ipv6 forwarding
!
interface r3-eth0
 ipv6 address 2001:db8:2::1/64
!
ipv6 route fc00:1::/64 fc00:100::1234
ipv6 route fc00:2::/64 fc00:100::1234
ipv6 route fc00:3::/64 fc00:100::1234