Introducción
Este documento describe una configuración para configurar un túnel IPv6, basado en ruta, de sitio a sitio entre dos routers Cisco que utilizan el protocolo Intercambio de claves de Internet versión 2 (IKEv2).
Prerequisites
Requirements
Cisco recomienda que tenga conocimiento sobre estos temas:
- Conocimientos fundamentales de la configuración CLI de Cisco IOS®/Cisco IOS® XE
- Conocimientos fundamentales de los protocolos IPsec y ISAKMP (Internet Security Association and Key Management Protocol)
- Comprensión del direccionamiento y el routing IPv6
Componentes Utilizados
La información que contiene este documento se basa en estas versiones de software:
- Cisco IOS XE con 17.03.04a como router local
- Cisco IOS que ejecuta 17.03.04a como router remoto
La información que contiene este documento se creó a partir de los dispositivos en un ambiente de laboratorio específico. Todos los dispositivos que se utilizan en este documento se pusieron en funcionamiento con una configuración verificada (predeterminada). Si tiene una red en vivo, asegúrese de entender el posible impacto de cualquier comando.
Configurar
Diagrama de la red
Configuraciones de router local
Paso 1. Habilitación del routing unidifusión IPv6.
ipv6 unicast-routing
Paso 2. Configure las interfaces del router.
interface GigabitEthernet1
ipv6 address 2001:DB8:1::1/64
no shutdown
interface GigabitEthernet2
ipv6 address FC00::1/64
no shutdown
Paso 3. Establecer la ruta predeterminada de IPv6.
ipv6 route ::/0 GigabitEthernet1
Paso 4. Configuración De La Propuesta Ikev2.
crypto ikev2 proposal IKEv2-PROP
encryption aes-cbc-128
integrity sha1
group 14
Paso 5. Configuración De La Política Ikev2.
crypto ikev2 policy IKEv2-POLI
proposal IKEv2-PROP
Paso 6. Configure el llavero con una clave previamente compartida.
crypto ikev2 keyring IPV6_KEY
peer Remote_IPV6
address 2001:DB8:2::2/64
pre-shared-key cisco123
Paso 7. Configure el perfil Ikev2.
crypto ikev2 profile IKEV2-PROF
match identity remote address 2001:DB8:2::2/64
authentication remote pre-share
authentication local pre-share
keyring local IPV6_KEY
Paso 8. Configure la política de la Fase 2.
crypto ipsec transform-set ESP-AES-SHA esp-aes esp-sha-hmac
mode tunnel
Paso 9. Configure el perfil IPsec.
crypto ipsec profile IPSEC-PROF
set transform-set ESP-AES-SHA
set ikev2-profile IKEV2-PROF
Paso 10. Configure la interfaz de túnel.
interface Tunnel1
ipv6 address 2001:DB8:3::1/64
tunnel source GigabitEthernet1
tunnel mode ipsec ipv6
tunnel destination 2001:DB8:2::2
tunnel protection ipsec profile IPSEC-PROF
end
Paso 11. Configure las rutas para el tráfico interesante.
ipv6 route FC00::/64 2012::1
Configuración final del router local
ipv6 unicast-routing
!
interface GigabitEthernet1
ipv6 address 2001:DB8:1::1/64
no shutdown
!
interface GigabitEthernet2
ipv6 address FC00::1/64
no shutdown
!
ipv6 route ::/0 GigabitEthernet1
!
crypto ikev2 proposal IKEv2-PROP
encryption aes-cbc-128
integrity sha1
group 14
!
crypto ikev2 policy IKEv2-POLI
proposal IKEv2-PROP
!
crypto ikev2 keyring IPV6_KEY
peer Remote_IPV6
address 2001:DB8:2::2/64
pre-shared-key cisco123
!
crypto ikev2 profile IKEV2-PROF
match identity remote address 2001:DB8:2::2/64
authentication remote pre-share
authentication local pre-share
keyring local IPV6_KEY
!
