Who is using ipv6 ... where to start.

Jonathan Ryshpan jonrysh at pacbell.net
Mon Jun 21 19:48:48 UTC 2004

On Mon, 2004-06-21 at 06:20, Michael H. Warfield wrote:
> On Sun, Jun 20, 2004 at 09:26:48PM -0700, T. 'Nifty New Hat' Mitchell wrote:
> ...
> 	Judging from the amount of smtp traffic I get on IPv6 into my MX
> server and the amount of DNS traffic to and from my DNS servers as they talk
> to other DNS servers on IPv6, I would have to say a LOT more than most
> people on this list would even begin to suspect.  It also explains the
> Mozilla slowdown when you have IPv6 enabled but are not globally routed
> to IPv6.  Mozilla receives AAAA records for a URL and tries them before
> it tries the A records.  When it receives an unreachable error or a
> timeout, then it tries the A record.  That's why it appears to be slow.
> If you run into a slow site, try running the command "host -t AAAA [host]"
> and see if it has any IPv6 addresses.  If it does (and more and more do)
> that's your answer.

Extremely interesting:

        $ host -t AAAA www.nytimes.com
        $ host www.nytimes.com
        www.nytimes.com has address
        www.nytimes.com has address
        www.nytimes.com has address
        www.nytimes.com has address
        $ host -t AAAA doubleclick.com
        $ host doubleclick.com
        doubleclick.com has address

Two very important URL's (to me at least) that don't have ipv6 addresses
right now -- just as I suspected.


More information about the fedora-list mailing list