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20041129: IDD feeds from atm.geo.nsf.gov
- Subject: 20041129: IDD feeds from atm.geo.nsf.gov
- Date: Mon, 29 Nov 2004 12:29:22 -0700
>From: "Patrick L. Francis" <address@hidden>
>Organization: Bowling Green State University
>Keywords: 200411291316.iATDGZlI028344 IDD
Hi Patrick,
>strange things are afoot at the circle K ...
>
>atm to weather/unidata.bgsu.edu showing monster latencies... internal and
>oar.net
>connectivity appears OK.
>
>http://my.unidata.ucar.edu/cgi-bin/rtstats/iddstats_nc?HDS+unidata.bgsu.edu
I looked at all of the feeds you are getting from atm.geo.nsf.gov
(namely, HDS, IDS|DDPLUS, and UNIWISC) and see the exact same latency
signature each one. The signatures are so consistent, that I am
assuming that your ~ldm/etc/ldmd.conf request line is for 'WMO' and
looks something like:
request WMO ".*" atm.geo.nsf.gov
A 'traceroute' from atm.geo.nsf.gov shows a big latency in simple ping
packets:
% traceroute unidata.bgsu.edu
traceroute to unidata.bgsu.edu (129.1.112.220), 30 hops max, 40 byte packets
1 colima.nsf.gov (198.181.231.1) 12 ms 15 ms 13 ms
2 arlg-nsf.maxgigapop.net (206.196.177.137) 7 ms 3 ms 7 ms
3 dcne-so3-0-0.maxgigapop.net (206.196.178.42) 8 ms 15 ms 14 ms
4 abilene-rtr.maxgigapop.net (206.196.177.2) 7 ms 9 ms 4 ms
5 nycmng-washng.abilene.ucaid.edu (198.32.8.84) 12 ms 17 ms 14 ms
6 chinng-nycmng.abilene.ucaid.edu (198.32.8.82) 36 ms 28 ms 27 ms
7 iplsng-chinng.abilene.ucaid.edu (198.32.8.77) 248 ms 243 ms *
8 clmbq-r2-po0-0.bb.oar.net (192.88.192.133) 35 ms 34 ms 34 ms
9 dytnq-r3-at1-0s16.bb.oar.net (192.88.191.101) 37 ms 37 ms 38 ms
10 bgsu2-r1-at2-0s103.cpe.oar.net (192.88.192.174) 60 ms 61 ms 61 ms
11 129.1.8.252 (129.1.8.252) 773 ms 737 ms 711 ms
12 129.1.8.125 (129.1.8.125) 749 ms 806 ms 815 ms
13 * * *
14 * * *
15 unidata.bgsu.edu (129.1.112.220) 858 ms 796 ms 741 ms
The bottleneck appears to be on the BGSU campus:
% awhois 129.1.8.252
OrgName: Bowling Green State University
OrgID: BGSU
Address: University Computer Services
Address: Math Science Building
City: Bowling Green
StateProv: OH
PostalCode: 43403
Country: US
NetRange: 129.1.0.0 - 129.1.255.255
CIDR: 129.1.0.0/16
NetName: BGSU
NetHandle: NET-129-1-0-0-1
Parent: NET-129-0-0-0-0
NetType: Direct Assignment
NameServer: NS1.BGSU.EDU
NameServer: NS2.BGSU.EDU
NameServer: NS1.OAR.NET
NameServer: NS2.OAR.NET
Comment:
RegDate: 1987-06-05
Updated: 2001-01-29
TechHandle: KS770-ARIN
TechName: Strickland, Kent
TechPhone: +1-419-372-2911
TechEmail: address@hidden
# ARIN WHOIS database, last updated 2004-11-28 19:10
# Enter ? for additional hints on searching ARIN's WHOIS database.
I would contact your campus network folks and initiate an inquiry
about the large latencies seen with 'traceroute'. I would also
do a 'traceroute' from unidata.bgsu.edu to atm.geo.nsf.gov to see
if the problem at 129.1.8.252 is bidirectional:
% traceroute atm.geo.nsf.gov
Please let us know the results of your 'traceroute'.
Cheers,
Tom
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