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Re: 20040225:BGSU latencies

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  • Subject: Re: 20040225:BGSU latencies
  • Date: Thu, 26 Feb 2004 08:56:09 -0700 (MST)
Patrick,

I am seeing a bottleneck coming into bgsu...

/local/ldm/etc% traceroute weather.bgsu.edu
traceroute to weather.bgsu.edu (129.1.112.37), 30 hops max, 40 byte
packets
 1  colima.nsf.gov (198.181.231.1)  3 ms  1 ms  1 ms
 2  arlg-nsf.maxgigapop.net (206.196.177.137)  4 ms  1 ms  1 ms
 3  dcne-so3-0-0.maxgigapop.net (206.196.178.42)  4 ms  2 ms  3 ms
 4  abilene-rtr.maxgigapop.net (206.196.177.2)  3 ms  18 ms  2 ms
 5  nycmng-washng.abilene.ucaid.edu (198.32.8.84)  6 ms  6 ms  8 ms
 6  chinng-nycmng.abilene.ucaid.edu (198.32.8.82)  29 ms  26 ms  26 ms
 7  iplsng-chinng.abilene.ucaid.edu (198.32.8.77)  30 ms  30 ms  41 ms
 8  bbq2-pos0-0.ohio-gigapop.oar.net (192.88.192.133)  34 ms  34 ms  34 ms
 9  dlp3-atm1-0s16.ohio-gigapop.oar.net (192.88.191.101)  37 ms  37 ms  37 ms
10  bgsu-atm2-0s103.ohio-gigapop.oar.net (192.88.192.174)  56 ms  56 ms  56 ms
11  129.1.8.252 (129.1.8.252)  64 ms  1057 ms  1944 ms
12  129.1.8.125 (129.1.8.125)  1086 ms  992 ms  858 ms
13  * * *
14  * * *
15  weather.bgsu.edu (129.1.112.37)  514 ms  74 ms  555 ms



Hops 11 and 12 concern me....

I assume 13 and 14 are behind a firewall so cannot resolve, but 1000+ ms
is not OK.

Can you contact your IT dept to see if they are doing anything to restrict
flow through those nodes (hops)..it looks goood up to :

10  bgsu-atm2-0s103.ohio-gigapop.oar.net (192.88.192.174)  56 ms  56 ms  56 ms


Curious...

Jeff
---------------------------------------------------------------------
Jeff Weber                                    address@hidden        :
Unidata Program Center                        PH:303-497-8676        :
University Corp for Atmospheric Research      3300 Mitchell Ln       :
http://www.unidata.ucar.edu/staff/jweber      Boulder,Co 80307-3000  :
---------------------------------------------------------------------

On Wed, 25 Feb 2004, Patrick L. Francis wrote:

>  > We have gotten worse..unexplainable.
>
> what is really interesting are the inconsistencies... i.e. periods of
> 'near perfection'
>
> >Will you please send me a copy of your ldmd.conf?
>
> absolutely.. note attachment
>
>
> >Are both "tagged" as PRIMARY as of 23Z 2/25?
>
> yes.
>
> >traceroute atm.geo.nsf.gov
>
> absolutely... attached two of them (one file)... looks like a gigapop issue
>
> Cheers!
>
> --patrick
>
>
> ------------------------------------------
> Patrick L. Francis
> Department of Geography
> Bowling Green State University
> Office 301-F Hanna Hall
> Phone 419.372.4185
> Fax: 419.372.0588
> Web: http://weather.bgsu.edu/
> ------------------------------------------
>