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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: ATM Traceroute middle packet loss?
> hmm.. > Seems that every traceroute across an ATM link will result in the middle > packet being dropped. The ATM Switch nor the Router have any idea that it > is the second packet.. weird! Anyone have a clue to why that is? > > Tracing the route to ns2 > 1 206.222.97.6 44msec 44msec 44msec > 2 ns2.acsi.net (206.222.97.50) 44 msec * 44 msec I don't think it has got anything to do with ATM. I bet you that ns2.acsi.net is a Solaris 2 box. Solaris drops every other icmp echo if it comes too close to the last one. This I was told is an inadvertent bug although Sun could claim it to be a feature against an ICMP flood attack ;-) Try tracerouting to sun.com (a SunOS box) and playground.sun.com (Solaris 2). You'll see the difference. Also try traceroute with the -q parameter greater than the default of 3 packets each destination. Sanjay. --------------------------------------------------------------- Web Professionals, Inc. 20370 Town Center Lane, Suite 245 +1 408-865-0899 Cupertino CA 95014 USA http://web.professionals.com --------------------------------------------------------------- World's largest Webspace provider with dedicated domain sites Ref: Open Market's Commercial Sites Index www.directory.net -- - - - - - - - - - - - - - - - - -
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