Configurazione di una sessione PPPoE da un computer Windows a un router Cisco

Introduzione

In questo documento viene descritta la procedura per configurare una connessione point-to-point su Ethernet (PPPoE) tra un computer Windows (che funziona come client PPPoE) e un router Cisco che funziona come server PPPoE.

Prerequisiti

Requisiti

Cisco raccomanda la conoscenza del livello 1 end-to-end di connettività come priorità utente (UP).

Componenti usati

Il documento può essere consultato per tutte le versioni software o hardware.

Le informazioni discusse in questo documento fanno riferimento a dispositivi usati in uno specifico ambiente di emulazione. Su tutti i dispositivi menzionati nel documento la configurazione è stata ripristinata ai valori predefiniti. Se la rete è operativa, valutare attentamente eventuali conseguenze derivanti dall'uso dei comandi.

Configurazione

Esempio di rete

Nel documento viene usata l'impostazione di rete mostrata nell'immagine:

Configurazioni

Configurazione BRAS

aaa new-model

! Enabling AAA on router

!

aaa authentication ppp PPPOE-METD group PPPOE-RADIUS

! Defining AAA method list for PPP Authentication

aaa authorization network PPPOE-AUTHOR-METD group PPPOE-RADIUS

! Defining AAA method list for PPP Authorization

aaa accounting network PPPOE-ACCT-METD start-stop group PPPOE-RADIUS

! Defining AAA method list for PPP Accounting

!

aaa group server radius PPPOE-RADIUS

! Defining AAA Server Group named PPPOE-RADIUS
server-private 10.106.39.253 key cisco
ip radius source-interface GigabitEthernet0/0/0

!

bba-group pppoe BBA-TEST
virtual-template 10

!

interface GigabitEthernet0/0/1.47
encapsulation dot1Q 1 native
pppoe enable group BBA-TEST
end

!

interface Virtual-Template10
ip unnumbered Loopback10
peer default ip address pool local

! Calling three named AAA Method lists configured above under this Virtual Template
ppp authentication pap chap PPPOE-METD
ppp authorization PPPOE-AUTHOR-METD
ppp accounting PPPOE-ACCT-METD
end

!

ip local pool local 192.168.1.2 192.168.1.10

!

interface Loopback10
ip address 192.168.1.1 255.255.255.255
end

!

Configurazioni e impostazioni del computer Windows

Completare la procedura seguente per avviare una sessione PPPoE da un computer Windows che funge da client PPPoE.

Passaggio 1. Aprire Centro connessioni di rete e condivisione e fare clic su Configura una nuova connessione o rete come mostrato nell'immagine.

Passaggio 2. Come mostrato nell'immagine, selezionare Connetti a Internet e fare clic su Avanti.

Passaggio 3. Selezionare Configura comunque una nuova connessione, come mostrato nell'immagine:

Passaggio 4. Selezionare No, quindi creare una nuova connessione, come mostrato nell'immagine:

Passaggio 5. Come mostrato nell'immagine, fare clic su Broadband (PPPoE):

Passaggio 6. Come mostrato nell'immagine, immettere il nome utente, la password e il nome della connessione, quindi fare clic su Connessione.

In questo modo viene avviata una sessione PPPoE verso il server. Controllare la sezione di verifica come mostrato nell'immagine:

Verifica

Passaggio 1. Aprire nuovamente la scheda Reti, selezionare la rete (in questo esempio denominata PPPOE-USER) e verificare lo stato. Fare clic su Connect (Connetti) per avviare una sessione dopo aver immesso il nome utente e la password, come mostrato nell'immagine:

Passaggio 2. Aprire il prompt dei comandi ed eseguire il comando ipconfig /all per controllare l'indirizzo IP negoziato, come mostrato nell'immagine:

Passaggio 3. Abilitare debug pppoe event, debug pppoe error e debug ppp negotiation per controllare la creazione della sessione PPPoE. È inoltre possibile abilitare debug radius per visualizzare i messaggi scambiati con il server Radius.

