North American Network Operators Group
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Re: Network for Sale

  • From: Paul A Vixie
  • Date: Wed Feb 21 15:38:39 2001 
>> Oh god, I hope not.  RTT has never been an accurate predictor of end-to-end
>> performance. (Just ask anyone who bought into ping-based global server load
>> balancing.)  ASPATH length is almost as bad (as a predictor) as RTT.
> 
> well, it's the way icmp_echo is handeld in some vendor routers and
> sometime also the poor implementation of an IP stack on the echoing
> device which is a problem.

no, that is not the problem.  oh i admit that ping time jitter is ~random.
but even if it weren't, RTT doesn't drive performance, (bw*delay)-loss does.