Router
! Enable IPv6 routing
ipv6 unicast-routing
! Configure subinterface for VLAN 10
interface GigabitEthernet0/0/0.10
encapsulation dot1Q 10
ipv6 address 2001:db8:1000:10::1/64
no shutdown
! Configure router-to-router interface
interface Serial0/1/0
ipv6 address FD00:0:0:1::0/127
no shutdown
! Add static route to remote site
ipv6 route 2001:db8:2000::/48 FD00:0:0:1::1