BRAS#show debugging

 

PPP:
PPP protocol negotiation debugging is on
PPPoE:
PPPoE protocol events debugging is on
PPPoE protocol errors debugging is on

 

Radius protocol debugging is on
Radius packet protocol debugging is on

 

Debug snippet:


BRAS#
*Sep 19 18:44:14.531: PPPoE 0: I PADI R:0050.56ad.7206 L:ffff.ffff.ffff Gi0/0/1.47

 

! Receiving PPPoE Active Discovery Initiation (PADI) broadcast packet from Windows Machine (MAC 0050.56ad.7206) on Router interface Gi0/0/1.47


*Sep 19 18:44:14.531: Service tag: NULL Tag
*Sep 19 18:44:14.531: PPPoE 0: O PADO, R:d867.d99f.6601 L:0050.56ad.7206 Gi0/0/1.47

 

! Sending PPPoE Active Discovery Offer (PADO) unicast packet from  Router interface Gi0/0/1.47 (MAC d867.d99f.6601 ) to Windows Machine (MAC 0050.56ad.7206)


*Sep 19 18:44:14.531: Service tag: NULL Tag
*Sep 19 18:44:14.533: PPPoE 0: I PADR R:0050.56ad.7206 L:d867.d99f.6601 Gi0/0/1.47

 

! Receiving PPPoE Active Discovery Request (PADR) unicast packet from Windows Machine (MAC 0050.56ad.7206) on Router interface Gi0/0/1.47


*Sep 19 18:44:14.533: Service tag: NULL Tag
*Sep 19 18:44:14.533: PPPoE : encap string prepared
*Sep 19 18:44:14.533: [76]PPPoE 63: Access IE handle allocated
*Sep 19 18:44:14.533: [76]PPPoE 63: AAA get retrieved attrs
*Sep 19 18:44:14.533: [76]PPPoE 63: AAA get nas port details
*Sep 19 18:44:14.533: [76]PPPoE 63: Error adjusting nas port format did
*Sep 19 18:44:14.533: [76]PPPoE 63: AAA get dynamic attrs
*Sep 19 18:44:14.533: [76]PPPoE 63: AAA unique ID 88 allocated
*Sep 19 18:44:14.533: [76]PPPoE 63: No AAA accounting method list
*Sep 19 18:44:14.534: [76]PPPoE 63: Service request sent to SSS
*Sep 19 18:44:14.534: [76]PPPoE 63: Created, Service: None R:d867.d99f.6601 L:0050.56ad.7206 Gi0/0/1.47
*Sep 19 18:44:14.534: [76]PPPoE 63: State NAS_PORT_POLICY_INQUIRY Event SSS MORE KEYS
*Sep 19 18:44:14.534: PPP: Alloc Context [7FE79EC0D8C8]
*Sep 19 18:44:14.534: ppp76 PPP: Phase is ESTABLISHING
*Sep 19 18:44:14.534: [76]PPPoE 63: data path set to PPP
*Sep 19 18:44:14.534: [76]PPPoE 63: Segment (SSS class): PROVISION

 

! We can also enable 'debug sss events' and 'debug sss error' to debug this stage


*Sep 19 18:44:14.534: [76]PPPoE 63: State PROVISION_PPP Event SSM PROVISIONED
*Sep 19 18:44:14.534: [76]PPPoE 63: O PADS R:0050.56ad.7206 L:d867.d99f.6601 Gi0/0/1.47

 

! Sending PPPoE Active Discovery Session Confirmation  (PADS) unicast packets from  Router interface Gi0/0/1.47 (MAC d867.d99f.6601 ) to Windows Machine (MAC 0050.56ad.7206)


*Sep 19 18:44:14.534: [76]PPPoE 63: Unable to Add ANCP Line attributes to the PPPoE Authen attributes

 

! Access Node Control Protocol (ANCP) is configured between the Digital Subscriber Line Access Concentrator (DSLAM) and Broadband Remote Access Server (BRAS), which is used to aggregate traffic from multiple subscribers and deliver information for any application independently. More information related to ANCP could be found here. It is expected for the IOS to print this message even if ANCP is not enabled.

