Configuración de la Delegación de Prefijos en el Escenario VPDN
Contenido
Introducción
Este documento describe el ejemplo de configuración de delegación de prefijos en escenarios donde el Servidor de red de protocolo de túnel de capa 2 (LNS) delega un prefijo IPv6 al router cliente sobre el túnel de red de marcado privado virtual (VPDN) construido entre el concentrador de acceso de protocolo de túnel de capa 2 (LAC) y LNS.
Prerequisites
Requirements
Cisco recomienda que conozca la conectividad de capa 1 integral que es UP
Componentes Utilizados
Este documento no tiene restricciones específicas en cuanto a versiones de software y de hardware.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Configurar
Diagrama de la red
En este documento, se utiliza esta configuración de red:
Configuraciones
Configuración del Cliente:
Aquí se muestra un ejemplo de la configuración en el router del cliente:
ipv6 unicast-routing ! interface Ethernet0/0
no ip address
pppoe enable group global
pppoe-client dial-pool-number 1
end
interface Dialer1
ip address negotiated
encapsulation ppp
dialer pool 1
ipv6 address FE80::1234 link-local
ipv6 address autoconfig
ipv6 enable
no ipv6 nd ra suppress
ipv6 dhcp client pd my-prefix1
no keepalive
ppp chap hostname test@cisco.com
ppp chap password 0 cisco
no cdp enable
end ! interface FastEthernet0/2 description - This interface is connected to the LAN segment
no ip address
ipv6 address my-prefix1 ::1/64
ipv6 enable
Configuración de LAC:
Aquí se muestra un ejemplo de la configuración en el LAC:
hostname LAC ! vpdn enable ! vpdn-group 1
request-dialin
protocol l2tp
domain cisco.com
initiate-to ip 192.168.1.2
source-ip 192.168.1.1
no l2tp tunnel authentication
! bba-group pppoe global virtual-template 1 ! interface Ethernet0/0 no ip address pppoe enable group global ! interface Ethernet1/0 ip address 192.168.1.1 255.255.255.0 ! interface Virtual-Template1 no ip address ppp authentication chap !
Configuración de LNS:
Aquí se muestra un ejemplo de la configuración en el LNS:
ipv6 unicast-routing
! vpdn enable ! vpdn-group 1 accept-dialin protocol l2tp virtual-template 1 terminate-from hostname LAC vpn vrf test lcp renegotiation on-mismatch no l2tp tunnel authentication ! username test@cisco.com password cisco interface Ethernet1/0
ip vrf forwarding test
ip address 192.168.1.2 255.255.255.0
negotiation auto
cdp enable
end interface Virtual-Template1 ip address 10.1.1.1 255.255.255.0 ipv6 enable
ipv6 dhcp server AAA
peer default ip address pool local
peer default ipv6 pool PPPOE_POOL6
no keepalive
ppp authentication chap ! ipv6 dhcp pool AAA
prefix-delegation pool DHCPv6Pool ! ipv6 local pool PPPOE_POOL6 2001:DB8:5AB:10::/60 64 ! ip local pool local 10.1.1.2 10.1.1.100 ! ipv6 local pool DHCPv6Pool 2A02:838F:F880::/42 56 !
Verificación
Client#show ipv6 interface brief FastEthernet0/2
FastEthernet0/2 [up/up]
FE80::205:FF:FE77:2C1B
2A02:838F:F880::1 Client#show ipv6 interface brief dialer1
Dialer1 [up/up]
FE80::1234
2001:DB8:5AB:10::1234
Solución de problemas en el cliente
Estas depuraciones ayudan a depurar el problema:
debug ppp negotiation debug ipv6 dhcp detail
Client#show debug
PPP:
PPP protocol negotiation debugging is on
IPv6 DHCP:
IPv6 DHCP debugging is on (detailed)
Este es un fragmento de debug ipv6 dhcp detail en el router del cliente después de que la negociación PPP se haya completado y el respectivo acceso virtual esté ACTIVO.
*Jun 27 15:08:53.019: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, changed state to up
*Jun 27 15:09:03.711: IPv6 DHCP: detailed packet contents
*Jun 27 15:09:03.711: src FE80::1234
*Jun 27 15:09:03.711: dst FF02::1:2 (Dialer1)
*Jun 27 15:09:03.711: type REQUEST(3), xid 1849347
*Jun 27 15:09:03.711: option ELAPSED-TIME(8), len 2
*Jun 27 15:09:03.711: elapsed-time 3202
*Jun 27 15:09:03.711: option CLIENTID(1), len 10
*Jun 27 15:09:03.711: 00030001000500772C1B
*Jun 27 15:09:03.711: option ORO(6), len 6
*Jun 27 15:09:03.711: IA-PD,DNS-SERVERS,DOMAIN-LIST
*Jun 27 15:09:03.711: option SERVERID(2), len 10
*Jun 27 15:09:03.711: 000300017CAD74F9EB00
*Jun 27 15:09:03.711: option IA-PD(25), len 41
*Jun 27 15:09:03.711: IAID 0x000B0001, T1 0, T2 0
*Jun 27 15:09:03.711: option IAPREFIX(26), len 25
*Jun 27 15:09:03.711: preferred 0, valid 0, prefix 2A02:838F:F880::/56
*Jun 27 15:09:03.711: IPv6 DHCP: Sending REQUEST to FF02::1:2 on Dialer1
*Jun 27 15:09:03.711: IPv6 DHCP: Received REPLY from FE80::7EAD:74FF:FEF9:EB00 on Dialer1
*Jun 27 15:09:03.711: IPv6 DHCP: detailed packet contents
*Jun 27 15:09:03.711: src FE80::7EAD:74FF:FEF9:EB00 (Dialer1)
*Jun 27 15:09:03.711: dst FE80::1234 (Dialer1)
*Jun 27 15:09:03.711: type REPLY(7), xid 1849347
*Jun 27 15:09:03.711: option SERVERID(2), len 10
*Jun 27 15:09:03.711: 000300017CAD74F9EB00
*Jun 27 15:09:03.711: option CLIENTID(1), len 10
*Jun 27 15:09:03.711: 00030001000500772C1B
*Jun 27 15:09:03.711: option IA-PD(25), len 41
*Jun 27 15:09:03.711: IAID 0x000B0001, T1 302400, T2 483840
*Jun 27 15:09:03.711: option IAPREFIX(26), len 25
*Jun 27 15:09:03.711: preferred 604800, valid 2592000, prefix 2A02:838F:F880::/56
*Jun 27 15:09:03.711: IPv6 DHCP: Processing options
*Jun 27 15:09:03.711: IPv6 DHCP: Adding prefix 2A02:838F:F880::/56 to my-prefix1
*Jun 27 15:09:03.711: IPv6 DHCP: T1 set to expire in 302400 seconds
*Jun 27 15:09:03.711: IPv6 DHCP: T2 set to expire in 483840 seconds
*Jun 27 15:09:03.711: IPv6 DHCP: DHCPv6 changes state from REQUEST to OPEN (REPLY_RECEIVED) on Dialer1
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