crypto ipsec transform-set ESP-AES-SHA esp-aes esp-sha-hmac
mode tunnel
!
crypto ipsec profile Prof1
set transform-set ESP-AES-SHA
!
crypto ipsec profile IPSEC-PROF
set transform-set ESP-AES-SHA
set ikev2-profile IKEV2-PROF
!
interface Tunnel1
ipv6 address 2001:DB8:3::1/64
tunnel source GigabitEthernet1
tunnel mode ipsec ipv6
tunnel destination 2001:DB8:2::2
tunnel protection ipsec profile IPSEC-PROF
end
!
ipv6 route FC00::/64 2012::1
Configuración ISP
ipv6 unicast-routing
!
!
interface GigabitEthernet1
description Link to R1
ipv6 address 2001:DB8:1::2/64
!
interface GigabitEthernet2
description Link to R3
ipv6 address 2001:DB8:2::1/64
!
!
!
ipv6 route 2001:DB8:1::/64 GigabitEthernet1
ipv6 route 2001:DB8:2::/64 GigabitEthernet2
!
Configuración final del router remoto
ipv6 unicast-routing
!
interface GigabitEthernet1
ipv6 address 2001:DB8:2::2/64
no shutdown
!
interface GigabitEthernet2
ipv6 address FC00::2/64
no shutdown
!
ipv6 route ::/0 GigabitEthernet1
!
crypto ikev2 proposal IKEv2-PROP
encryption aes-cbc-128
integrity sha1
group 14
!
crypto ikev2 policy IKEv2-POLI
proposal IKEv2-PROP
!
crypto ikev2 keyring IPV6_KEY
peer Remote_IPV6
address 2001:DB8:1::1/64
pre-shared-key cisco123
!
crypto ikev2 profile IKEV2-PROF
match identity remote address 2001:DB8:1::1/64
authentication remote pre-share
authentication local pre-share
keyring local IPV6_KEY
!
crypto ipsec transform-set ESP-AES-SHA esp-aes esp-sha-hmac
mode tunnel
!
crypto ipsec profile Prof1
set transform-set ESP-AES-SHA
!
crypto ipsec profile IPSEC-PROF
set transform-set ESP-AES-SHA
set ikev2-profile IKEV2-PROF
!
interface Tunnel1
ipv6 address 2001:DB8:3::2/64
tunnel source GigabitEthernet1
tunnel mode ipsec ipv6
tunnel destination 2001:DB8:1::1
tunnel protection ipsec profile IPSEC-PROF
end
!
ipv6 route FC00::/64 2012::1
Verificación
On Router 1
R1#show crypto ikev2 sa
IPv4 Crypto IKEv2 SA
IPv6 Crypto IKEv2 SA
Tunnel-id fvrf/ivrf Status
2 none/none READY
Local 2001:DB8:1::1/500
Remote 2001:DB8:2::2/500
Encr: AES-CBC, keysize: 256, PRF: SHA256, Hash: SHA256, DH Grp:14, Auth sign: PSK, Auth verify: PSK
Life/Active Time: 86400/75989 sec
R1#show crypto ipsec sa
interface: Tunnel1
Crypto map tag: Tunnel1-head-0, local addr 2001:DB8:1::1
protected vrf: (none)
local ident (addr/mask/prot/port): (::/0/0/0)
remote ident (addr/mask/prot/port): (::/0/0/0)
current_peer 2001:DB8:2::2 port 500
PERMIT, flags={origin_is_acl,}
#pkts encaps: 14, #pkts encrypt: 14, #pkts digest: 14
#pkts decaps: 14, #pkts decrypt: 14, #pkts verify: 14
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. failed: 0
#pkts not decompressed: 0, #pkts decompress failed: 0
#send errors 0, #recv errors 0
local crypto endpt.: 2001:DB8:1::1,
remote crypto endpt.: 2001:DB8:2::2
plaintext mtu 1422, path mtu 1500, ipv6 mtu 1500, ipv6 mtu idb GigabitEthernet1