 

*Sep 19 18:44:14.534: ppp76 PPP: Using vpn set call direction
*Sep 19 18:44:14.534: ppp76 PPP: Treating connection as a callin
*Sep 19 18:44:14.534: ppp76 PPP: Session handle[8800004C] Session id[76]
*Sep 19 18:44:14.534: ppp76 LCP: Event[OPEN] State[Initial to Starting]
*Sep 19 18:44:14.534: ppp76 PPP LCP: Enter passive mode, state[Stopped]
*Sep 19 18:44:14.539: ppp76 LCP: I CONFREQ [Stopped] id 0 len 21
*Sep 19 18:44:14.539: ppp76 LCP: MRU 1480 (0x010405C8)
*Sep 19 18:44:14.539: ppp76 LCP: MagicNumber 0x61EB5A46 (0x050661EB5A46)
*Sep 19 18:44:14.539: ppp76 LCP: PFC (0x0702)
*Sep 19 18:44:14.539: ppp76 LCP: ACFC (0x0802)
*Sep 19 18:44:14.539: ppp76 LCP: Callback 6 (0x0D0306)
*Sep 19 18:44:14.539: ppp76 LCP: O CONFREQ [Stopped] id 1 len 18
*Sep 19 18:44:14.539: ppp76 LCP: MRU 1492 (0x010405D4)
*Sep 19 18:44:14.539: ppp76 LCP: AuthProto PAP (0x0304C023)
*Sep 19 18:44:14.539: ppp76 LCP: MagicNumber 0x7B063BEA (0x05067B063BEA)
*Sep 19 18:44:14.539: ppp76 LCP: O CONFREJ [Stopped] id 0 len 7
*Sep 19 18:44:14.539: ppp76 LCP: Callback 6 (0x0D0306)
*Sep 19 18:44:14.539: ppp76 LCP: Event[Receive ConfReq-] State[Stopped to REQsent]
*Sep 19 18:44:14.540: ppp76 LCP: I CONFACK [REQsent] id 1 len 18
*Sep 19 18:44:14.540: ppp76 LCP: MRU 1492 (0x010405D4)
*Sep 19 18:44:14.540: ppp76 LCP: AuthProto PAP (0x0304C023)
*Sep 19 18:44:14.540: ppp76 LCP: MagicNumber 0x7B063BEA (0x05067B063BEA)
*Sep 19 18:44:14.540: ppp76 LCP: Event[Receive ConfAck] State[REQsent to ACKrcvd]
*Sep 19 18:44:14.540: ppp76 LCP: I CONFREQ [ACKrcvd] id 1 len 18
*Sep 19 18:44:14.540: ppp76 LCP: MRU 1480 (0x010405C8)
*Sep 19 18:44:14.540: ppp76 LCP: MagicNumber 0x61EB5A46 (0x050661EB5A46)
*Sep 19 18:44:14.540: ppp76 LCP: PFC (0x0702)
*Sep 19 18:44:14.540: ppp76 LCP: ACFC (0x0802)
*Sep 19 18:44:14.540: ppp76 LCP: O CONFACK [ACKrcvd] id 1 len 18
*Sep 19 18:44:14.540: ppp76 LCP: MRU 1480 (0x010405C8)
*Sep 19 18:44:14.540: ppp76 LCP: MagicNumber 0x61EB5A46 (0x050661EB5A46)
*Sep 19 18:44:14.540: ppp76 LCP: PFC (0x0702)
*Sep 19 18:44:14.540: ppp76 LCP: ACFC (0x0802)
*Sep 19 18:44:14.540: ppp76 LCP: Event[Receive ConfReq+] State[ACKrcvd to Open]
*Sep 19 18:44:14.541: ppp76 LCP: I IDENTIFY [Open] id 2 len 18 magic 0x61EB5A46MSRASV5.20
*Sep 19 18:44:14.541: ppp76 LCP: I IDENTIFY [Open] id 3 len 24 magic 0x61EB5A46MSRAS-0-ADMIN-PC
*Sep 19 18:44:14.541: ppp76 LCP: I IDENTIFY [Open] id 4 len 24 magic 0x61EB5A46sPPY.X`I?Z5SWE}}
*Sep 19 18:44:14.541: ppp76 PPP: Queue PAP code[1] id[78]
*Sep 19 18:44:14.563: ppp76 PPP: Phase is AUTHENTICATING, by this end
*Sep 19 18:44:14.564: ppp76 PAP: Redirect packet to ppp76
*Sep 19 18:44:14.564: ppp76 PAP: I AUTH-REQ id 78 len 11 from "cisco"

