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Re: barak-online.net icmp performance vs. traceroute/tcptraceroute, ssh, ipsec

  • From: Min
  • Date: Mon May 07 21:18:53 2007
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After all the discussion, the difference of last hop of the trace
(from original email)
15 89.1.148.230.dynamic.barak-online.net (89.1.148.230) 251.923 ms 
256.817 ms *
And the ping result
64 bytes from 89.1.148.230: icmp_seq=6 ttl=240 time=190 ms 
is still quite interesting.  I assumed the last hop is the cisco 871
(IP=89.1.148.230).
It will be good to know what cause the difference if you have full
controll of the 871.

Min

On 5/7/07, Lincoln Dale <[email protected]> wrote: 

> Lower than 1500 mtu always requires some kind of hack in real life.
>
> That would be the adjust-mss which is the hack-of-choice

note that using 'adjust-mss' only adjusts the MSS for TCP.
it won't do much good for already-encapsulated IPSec traffic with protocol 47
or tunneled over UDP...



cheers,

lincoln.