current outbound spi: 0x9DC2A6F6(2646779638)
PFS (Y/N): N, DH group: none
inbound esp sas:
spi: 0x18569EF7(408329975)
transform: esp-aes esp-sha-hmac ,
in use settings ={Tunnel, }
conn id: 2104, flow_id: CSR:104, sibling_flags FFFFFFFF80000049, crypto map: Tunnel1-head-0
sa timing: remaining key lifetime (k/sec): (4608000/1193)
IV size: 16 bytes
replay detection support: Y
Status: ACTIVE(ACTIVE)
inbound ah sas:
inbound pcp sas:
outbound esp sas:
spi: 0x9DC2A6F6(2646779638)
transform: esp-aes esp-sha-hmac ,
in use settings ={Tunnel, }
conn id: 2103, flow_id: CSR:103, sibling_flags FFFFFFFF80000049, crypto map: Tunnel1-head-0
sa timing: remaining key lifetime (k/sec): (4608000/1193)
IV size: 16 bytes
replay detection support: Y
Status: ACTIVE(ACTIVE)
outbound ah sas:
outbound pcp sas:
On Router 2
R2#show crypto ikev2 sa
IPv4 Crypto IKEv2 SA
IPv6 Crypto IKEv2 SA
Tunnel-id fvrf/ivrf Status
1 none/none READY
Local 2001:DB8:2::2/500
Remote 2001:DB8:1::1/500
Encr: AES-CBC, keysize: 256, PRF: SHA256, Hash: SHA256, DH Grp:14, Auth sign: PSK, Auth verify: PSK
Life/Active Time: 86400/19 sec
R2#show cryto ipsec sa
interface: Tunnel1
Crypto map tag: Tunnel1-head-0, local addr 2001:DB8:2::2
protected vrf: (none)
local ident (addr/mask/prot/port): (::/0/0/0)
remote ident (addr/mask/prot/port): (::/0/0/0)
current_peer 2001:DB8:1::1 port 500
PERMIT, flags={origin_is_acl,}
#pkts encaps: 14, #pkts encrypt: 14, #pkts digest: 14
#pkts decaps: 14, #pkts decrypt: 14, #pkts verify: 14
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. failed: 0
#pkts not decompressed: 0, #pkts decompress failed: 0
#send errors 0, #recv errors 0
local crypto endpt.: 2001:DB8:2::2,
remote crypto endpt.: 2001:DB8:1::1
plaintext mtu 1422, path mtu 1500, ipv6 mtu 1500, ipv6 mtu idb GigabitEthernet1
current outbound spi: 0xEF1D3BA2(4011670434)
PFS (Y/N): N, DH group: none
inbound esp sas:
spi: 0x9829B86D(2552871021)
transform: esp-aes esp-sha-hmac ,
in use settings ={Tunnel, }
conn id: 2006, flow_id: CSR:6, sibling_flags FFFFFFFF80000049, crypto map: Tunnel1-head-0
sa timing: remaining key lifetime (k/sec): (4608000/3556)
IV size: 16 bytes
replay detection support: Y
Status: ACTIVE(ACTIVE)
inbound ah sas:
inbound pcp sas:
outbound esp sas:
spi: 0xEF1D3BA2(4011670434)
transform: esp-aes esp-sha-hmac ,
in use settings ={Tunnel, }
conn id: 2005, flow_id: CSR:5, sibling_flags FFFFFFFF80000049, crypto map: Tunnel1-head-0
sa timing: remaining key lifetime (k/sec): (4607998/3556)
IV size: 16 bytes
replay detection support: Y
Status: ACTIVE(ACTIVE)
outbound ah sas:
outbound pcp sas:
Troubleshoot
Para resolver problemas del túnel, utilice estos comandos debug:
debug crypto ikev2
debug crypto ikev2 error
debug crypto ipsec
debug crypto ipsec error