There is error using "ip" and "route" command when you want to add new route to ipv6. I experienced similar error programming routing protocol using netlink.
for 'ip" error: RTNETLINK answers: Invalid argument for "route" error: SIOCADDRT: Invalid argument e.g: ifconfig eth1 inet6 add 301::1/64 route -6 add 400::/64 gw 301::2 dev eth1 SIOCADDRT: Invalid argument ip -6 route add 400::/64 via 301::2 dev eth1 RTNETLINK answers: Invalid argument route -- version net-tools 1.60 using tap0 device it fails as well. Also using <linux/rtnetlink.h> library adding the route rule fails. Error [-22]. This does not work with latest Ubuntu distribution. Kernel version generic 2.6.31-14-generic. Any ideas how to fix it?
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