[Bug 169809] ifup-ipv6 doesn't set sysctl net.ipv6.conf.$DEVICE.autoconf

bugzilla at redhat.com bugzilla at redhat.com
Fri Apr 4 10:41:14 UTC 2008


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Summary: ifup-ipv6 doesn't set sysctl net.ipv6.conf.$DEVICE.autoconf


https://bugzilla.redhat.com/show_bug.cgi?id=169809


pekkas at netcore.fi changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED
  Status Whiteboard| bzcl34nup                  |bzcl34nup
            Version|rawhide                     |8




------- Additional Comments From pekkas at netcore.fi  2008-04-04 06:41 EST -------
This problem still persists in Fedora 8.

I looked into this and the problem is that accept_ra toggle is changed in
ifup-ipv6.  However, ifup-ipv6 is called after IPv4 address assignment, DHCPv4
etc.  This is too late as you will already have obtained an IPv6 address or
gotten the kernel warning message.

This problem could be fixed by setting accept_ra etc. _before_ the link is up. 
The first place this happens appears to be in ifup when VLANs are created.  So,
I suppose these IPv6 settings would need to be added before that happens.

You can avoid the problem by putting IPV6_AUTOCONF=no into
/etc/sysconfig/network but that disables autoconf on every interface.

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