[61669] in North American Network Operators' Group
Re: IPv6 vs IPv4 (Re: Sprint NOC? Are you awake now?)
daemon@ATHENA.MIT.EDU (Jack Bates)
Tue Sep 2 18:52:25 2003
Date: Tue, 02 Sep 2003 17:48:03 -0500
From: Jack Bates <jbates@brightok.net>
To: Nenad Pudar <npudar@teleglobe.net>
Cc: Jared Mauch <jared@puck.Nether.net>,
Petri Helenius <pete@he.iki.fi>,
Joel Jaeggli <joelja@darkwing.uoregon.edu>,
neal rauhauser <neal@lists.rauhauser.net>,
Simon Lockhart <simon.lockhart@bbc.co.uk>, nanog@merit.edu
In-Reply-To: <3F55091F.3010200@teleglobe.net>
Errors-To: owner-nanog-outgoing@merit.edu
Nenad Pudar wrote:
> Again my point is that your site (or any other that use the same dns for
> ipv4 and 6) may be "blackholed" by ipv6 (it is not the question primary
> about the quality ipv6 connction it is the fact that your ipv4
> connection which may be excelant is blackholed with your ipv6 connection
> which may not be good and to me the most obvious solution is not to use
> the same dns name for both) for the people coming through 6bone or even
> for the majority of people not peering with Verio.
>
It's a valid point, except that IPv4 could just as easily have had a
problem. Network connectivity issues happen. Whether one uses IPv4 or
IPv6 in the connection is not decided by the server, but by the client.
If an IPv6 path is really bad, the client should switch to an IPv4 path
and vice versa. If the software in use by the client does not make this
easy, it is not the fault of the server.
Perhaps a better solution than different DNS names for IP versions
should be better client abilities. Is it unreasonable for the client
system to detect that the IPv6 path seems unreasonable and quickly check
to see if there is a better IPv4 path? Or perhaps the software utilizing
the IP stack should allow the user to specify which method they'd like
to utilize at that moment in time (ie, web-browser; view site with
IPv4|IPv6).
This would solve the problem you are indicating and not overcomplicate
the server side which is working fine. People don't want to learn to
type www.ipv6.example.com and www.ipv4.example.com. It makes much more
sense to just change the software to choose which method it wants. Not
that software vendors would incorporate such features.
-Jack
> This the trace from 6 bone looking glass
>
> traceroute6 to 2001:418:3f4:0:2a0:24ff:fe83:53d8
> (2001:418:3f4:0:2a0:24ff:fe83:53d8) from 2001:6b8::204, 30 hops max, 12
> byte packets
> 1 6bone-gw4 0.749 ms 0.537 ms 0.506 ms
> 2 gw1-bk1 1.103 ms 1.101 ms 1.046 ms
> 3 tu-16.r00.plalca01.us.b6.verio.net 186.424 ms 186.129 ms 187.344 ms
> 4 tu-800.r00.asbnva01.us.b6.verio.net 246.76 ms 246.798 ms 246.759 ms
> 5 t2914.nnn-7202.nether.net 458.76 ms 446.925 ms 496.061 ms
> 6 2001:418:3f4:0:2a0:24ff:fe83:53d8 450.172 ms 477.296 ms 453.895 ms
>
