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Re: CONDUIT



Hi David, 

My records indicate that:

snow.cit.cornell.edu

is your primary feed and:

ldm.meteo.psu.edu

was your failover.

I guess this is out of date.

Are/were you experiencing latencies from snow, hence the change?

Could you give snow an ldmping and a traceroute, or if you know that
connect is bad, just let me know that is true, and we will update and
pursue flood at UIUC, just want to double check as they could be a source
for your NNEXRAD as well.

Same comment as Chiz, that 3rd hop off your campus seems to be the sticky
wicket...Often the traceroute to ldm.meteo.psu goes unresolved due to
firewall issues, so it may not be any better than flood, but we can
monitor latencies to figure that one out...at least at uiuc the connect
was solid.

Thank you,

-Jeff
____________________________                  _____________________
Jeff Weber                                    address@hidden
Unidata Support                               PH:303-497-8676 
NWS-COMET Case Study Library                  FX:303-497-8690
University Corp for Atmospheric Research      3300 Mitchell Ln
http://www.unidata.ucar.edu/staff/jweber      Boulder,Co 80307-3000
________________________________________      ______________________

On Fri, 9 Nov 2001, Steve Chiswell wrote:

> 
> 
> David,
> 
> I'll pass your FOS topo request on to Jeff Weber.
> 
> Looking at your traces, that 3rd hop on your own campus to 169.226.13.1 is a
> real killer. Is that always so bad?
> 
> Here's the info on 169.226.13.1
> 
> University at Albany, State University of New York (NET-U-ALBANY)
>    1400 Washington Av
>    Albany, NY 12222
>    US
> 
>    Netname: U-ALBANY
>    Netblock: 169.226.0.0 - 169.226.255.255
> 
>    Coordinator:
>       State University of New York at Albany Computing Services  (ZS161-ARIN)
> address@hidden
>       (518) 442-3700
> 
> Chiz
> 
> 
> 
> 
> 
> 
> 
> 
> 
> On Fri, 9 Nov 2001, David Knight wrote:
> 
> >
> > Hi Chiz,
> >      Yes we are still interested in the conduit feed.
> > Our connection to ldm.meteo.psu.edu is misearable.
> >
> > ldm.meteo.psu.edu is our official failover site for FOS
> > feed, and lately it has been just about unusable.
> >
> > I'll include the requested traceroute and ldmping below.
> >
> > While I'm sending this email, I wonder if I can also request
> > permission to use squall.atmos.uiuc.edu as our failover
> > feed site for FOS and NEXRAD. I've been monitoring the
> > network for the last week or so, and squall appears to
> > be a good site for us to use for IDD.
> >
> > Thanks
> > David
> >
> > David Knight
> > Department of Earth and Atmospheric Sciences   Tel: (518)-442-4204
> > University at Albany   ES-228                  Fax: (518)-442-4494
> > Albany, NY  12222                              Email: address@hidden
> >
> >
> > % traceroute ldm.meteo.psu.edu
> > traceroute to ldm.meteo.psu.edu (128.118.28.12), 30 hops max, 40 byte 
> > packets
> >  1  fire43.atmos.albany.edu (169.226.43.200)  0.579 ms  0.322 ms  0.296 ms
> >  2  be102 (169.226.4.1)  0.667 ms  0.645 ms  0.631 ms
> >  3  169.226.13.1 (169.226.13.1)  108.400 ms  109.095 ms  108.303 ms
> >  4  169.130.254.129 (169.130.254.129)  109.541 ms  109.791 ms  110.210 ms
> >  5  at-gsr1-nyc-3-0-OC12.appliedtheory.net (169.130.3.29)  112.955 ms  
> > 113.148 ms  113.118 ms
> >  6  12.125.51.209 (12.125.51.209)  119.826 ms  117.843 ms  114.151 ms
> >  7  gbr2-p70.n54ny.ip.att.net (12.123.1.134)  114.215 ms  114.790 ms  
> > 113.588 ms
> >  8  gbr3-p00.n54ny.ip.att.net (12.122.5.246)  114.455 ms  116.502 ms  
> > 114.944 ms
> >  9  gbr3-p30.wswdc.ip.att.net (12.122.2.166)  120.294 ms  122.175 ms  
> > 121.293 ms
> > 10  gbr2-p60.wswdc.ip.att.net (12.122.1.225)  120.310 ms  120.622 ms  
> > 121.624 ms
> > 11  gar1-p370.wswdc.ip.att.net (12.123.9.45)  121.357 ms  121.783 ms  
> > 120.983 ms
> > 12  12.124.235.74 (12.124.235.74)  131.018 ms  134.941 ms  134.580 ms
> > 13  penn-state-i1.psc.net (192.88.115.158)  139.296 ms  144.769 ms *
