R1和R6直接相連
簡要配置：
R1配置：
ipv6 unicast-routing
interface Loopback0
no ip address
ipv6 address 2::2/64
!
!
interface Serial0/1
no ip address
ipv6 address 1::1/64
serial restart-delay 0
!
ipv6 route 3::/64 Serial0/1
!
R6的配置：
ipv6 unicast-routing
interface Loopback0
no ip address
ipv6 address 3::3/64
interface Serial0/1
no ip address
ipv6 address 1::2/64
!
ipv6 route 2::/64 1::1