Test your connectivity for World IPv6 Day

[Eric Vyncke (evyncke)]

OTOH, if 'we' do not test IPv6 to 1500 bytes on Wednesday, then when could we try? Or do we really want to be stuck with 1280 byte for ever?

Rémi, usually I am also advocating 1280 MTU on the server side, but, for W6D I would make an exception :-)

-éric

> -----Original Message-----
> From: ipv6-ops-bounces+evyncke=cisco.com at lists.cluenet.de [mailto:ipv6-ops-
> bounces+evyncke=cisco.com at lists.cluenet.de] On Behalf Of Rémi Després
> Sent: lundi 6 juin 2011 17:59
> To: owens at nysernet.org
> Cc: ipv6-ops at lists.cluenet.de; Jared Mauch
> Subject: Re: Test your connectivity for World IPv6 Day
> 
> 
> Le 6 juin 2011 à 00:00, Bill Owens a écrit :
> 
> > On Fri, Jun 03, 2011 at 07:53:24AM -0400, Jared Mauch wrote:
> >> On Thu, Jun 02, 2011 at 11:04:35AM +0200, Daniel Roesen wrote:
> >>> On Wed, Jun 01, 2011 at 09:53:55AM -0700, Seth Mattinen wrote:
> >>>> Both AfriNIC and ipv6.juniper.net are both working for me from work.
> >>>>
> >>>> traceroute to ipv6.juniper.net (2620:103:c003::10), 30 hops max, 40 byte
> >>>> packets
> >>>
> >>> The problem with ipv6.juniper.net is a PMTUD problem, not general
> >>> reachability problem...
> 
> Unless there are good reasons to know that a longer PMTU applies to all their
> connections, all servers SHOULD send IPv6 packets to off-link destinations
> with 1280 octets as default PMTU.
> Servers that don't do that are open for PMTU problems.
> 
> RD
> 
> 
> >>
> >> 	I've not had luck reaching anyone there.  If someone from Juniper
> >> is here please send me a note in private.
> >
> > Good luck with that. We discovered the PMTUD problem in February, told them
> about it in March. . . and April. . . and it's still broken.
> >
> > Anyway, if you have a FreeBSD or OS X box with non-tunneled IPv6
> connectivity, you can do the tests yourself:
> http://www.wand.net.nz/scamper/pmtud
> >
> > Bill.