What eric is refering to is a couple different items. One is the forward lookup of the name given on the command prompt, which I don't recall any traceroute implementations which cause high latency for that. Secondly is the reverse lookup many traceroute's will do if you give an IP address as the destination. Many of these send the first packet out, then make a call for reverse lookup. Sun Solaris is the notable OS who does this with ping and causes the first response(s) to be reported as extremely high latency due to the program waiting on the reverse lookup to finish. 3rd is the reverse lookup of individual hops as seen in traceroute output. I can't recall any implementation mangling RTT results due to this, but I wouldn't be surprised to see it. Mostly this just delays the next round packets from being sent. Finally kernel level ICMP rate limiting has been done in a number of OS's and makes agressive ping tests a poor tool. And makes using low rate ping against a busy host something to trust with skepitism.
I doubt you are seeing any of these Mike, but just wanted to clarify why someone would see those kinds of results. I know I've had to have long conversations explaining these things to *nix admins who believed the network had extremely high latency. :-) There is obviously something going on, not sure what it is myself. I agree with the other posters that L2 could be causing performance problems. Have you broken down testing so it's not just end-to-end between these two windows hosts but also from one windows host to each of the endpoints along the way? Has IKE finished already when you send these packets? Are the lifetimes of your SA's long enough or are they aging out between individual test packets? Darrell ""Mike Sweeney"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > In answer to Eric, there is not any DNS involved as the traceroute is IP > only... no name resolution needed. > > In answer Ed's comments, I have both plugged into a switch and so it's not > *back to back* in the normal sense of the word. > > MikeS Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61235&t=60981 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
