IPv6 Nightmares. Why cant I not use!

[Fabio Massimo Di Nitto]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

mark wrote:

|>>IPv6.  Your suggested fix may not be the most "elegant", but it
|>>certainly works.
|>>
|>>Would it be possible to use "modprobe -r" to more cleanly stop IPv6?

No, this is a "problem" in the linux kernel.

|>
|>But I agree, there should be a more elegant way of doing it in an
|>elegant
|>distro like Ubuntu.

|
| Well, I had to try it.  Unfortunately, -modprobe -rv ipv6- returns a
| FATAL error, stating that "ipv6 is in use".  Sigh...
|
|

When the ipv6 module is loaded, it is immediatly marked as in use.
The main problem is that it is not possible for the kernel to tell
applications that a protocol is going away.
iirc it is missing such a signal around and each application should be
able to reconfigure itself. That's a pretty dangerous operation to
perform, specially if you are using that protocol at unload time.
There is also the problem for the kernel to understand which application
is using the protocol.

There were several long discussions on the linux kernel mailing list
explaining all the details of such operation. but in very short is not
possible.

Fabio

PS In my short version of the story i might have missed some of the
reasons (i don't recall all of them myslef).

- --
<user> fajita: step one
<fajita> Whatever the problem, step one is always to look in the error log.
<user> fajita: step two
<fajita> When in danger or in doubt, step two is to scream and shout.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
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=CRs9
-----END PGP SIGNATURE-----