North American Network Operators Group
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RE: SOLVED! The cause of puzzling TCP (eg. WHOIS) connectionfailureswith some InterNIC.net hosts

  • From: Marc Slemko
  • Date: Fri Nov 20 19:56:11 1998 
On Fri, 20 Nov 1998, Rubens Kuhl Jr. wrote:

> > The problem in this case is probably the load balancing systems that
> > NSI is now using, which have known bogus behaviour when interacting
> > with PMTU-D.  NSI should disable PMTU-D on their servers until they
> > can fix this problem; fixing this problem probably involves having
> > the vendor for their load balancing boxes fixing their broken
> > software.
> 
> What load balancing systems are known to mess up with PMTU-D ?

I would suggest that it appears that NSI is, as has previously been
mentioned on the list and f5's web page, using f5's BIG/ip boxes.