[172399] in North American Network Operators' Group
Re: Applications that break when not using /64
daemon@ATHENA.MIT.EDU (Jeroen Massar)
Wed Jun 18 06:39:35 2014
X-Original-To: nanog@nanog.org
Date: Wed, 18 Jun 2014 12:39:21 +0200
From: Jeroen Massar <jeroen@massar.ch>
To: Grzegorz Janoszka <Grzegorz@janoszka.pl>, nanog@nanog.org
In-Reply-To: <53A16A95.4090405@Janoszka.pl>
Errors-To: nanog-bounces@nanog.org
On 2014-06-18 12:31, Grzegorz Janoszka wrote:
> On 17/06/14 23:13 , Jeroen Massar wrote:
>> Thus, can you please identify these applications so that we can hammer
>> on the developers of those applications and fix that problem?
>
> I haven't done extensive testing. I have just tried to divide a /64 into
> smaller subnets and to run Debian and Windows on it (as Matthew Petach
> did with his FreeBSD). I think I have tried /112 or /120. Debian was
> mostly fine, just one torrent or newsgroups client couldn't do v6 (can't
> recall which one), with Windows it was a different story and basically
> nothing really worked.
Why would a torrent client care about the prefix length?
But anyway, you had some random application that nobody uses that was
broken, seems to be a problem with that specific application, not
anything else.
> It was some time ago and I haven't tried Windows 7 SP1, maybe it has
> been fixed till now. Does anyone have Windows with IPv6 and netmask > /64?
I've only played with the NT4, Win2k, XP, and Vista stacks, and these
work fine in every scenario (/64 SLAAC, or /128 static config).
Hence you'll need to provide a lot more details than "it didn't work"...
Greets,
Jeroen