 

! Incoming Authentication Request from Windows Machine using User name "cisco"


*Sep 19 18:44:14.564: ppp76 PAP: Authenticating peer cisco
*Sep 19 18:44:14.564: ppp76 PPP: Phase is FORWARDING, Attempting Forward
*Sep 19 18:44:14.564: ppp76 LCP: State is Open
*Sep 19 18:44:14.564: ppp76 PPP: Phase is AUTHENTICATING, Unauthenticated User
*Sep 19 18:44:14.564: RADIUS/ENCODE(00000088):Orig. component type = PPPoE
*Sep 19 18:44:14.564: RADIUS: DSL line rate attributes successfully added
*Sep 19 18:44:14.564: RADIUS/ENCODE: Skip encoding 0 length AAA Cisco vsa password
*Sep 19 18:44:14.564: RADIUS(00000088): Config NAS IP: 10.106.39.212
*Sep 19 18:44:14.564: RADIUS(00000088): Config NAS IPv6: ::
*Sep 19 18:44:14.564: RADIUS/ENCODE: No idb found! Framed IP Addr might not be included
*Sep 19 18:44:14.564: RADIUS/ENCODE(00000088): acct_session_id: 125
*Sep 19 18:44:14.564: RADIUS(00000088): Config NAS IP: 10.106.39.212
*Sep 19 18:44:14.564: RADIUS(00000088): sending
*Sep 19 18:44:14.564: RADIUS(00000088): Send Access-Request to 10.106.39.253:1645 id 1645/106, len 147

 

! Sending an Access-Request to Radius Server at 10.106.39.253 on port 1645.


*Sep 19 18:44:14.564: RADIUS: authenticator C1 5B AA 62 1D E1 31 6C - 16 A5 CE 92 D6 9C 12 E7
*Sep 19 18:44:14.564: RADIUS: Framed-Protocol [7] 6 PPP [1]
*Sep 19 18:44:14.564: RADIUS: User-Name [1] 7 "cisco"
*Sep 19 18:44:14.564: RADIUS: User-Password [2] 18 *
*Sep 19 18:44:14.564: RADIUS: NAS-Port-Type [61] 6 Virtual [5]
*Sep 19 18:44:14.564: RADIUS: NAS-Port [5] 6 0
*Sep 19 18:44:14.564: RADIUS: NAS-Port-Id [87] 9 "0/0/1/1"
*Sep 19 18:44:14.564: RADIUS: Vendor, Cisco [26] 41
*Sep 19 18:44:14.564: RADIUS: Cisco AVpair [1] 35 "client-mac-address=0050.56ad.7206"
*Sep 19 18:44:14.564: RADIUS: Service-Type [6] 6 Framed [2]
*Sep 19 18:44:14.564: RADIUS: NAS-IP-Address [4] 6 10.106.39.212
*Sep 19 18:44:14.564: RADIUS: Acct-Session-Id [44] 10 "0000007D"
*Sep 19 18:44:14.564: RADIUS: Nas-Identifier [32] 12 "BRAS"
*Sep 19 18:44:14.564: RADIUS(00000088): Sending a IPv4 Radius Packet
*Sep 19 18:44:14.564: RADIUS(00000088): Started 5 sec timeout
*Sep 19 18:44:14.566: RADIUS: Received from id 1645/106 10.106.39.253:1645, Access-Accept, len 52

