Hello,
i got native ipv6 with one of my internet access.
I set the interface as default ipv6 gw and put the gw ipv6
Without uplink balancing enable, everything works fine.
I got a second internet access but without ipv6, i wan't to use this access too, but when i enable uplink balancing, ipv6 don't work anymore.
i got a no route to host when i try a ping6
Actually, the only way to make it work again without disabling uplink balancing is to add manually (in ssh) a default ipv6 route.