherlode.ucar.edu (128.117.13.119): 1-30 hops, 38 byte packets
>  1  dustbuster-V3.cac.washington.edu (128.95.89.100)  0.976 ms  0.976
> ms  0.977 ms
>  2  uwbr2-GE3-0.cac.washington.edu (140.142.153.24)  0.976 ms  0.0 ms
> 0.977 ms
>  3  hnsp1-wes-ge-0-0-0-0.pnw-gigapop.net (198.107.150.11)  0.976 ms
> (ttl=252!)  0.0 ms (ttl=252!)  0.977 ms (ttl=252!)
>  4  198.48.91.78 (198.48.91.78)  0.976 ms  0.976 ms  0.977 ms
>  5  dnvr-sttl.abilene.ucaid.edu (198.32.8.50)  35.1 ms  29.2 ms  28.3 ms
>  6  ncar-abilene.ucar.edu (128.117.243.125)  462 ms  419 ms  447 ms
>  7  vbnsr-n243-104.ucar.edu (128.117.243.105)  406 ms  465 ms  407 ms
>  8  mlrb-n2.ucar.edu (128.117.2.254)  417 ms  410 ms  363 ms
>  9  motherlode.ucar.edu (128.117.13.119)  392 ms  383 ms  383 ms
> 
> When I checked earlier today, the roundtrip time was uner 50 ms,
> instead of the current 400 ms.  There is definitely something wrong at
> the NCAR - Abilene interface.
> >

Hi again Harry, Daryl, and Art,

Harry and Daryl, thanks for the notification.  I just had a long
conversation with one of our network engineers.  The problem may simply
be congestion.  I need to contact them when it's happening.  I will try
to keep an eye on things, but I would appreciate it if, again, you would
contact me when you see it. 

Thanks!

Anne
-- 
***************************************************
Anne Wilson                     UCAR Unidata Program            
address@hidden                  P.O. Box 3000
                                  Boulder, CO  80307
----------------------------------------------------
Unidata WWW server       http://www.unidata.ucar.edu/
****************************************************