Routeur 1 | ipv6

```
interface Serial0/0
 encapsulation ppp
 ipv6 address 2001:db8:12::1/64
 no shutdown
 description ## to R2 ##

interface Serial0/1
 encapsulation ppp
 ipv6 address 2001:db8:51::1/64
 no shutdown
 description ## to R5 ##


 ipv6 route 2001:db8:23::/64 2001:db8:12::2
 ipv6 route 2001:db8:34::/64 2001:db8:12::2
 ipv6 route 2001:db8:45::/64 2001:db8:12::2
 ipv6 route ::/0 2001:db8:12::2


```

Routeur 2 | ipv6

```
interface Serial0/0
 encapsulation ppp
 ipv6 address 2001:db8:12::2/64
 no shutdown
 description ## to R1 ##

interface Serial0/1
 encapsulation ppp
 ipv6 address 2001:db8:23::2/64
 no shutdown
 description ## to R3 ##


 ipv6 unicast-routing
 ipv6 route 2001:db8:34::/64 2001:db8:23::1
 ipv6 route 2001:db8:45::/64 2001:db8:23::1
 ipv6 route 2001:db8:51::/64 2001:db8:23::1

```

Routeur 3 | ipv6

```
interface Serial0/1
encapsulation ppp
ipv6 address 2001:db8:23::1/64
no shutdown
description ## to R2 ##

interface Serial0/0
encapsulation ppp
ipv6 address 2001:db8:34::2/64
no shutdown
description ## to R4 ##


 ipv6 unicast-routing
 ipv6 route 2001:db8:45::/64 2001:db8:34::1
 ipv6 route 2001:db8:51::/64 2001:db8:34::1
 ipv6 route 2001:db8:12::/64 2001:db8:34::1


```

Routeur 4 | ipv6

```
interface Serial0/0
 encapsulation ppp
 ipv6 address 2001:db8:45::2/64
 no shutdown
 description ## to R5 ##

interface Serial0/1
 encapsulation ppp
 ipv6 address 2001:db8:34::1/64
 no shutdown
 description ## to R3 ##


  ipv6 unicast-routing
  ipv6 route 2001:db8:51::/64 2001:db8:45::1
  ipv6 route 2001:db8:12::/64 2001:db8:45::1
  ipv6 route 2001:db8:23::/64 2001:db8:45::1



```

Routeur 5 | ipv6

```
interface Serial0/1
 encapsulation ppp
 ipv6 address 2001:db8:51::2/64
 no shutdown
 description ## to R1 ##

interface Serial0/0
 encapsulation ppp
 ipv6 address 2001:db8:45::1/64
 no shutdown
 description ## to R4 ##


ipv6 unicast-routing
ipv6 route 2001:db8:12::/64 2001:db8:51::1
ipv6 route 2001:db8:23::/64 2001:db8:51::1
ipv6 route 2001:db8:34::/64 2001:db8:51::1

```