Primero configuramos las interfaces de cada router sin olvidar ipv6 unicast-routing en el modo de configuración global
R1
interface Loopback0 no ip address ipv6 address 2001:AAAA:CCCC::1/64 end interface Serial0/0 no ip address ipv6 address 2001:AAAA:AAAA::1/64 ipv6 address FE80::1 link-local serial restart-delay 0 endR2
interface Serial0/0 no ip address ipv6 address 2001:AAAA:AAAA::2/64 ipv6 address FE80::2 link-local serial restart-delay 0 end interface Serial0/1 no ip address ipv6 address 2001:AAAA:BBBB::2/64 ipv6 address FE80::3 link-local serial restart-delay 0 endR3
interface Loopback0 no ip address ipv6 address 2001:AAAA:DDDD::1/64 end interface Serial0/1 no ip address ipv6 address 2001:AAAA:BBBB::1/64 ipv6 address FE80::4 link-local serial restart-delay 0 endVemos como quedan las interfaces después de la configuración:
R1
R1#sh ipv6 int brie | excl admin
Serial0/0 [up/up]
FE80::1
2001:AAAA:AAAA::1
Loopback0 [up/up]
FE80::FFFF:FE10:45C5
2001:AAAA:CCCC::1
R2Serial0/0 [up/up]
FE80::2
2001:AAAA:AAAA::2
Serial0/1 [up/up]
FE80::3
2001:AAAA:BBBB::2
R3Serial0/1 [up/up]
FE80::4
2001:AAAA:BBBB::1
Loopback0 [up/up]
FE80::FFFF:FE10:45C5
2001:AAAA:DDDD::1
Puesto que los routers no tienen ninguna ip en formato ipv4 hay que crear obligatoriamente un ID de 32 bits para cada uno.R1
*Mar 1 00:41:08.575: %OSPFv3-4-NORTRID: OSPFv3 process 1 could not pick a router-id, ipv6 router ospf 1 router-id 0.0.0.1R2
ipv6 router ospf 1 router-id 0.0.0.2R3
ipv6 router ospf 1 router-id 0.0.0.3
Y por último habilitamos el enrutamiento, diciendo en cada interfaz que habla ipv6 que área va a enrutar, el comando network queda desfasado en RIP OSPF y EIGRP
R1
interface loopback 0
ipv6 ospf 1 area 0
interface serial0/0
ipv6 ospf 1 area 0
R2interface serial0/0
ipv6 ospf 1 area 0
interface serial0/1
ipv6 ospf 1 area 0
R3interface serial0/1
ipv6 ospf 1 area 0
Vemos que al hacer show ip protocols dice porque interfaces habla OSPF pongo de ejemplo R1:R1#sh ipv6 pro
IPv6 Routing Protocol is "connected"
IPv6 Routing Protocol is "static"
IPv6 Routing Protocol is "ospf 1"
Interfaces (Area 0):
Loopback0
Serial0/0
Redistribution:
None
Ahora todo queda perfectamente enrutadoR1
R1#sh ipv6 route ospf
IPv6 Routing Table - 8 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
O 2001:AAAA:BBBB::/64 [110/128]
via FE80::2, Serial0/0
O 2001:AAAA:DDDD::1/128 [110/128]
via FE80::2, Serial0/0
Como ocurre en ospf normal las loopback se anuncian como /32 en ipv4 en ipv6 son /128. Probamos la conectividadR1#ping 2001:aaaa:dddd::1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2001:AAAA:DDDD::1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 32/46/60 msTambien se puede observar la inclusión de un nuevo tipo de LSA, TIPO 8 que anuncia las Link-Local Address
Ejemplo en R3
R3#sh ipv6 ospf database
OSPFv3 Router with ID (0.0.0.3) (Process ID 1)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits
0.0.0.1 278 0x80000004 0 1 None
0.0.0.2 267 0x80000003 0 2 None
0.0.0.3 87 0x80000002 0 1 None
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface
0.0.0.2 276 0x80000001 5 Se0/1
0.0.0.3 268 0x80000001 5 Se0/1
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID
0.0.0.1 1437 0x80000003 0 0x2001 0
0.0.0.2 272 0x80000002 0 0x2001 0
0.0.0.3 87 0x80000002 0 0x2001 0

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