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Testing IPv6 support on th client's machine (Was: NANOG 40 agenda posted

  • From: Stephane Bortzmeyer
  • Date: Wed May 30 05:50:21 2007 
On Wed, May 30, 2007 at 10:55:04AM +1200,
 Nathan Ward <[email protected]> wrote 
 a message of 56 lines which said:

> Use Javascript, or flash, or some other fancy thing to do a GET for  
> two files on two different servers as the page loads:
> a) http://ip6test.<domain>/file
> b) http://ip4test.<domain>/file
> 
> And then compare the hit-rate for the two.

Very good idea. 

But you should also log the TCP RTT for the two connections because a
common failure is the fact that IPv4 goes straight to the server while
IPv6 goes through a tunnel in Thailand or Brazil.