When I ran 'sysctl -w net.ipv6.conf.all.forwarding=1', I saw the following in dmesg output.
[ 1368.082196] sysctl: The scan_unevictable_pages sysctl/node-interface has been disabled for lack of a legitimate use case. If you have one, please send an email to linux-mm@xxxxxxxxx.
[ 1368.082196] sysctl: The scan_unevictable_pages sysctl/node-interface has been disabled for lack of a legitimate use case. If you have one, please send an email to linux-mm@xxxxxxxxx.
What's more, in my Cubieboard3 using the linux-sunxi kernel, the set of ipv6.conf.all.forwarding will disable my IPv6 access.