Re: packet duplication

From: Jim Warner (warner@cats.UCSC.EDU)
Date: Sun Dec 02 2001 - 01:27:52 EST


> What happens on a traceroute?

Good question. Implimentations that care about TTL values
complain when they pass this router. Running solaris snoop
during a trace shows that the (un)expected extra replies are
being received and ignorred by the program.

traceroute to www.santacruz.k12.ca.us (205.155.8.128): 1-30 hops, 38 byte packets
 1 comm-g-129.ucsc.edu (128.114.129.252) 33.5 ms 1.76 ms 1.66 ms
 2 frontdoor-GE1-0-0.ucsc.edu (128.114.103.1) 0.772 ms 0.679 ms 0.593 ms
 3 STAN--UCSC-gw.ATM.calren2.net (198.32.249.45) 3.23 ms 3.28 ms 3.36 ms
 4 SUNV--STAN.POS.calren2.net (198.32.249.73) 3.65 ms 3.42 ms 3.31 ms
 5 QSV-GSR--C2-QSV-GSR.CSU.net (137.145.11.5) 3.43 ms 3.65 ms 3.61 ms
 6 WEGSR-QSVGSR-ATM.CSU.net (137.145.202.126) 22.6 ms 22.7 ms 22.9 ms
 7 QAnhGSR-WestEdGSR-ATM.CSU.net (137.145.203.2) 23.5 ms 24.0 ms 24.7 ms
 8 DCP-QANH-GSR.GE.calren2.net (137.164.12.33) 23.9 ms (ttl=250!) 23.7 ms (ttl=250!) 24.0 ms (ttl=250!)
 9 WE-DCP--QANH-DCP-ATM.calren2.net (137.164.14.14) 25.3 ms (ttl=249!) 24.7 ms (ttl=249!) 24.4 ms (ttl=249!)
10 SLO-DCP--WE-DCP-ATM.calren2.net (137.164.14.13) 40.2 ms (ttl=248!) 39.7 ms (ttl=248!) 39.8 ms (ttl=248!)
11 QSal1-DCP--SLO-DCP-ATM.calren2.net (137.164.14.27) 43.0 ms (ttl=247!) 43.0 ms (ttl=247!) 41.9 ms (ttl=247!)
12 DCP-SCCOE-7507--DCP-QSAL-GSR1.DS3.calren2.net (137.164.2.153) 49.2 ms (ttl=246!) 49.4 ms (ttl=246!) 49.8 ms (ttl=246!)
13 198.189.240.73 (198.189.240.73) 49.8 ms (ttl=245!) 49.2 ms (ttl=245!) 49.1 ms (ttl=245!)
14 ns.santacruz.k12.ca.us (205.155.7.2) 50.5 ms (ttl=244!) * 49.8 ms (ttl=244!)



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