Re: schein.debian.org

Henrique de Moraes Holschuh <[email protected]> writes:

> On Wed, 01 Jun 2011, Jonathan McCrohan wrote:
>> On 01/06/11 00:01, Gerald Turner wrote:
>> > Can anyone else confirm or deny IPv6 security updates mirror at
>> > schein.debian.org is operational (virtual host,
>> > security.debian.org, makes this a bit difficult to test)?
>>
>> I can confirm that apt-get updates are stalling at the following line
>> for upwards of 10 seconds.
>> [Connecting to security.debian.org (2001:4f8:8:36::6)]
>>
>> Both my servers (UK and US based) seem to experience this problem so
>> I suspect it is not related to any particular geolocation server.
>
> The output of traceroute seems to show that schein has a good
> connection to the V6 internet, as it is hosted at ISC.
>
> Please check the MTUs recorded in the route cache:
>   ip -6 route get 2001:4f8:8:36::6
>

  2001:4f8:8:36::6 from :: via 2001:470:e861::1 dev eth0  src 2001:470:e861::8  metric 0
    cache  expires 510sec mtu 1480 advmss 1440 hoplimit 4294967295

> And also run a MTU check on your connection to schein.  It has to be
> above 1280, and it it has to match whatever the kernel recorded in the
> route cache.  I think package "iputils-tracepath" can do it, but I
> haven't checked (I am not in a IPv6-capable network).
>

Looks like it's 1480:

 $ tracepath6 schein.debian.org
  1?: [LOCALHOST]                        0.031ms pmtu 1480
  1:  shub-niggurath.unzane.com                             0.162ms
  1:  shub-niggurath.unzane.com                             0.360ms
  2:  gturner-1.tunnel.tserv14.sea1.ipv6.he.net             6.576ms
  3:  gige-g2-6.core1.sea1.he.net                           5.654ms
  4:  10gigabitethernet9-1.core1.sjc2.he.net               26.522ms
  5:  10gigabitethernet3-2.core1.pao1.he.net               34.657ms
  6:  he.pao1.isc.org                                      29.855ms
  7:  int-0-0-0.r1.sjc3.isc.org                            31.418ms asymm 5
  8:  schein.debian.org                                    27.519ms reached
      Resume: pmtu 1480 hops 8 back 59

-- 
Gerald Turner   Email: [email protected]   JID: [email protected]
GPG: 0xFA8CD6D5  21D9 B2E8 7FE7 F19E 5F7D  4D0C 3FA0 810F FA8C D6D5

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)

iEYEARECAAYFAk3mnokACgkQP6CBD/qM1tUiowCeNEc2mWpI43TqGLciywZClC3M
oM0AmwfYyumTJKwlS7C7zvhmF1WVRrrn
=vKuQ
-----END PGP SIGNATURE-----