> > 14  * * *
> > 15  * * *
> > 16  * * *
> > 17  * * *
> > 18  * * *
> > 19  * *^C
> > address@hidden:/home/knight% traceroute flood.atmos.uiuc.edu
> > traceroute to flood.atmos.uiuc.edu (128.174.80.47), 30 hops max, 40 byte 
> > packets
> >  1  fire43.atmos.albany.edu (169.226.43.200)  0.564 ms  0.311 ms  0.298 ms
> >  2  be102 (169.226.4.1)  0.755 ms  0.652 ms  0.629 ms
> >  3  169.226.13.1 (169.226.13.1)  95.755 ms  96.738 ms  95.632 ms
> >  4  169.130.254.129 (169.130.254.129)  97.448 ms  97.934 ms  97.493 ms
> >  5  at-gsr1-nyc-3-0-OC12.appliedtheory.net (169.130.3.29)  100.663 ms  
> > 99.942 ms  99.759 ms
> >  6  169.130.3.130 (169.130.3.130)  100.184 ms  102.014 ms  100.519 ms
> >  7  jfk3-core5-s3-7.atlas.icix.net (165.117.56.253)  105.758 ms  101.296 ms 
> >  101.222 ms
> >  8  jfk3-core2-pos6-0.atlas.icix.net (165.117.48.161)  101.621 ms  101.878 
> > ms  101.362 ms
> >  9  ord2-core2-pos5-0.atlas.icix.net (165.117.48.38)  124.615 ms  125.255 
> > ms  125.299 ms
> > 10  ord2-core1-pos6-0.atlas.icix.net (165.117.48.85)  125.242 ms  125.698 
> > ms  125.121 ms
> > 11  198.187.52.170 (198.187.52.170)  125.343 ms  125.977 ms  126.876 ms
> > 12  206.166.8.90 (206.166.8.90)  132.193 ms  132.734 ms  133.879 ms
> > 13  uiuc-atmdmz-net.gw.uiuc.edu (192.17.8.32)  147.447 ms  150.430 ms  
> > 146.214 ms
> > 14  t-core1-1.gw.uiuc.edu (128.174.0.196)  146.547 ms  148.957 ms  148.473 
> > ms
> > 15  t-terra.gw.uiuc.edu (128.174.1.169)  159.425 ms  148.873 ms  155.723 ms
> > 16  flood.atmos.uiuc.edu (128.174.80.47)  146.978 ms  151.149 ms  147.183 ms
> > address@hidden:/home/knight% ldmping -i 2 -h ldm.meteo.psu.edu
> > Nov 09 18:45:56      State    Elapsed Port   Remote_Host           rpc_stat
> > Nov 09 18:46:06 SVC_UNAVAIL   9.997721    0   ldm.meteo.psu.edu  
> > h_clnt_create(ldm.meteo.psu.edu): Timed out while creating connection
> > Nov 09 18:46:08  ADDRESSED   0.000009    0   ldm.meteo.psu.edu  
> > h_clnt_create(ldm.meteo.psu.edu): Timed out while creating connection
> > Nov 09 18:46:25      NAMED  15.010783    0   ldm.meteo.psu.edu  can't 
> > contact portmapper: RPC: Timed out
> > ^C
> >
> > address@hidden:/home/knight% ldmping -i 2 -h flood.atmos.uiuc.edu
> > Nov 09 18:46:37      State    Elapsed Port   Remote_Host           rpc_stat
> > Nov 09 18:46:42 RESPONDING   4.821627  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:44 RESPONDING   0.160408  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:46 RESPONDING   0.164155  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:48 RESPONDING   0.162815  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:50 RESPONDING   0.165051  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:53 RESPONDING   0.165322  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:55 RESPONDING   0.176413  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:57 RESPONDING   0.166566  388   flood.atmos.uiuc.edu
> > Nov 09 18:46:59 RESPONDING   0.169433  388   flood.atmos.uiuc.edu
> >
> > > From address@hidden Fri Nov  9 18:28:21 2001
> > > Date: Fri, 9 Nov 2001 11:28:15 -0700
> > > From: Steve Chiswell <address@hidden>
> > > To: David Knight <address@hidden>
> > > Subject: CONDUIT
> > > MIME-Version: 1.0
> > >
> > >
> > > David,
> > >
> > > We seem to have the Internet2 feed of CONDUIT approaching a stable
> > > configuration:
> > > http://www.unidata.ucar.edu/staff/chiz/latency/stats/NMC2_motherlode.ucar.edu.gif
> > >
> > > At this point in time, redwood is still feeding from GSFC
> > > via the T-1. My initial inclination would be that you
> > > will probably get better results from either Penn State,
> > > or Illinois.
> > >
> > > If you can send me your traceroutes to
> > > ldm.meteo.psu.edu and flood.atmos.uiuc.edu
> > >
> > > and about 15 seconds of "ldmping -i 2 ......" for
> > > both of the above hosts, I'll see about getting your
> > > added to the topology (If you are still interested).
> > >
> > > Thanks,
> > >
> > > Chiz
> > >
> > >
> >
> 
> 


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