 

! Receiving an Access-Accep from Radius Server


*Sep 19 18:44:14.566: RADIUS: authenticator C0 0D 6C 33 F1 A3 04 27 - F0 C2 76 F5 54 FD E2 42
*Sep 19 18:44:14.566: RADIUS: Class [25] 32
*Sep 19 18:44:14.566: RADIUS: 4A 83 05 60 00 00 01 37 00 01 0A 6A 27 FD 01 D2 12 2E 98 D0 4F B0 00 00 00 00 00 00 00 14 [ J`7j'.O]
*Sep 19 18:44:14.566: RADIUS(00000088): Received from id 1645/106
*Sep 19 18:44:14.566: ppp76 PPP: Phase is FORWARDING, Attempting Forward
*Sep 19 18:44:14.568: [76]PPPoE 63: State LCP_NEGOTIATION Event SSS CONNECT LOCAL
*Sep 19 18:44:14.568: [76]PPPoE 63: Segment (SSS class): UPDATED
*Sep 19 18:44:14.568: [76]PPPoE 63: Segment (SSS class): BOUND
*Sep 19 18:44:14.568: [76]PPPoE 63: data path set to Virtual Acess
*Sep 19 18:44:14.569: [76]PPPoE 63: State LCP_NEGOTIATION Event SSM UPDATED
*Sep 19 18:44:14.569: Vi2.1 PPP: Phase is AUTHENTICATING, Authenticated User
*Sep 19 18:44:14.569: Vi2.1 PAP: O AUTH-ACK id 78 len 5
*Sep 19 18:44:14.569: Vi2.1 PPP: Reducing MTU to peer's MRU
*Sep 19 18:44:14.569: [76]PPPoE 63: AAA get dynamic attrs
*Sep 19 18:44:14.569: Vi2.1 PPP: Phase is UP
*Sep 19 18:44:14.569: Vi2.1 IPCP: Protocol configured, start CP. state[Initial]
*Sep 19 18:44:14.569: Vi2.1 IPCP: Event[OPEN] State[Initial to Starting]
*Sep 19 18:44:14.569: Vi2.1 IPCP: O CONFREQ [Starting] id 1 len 10
*Sep 19 18:44:14.569: Vi2.1 IPCP: Address 192.168.1.1 (0x0306C0A80101)
*Sep 19 18:44:14.569: Vi2.1 IPCP: Event[UP] State[Starting to REQsent]
*Sep 19 18:44:14.569: [76]PPPoE 63: State PTA_BINDING Event STATIC BIND RESPONSE
*Sep 19 18:44:14.569: [76]PPPoE 63: Connected PTA
<snip>
*Sep 19 18:44:14.572: Vi2.1 IPCP: Event[Receive ConfReq+] State[ACKrcvd to Open]
*Sep 19 18:44:14.595: Vi2.1 IPCP: State is Open
*Sep 19 18:44:14.595: PPPoE : ipfib_encapstr prepared
*Sep 19 18:44:14.596: Vi2.1 Added to neighbor route AVL tree: topoid 0, address 192.168.1.2
*Sep 19 18:44:14.596: Vi2.1 IPCP: Install route to 192.168.1.2

! Installing route to PPPoE client

BRAS#sh caller ip
Line User IP Address Local Number Remote Number <->
Vi2.1 cisco 192.168.1.2 - - in
BRAS# ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

Risoluzione dei problemi

Al momento non sono disponibili informazioni specifiche per la risoluzione dei problemi di questa configurazione. Tuttavia, è possibile applicare tecniche standard di risoluzione dei problemi relative a PPP e PPPoE con l'ausilio dei relativi debug.

Informazioni correlate

• Documentazione e supporto tecnico – Cisco Systems