[nsp] Odd traceroutes

From: Deepak Jain (deepak@ai.net)
Date: Thu Oct 21 1999 - 18:34:35 EDT


This might have to go on a Sun-specific list, but has anyone noticed the
following behavior: A traceroute goes fine through even many hops, but
on last hop, if its a sun server, the -middle- interval shows up as a
star, on otherwise pristine connections.

Like:

(from UUNET)

traceroute to allison.clark.net (207.97.14.170), 30 hops max, 40 byte packets
 1 passepartout.web.us.uu.net (208.240.88.1) 249.671 ms 4.546 ms
0.587 ms
 2 Serial1-1-1.GW2.DCA1.ALTER.NET (137.39.128.205) 3.342 ms 1.765 ms
2.373 ms
 3 105.ATM3-0.XR1.DCA1.ALTER.NET (146.188.161.42) 3.454 ms 1.865 ms
1.483 ms
 4 295.ATM1-0.TR1.DCA1.ALTER.NET (146.188.161.142) 1.691 ms 1.604 ms
1.720 ms
 5 101.ATM6-0.TR1.EWR1.ALTER.NET (146.188.136.186) 7.428 ms 7.212 ms
7.128 ms
 6 197.ATM7-0.XR1.NYC1.ALTER.NET (146.188.178.213) 6.281 ms 6.900 ms
6.834 ms
 7 195.ATM11-0-0.BR1.NYC1.ALTER.NET (146.188.177.153) 6.723 ms 7.078
ms 6.819 ms
 8 uunet.nyc1.verio.net (129.250.9.61) 7.423 ms 7.773 ms 7.620 ms
 9 nyc1.phl02.verio.net (129.250.3.125) 9.886 ms 9.035 ms 9.415 ms
10 phl02.phl00.verio.net (129.250.3.153) 8.898 ms 8.947 ms 8.066 ms
11 phl00.iad3.verio.net (129.250.3.105) 8.251 ms 8.219 ms 7.780 ms
12 iad3.dca0.verio.net (129.250.2.62) 7.917 ms 8.052 ms 10.563 ms
13 vma1.dca.verio.net (129.250.30.170) 137.615 ms 10.677 ms 347.567 ms
14 fa0-0-0.mae-east6.vma.verio.net (207.22.81.1) 8.990 ms 20.398 ms
113.581 ms
15 allison.clark.net (207.97.14.170) 11.210 ms * 11.294 ms

--

Nitrous, different target

Tracing the route to sprawl.clark.net (198.17.243.6)

1 iad1-core4-pos1-0.atlas.digex.net (165.117.52.186) 0 msec 0 msec 0 msec 2 dca1-core10-pos4-2.atlas.digex.net (165.117.53.33) 0 msec 4 msec 0 msec 3 verio.dca1.atlas.digex.net (165.117.52.242) 0 msec 4 msec 4 msec 4 iad3.dca0.verio.net (129.250.2.62) [AS 2914] 4 msec 4 msec 4 msec 5 vma1.dca.verio.net (129.250.30.170) [AS 2914] 4 msec 0 msec 56 msec 6 fe2-0-0.mae-east.vma.verio.net (207.22.81.16) [AS 2914] 28 msec 4 msec 16 msec 7 168.143.0.27 [AS 2914] 4 msec * 4 msec

---

Every sun machine (2.5.1, 2.6, 2.7, latest patches) I have tried over a wan does this, over the lan, they are fine. Non-sun machines don't do this (bsd, etc) that I have seen. I have tried multiple types of traceroutes through different networks and different providers.

Any clues or am I just imagining things?

Deepak Jain AiNET



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