My mistake. I meant /proc/sys, not /sys. Specifically, the "files" under /proc/sys/net/ipv6/conf.
I'll try the INITRD_MODULES string for loading the ipv6 module earlier and see if that causes the /proc/sys files that sysctl is trying to write to to appear earlier. IPv6 support is limited to Layer-2 VSwitches and GuestLANs. Layer-3 VSwitches are documented as IPv4 only: http://www.vm.ibm.com/networking/ipv6/ipv6tabl.html On Thu, May 5, 2011 at 2:14 PM, Mark Post <[email protected]> wrote: > >>> On 5/5/2011 at 12:49 PM, Christian Paro <[email protected]> > wrote: > -snip- > > Putting the ipv6 kernel module in the initrd should solve the problem of > the > > module not being loaded on time. But I'm not sure it would solve the > issue > > of the sysctls not having the corresponding sysfs nodes to configure > (since > > these, I gather, are created as the network is being brought up). And, > > To my knowledge, the sysctl command doesn't even look at /sys, only /proc. > > > unless there's an easier and "safer" way to modify the initrd for SLES > than > > unpacking it to a temporary location, adding/modifying files, and > repacking > > it with gzip and cpio, I'm not sure this is an approach I would advocate > for > > administrators who aren't used to building kernels/ramdisks (or are > nervous > > about breaking support agreements and assumptions). I know I'm used to > doing > > these kinds of modifications on personal systems, but personally would > > prefer to stick with the distro-provided kernel and initial ramdisk for > > anything being used in a production environment. > > This I can help with. Add "ipv6" to the INITRD_MODULES string in > /etc/sysconfig/kernel and re-run mkinitrd. That's why it's there. > > -snip- > > Also, using a layer-3 vswitch prevents autoconfiguration. But it also > > prevents the use of IPv6 altogether for interfaces backed by that switch, > > Oh? That's news to me. If correct, that sounds like a bug in CP. > > > Mark Post > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
