netdev - Re: LInux kernel 3.0 sit creation bug report

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Message-Id: <E1QkxaG-0003gS-Ux@dex.edzone.net>
Date:	Sun, 24 Jul 2011 08:15:00 -0400 (EDT)
From:	Jay Rouman <jsr@....edzone.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: LInux kernel 3.0 sit creation bug report

Thank you for the reply.  I was not aware that sit0 was deprecated,
but something has changed in 3.0.  The "SIOCSIFDSTADDR: No buffer
space available" error does not happen in 2.6.39.  The Linux-net-tools
command creates a working tunnel to Hurricane Electric's tunnel broker,
even though the error message is generated.  I have tried the route-2
commands and while they work without error, I can't get the tunnel to
function.  I get I never tried the route-2 (/bin/ip) setup in 2.6.39.
--
Jay Rouman (jsr@...ter.mi.org jsr@...one.net)


/sbin/ifconfig sit0 inet6 tunnel ::<ip address>
> Le samedi 23 juillet 2011 ? 12:27 -0400, Jay Rouman a ?crit :
> > Kernel 3.0 (release version)
> > Summary:  sit tunnel creation fails with "No buffer space available"
> > 
> > Example:
> > 
> > icebox:/home/u/jsr(3)# /sbin/ip tunnel add sit0 mode sit local 216.111.203.89 remote 209.51.18.1 ttl 255
> > add tunnel sit0 failed: No buffer space available
> > 
> > icebox:/home/u/jsr(8)# /sbin/ifconfig sit0 inet6 tunnel ::209.51.18.1
> > SIOCSIFDSTADDR: No buffer space available
> > 
> > Notes:
> > 
> > Oddly, the ifconfig example creates a working sit0.  The "ip" example
> > does not.  The problem existed in rc1 but unfortunately I did not test
> > sit creation then.  This was discovered when I upgraded a machine with
> > an HE tunnel to the 3.0 kernel.  I am happy to do further testing or
> > provide whatever additional info I can.
> > 
> 
> I believe you use a deprecated (~10 years ago ?) way to setup your
> tunnel, its not a linux-3.0 new behavior.
> 
> sit0 is reserved (fall back tunnel), you should use a different name.
> 
> Try :
> 
> # ip tunnel add aster mode sit local 216.111.203.89 remote 209.51.18.1 ttl 255
> # ifconfig aster up
> 
> # ip tunnel
> sit0: ipv6/ip  remote any  local any  ttl 64  nopmtudisc
> aster: ipv6/ip  remote 209.51.18.1  local 216.111.203.89  ttl 255 
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