I'm having a similar issue. I have disabled Route Advertisement (accept_ra=0) in sysctl.conf file, but at boot I still get a default IPv6 route to my router with an RA flag, which means it was assigned using a ra.
The default route expires soon after the boot, as it does not get renewed. This shows that the accept_ra=0 is actually working. It's not accepting route advertisements anymore, so this route does not get renewed. However, why do I still get the first route over RA? It's bugging my interface, as it has a gateway rule, but is not able to set it as there is already a default route assigned by a RA. I have no idea why it's even possible to get a route automatically before the actual interface is up (it's trying to assign the gateway I put in the interfaces file, but I get an error: File exists.). Only solution so far is removing the gateway line, causing the default route to appear automatically by RA and setting accept_ra to 1. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/997605 Title: Disabling IPv6 autoconfiguration in sysctl.conf doesn't affect boot process Status in linux package in Ubuntu: Confirmed Bug description: When you put the following lines in sysctl.conf net.ipv6.conf.all.autoconf = 0 net.ipv6.conf.all.accept_ra = 0 the expeced result is to disable IPv6 autoconfiguration at bootup, but, actually, it does nothing, because sysctl.conf network settings are applied after network has been started. So what happens: 1. Network interfaces are started by /etc/init.d/networking 1a. IPv6 uses autocnfiguratin, because it is enabled at this point 2. Sysctl.conf settings are applied by /etc/init/procps.conf I don't know if there is an easy solution, because inverting order things are called could break something else. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/997605/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
