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Re: CONDUIT
- Subject: Re: CONDUIT
- Date: Fri, 9 Nov 2001 12:51:18 -0700 (MST)
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I guess this is out of date.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
> > knight@oak:/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
> > knight@oak:/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
> >
> > knight@oak:/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
> > >
> > >
> >
>
>