Dit document biedt een voorbeeldconfiguratie voor Layer 2 Tunneling Protocol, versie 3 (L2TPv3), statische en haarspelmethoden.
In deze tabel wordt de wijzigingsondersteuning voor Cisco IOS®-softwarerelease voor L2TPv3 beschreven:
Cisco IOS-softwarerelease | L2TPv3 ondersteuningsbeschrijving |
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12.0(21)S | Initiële ondersteuning van datacenters voor L2TPv3 is geïntroduceerd op Cisco 7200 Series, Cisco 7500 Series, Cisco 10720 en Cisco 12000 Series platforms. |
12.0(23)S | Ondersteuning van L2TPv3-besturingsplane werd geïntroduceerd op Cisco 7200 Series, Cisco 7500 Series, Cisco 10720 en Cisco 12000 Series platforms. |
12.3(2)T | Deze optie is geïntegreerd in Cisco IOS-softwarerelease 12.3(2)T. |
U moet Cisco Express Forwarding (CEF) inschakelen om de L2TPv3-functie te gebruiken. De Xconnect-configuratie-submodus is geblokkeerd totdat CEF is ingeschakeld. Op gedistribueerde platforms, zoals de Cisco 7500-serie, als CEF uitgeschakeld is terwijl een sessie wordt ingesteld, wordt de sessie afgebroken en blijft laag totdat CEF opnieuw wordt ingeschakeld. Gebruik de ip cef of ip cef gedistribueerde opdracht om CEF mogelijk te maken.
Het specificeren van een Bron IP-adres om een loopback-interface te configureren wordt ten zeerste aanbevolen. Als u geen loopback interface vormt, selecteert de router het best beschikbare lokale adres, dat elk IP-adres kan zijn dat op een kerngerichte interface is ingesteld. Deze configuratie kan de instelling van een controlekanaal verhinderen. Het achteruitrijadres moet bereikbaar zijn vanaf de kernnetwerken.
Zorg er voor dat u voordat u deze configuratie probeert, kennis hebt van:
Dit document is niet beperkt tot specifieke software- en hardware-versies.
Raadpleeg voor meer informatie over documentconventies de technische Tips van Cisco.
Deze sectie bevat informatie over het configureren van de functies die in dit document worden beschreven.
N.B.: Als u aanvullende informatie wilt vinden over de opdrachten in dit document, gebruikt u het Opdrachtplanningprogramma (alleen geregistreerd klanten).
Het netwerk in dit document is als volgt opgebouwd:
Opmerking: De routers R2 en R3 worden gebruikt door de leverancier. De routers R1, R4, R5 en R6 zijn eindklanten. Door L2TPv3 te gebruiken, lijkt router R4 een directe verbinding met R5 te hebben; dit geldt ook voor de verbinding tussen router R1 en router R6.
Dit document gebruikt deze configuraties:
Statische pseudo-draad door een IP-wolk. Een relevant deel van de configuratie kan worden gevonden in R2 en R3, waar twee eenrichtingstunnels zijn geconfigureerd.
Hairpin pseudo-draad of lokale omschakeling (van één haven naar een andere haven in de zelfde router). De configuratie wordt alleen op R2 uitgevoerd en bestaat uit het configureren van twee eenrichtingstunnels die op twee loopbacks wijzen, die beide op router R2 zijn.
R2 |
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R2# show running-config Building configuration... service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R2 ! ! clock timezone EST 10 ip subnet-zero ip cef no ip domain-lookup l2tp-class R2signal hello 10 password 0 cisco cookie size 8 ! pseudowire-class wireR5R4 encapsulation l2tpv3 protocol l2tpv3 R2signal ip local interface Loopback0 ip dfbit set ! pseudowire-class wireR6R1 encapsulation l2tpv3 protocol l2tpv3 R2signal ip local interface Loopback1 ip dfbit set ! pseudowire-class wireR1R6 encapsulation l2tpv3 protocol l2tpv3 R2signal ip local interface Loopback2 ip dfbit set ! interface Loopback0 description Used by wireR5R4 for Static Connection ip address 2.2.2.2 255.255.255.255 no ip directed-broadcast ! interface Loopback1 description Used by wireR6R1 for Hair Pinning Connection ip address 2.2.2.6 255.255.255.255 no ip directed-broadcast ! interface Loopback2 description Used by wireR1R6 for Hair Pinning Connection ip address 2.2.2.1 255.255.255.255 no ip directed-broadcast ! interface Ethernet0/0 description Connection to R1 no ip address no ip directed-broadcast xconnect 2.2.2.6 16 encapsulation l2tpv3 pw-class wireR1R6 ! interface Ethernet1/0 description Connection to Pretend Cloud. ip address 20.20.20.2 255.255.255.0 no ip directed-broadcast no cdp enable ! interface Ethernet2/0 description Connection to R5 no ip address no ip directed-broadcast no cdp enable xconnect 3.3.3.3 12 encapsulation l2tpv3 pw-class wireR5R4 ! interface Ethernet3/0 description Connection to R6 no ip address no ip directed-broadcast xconnect 2.2.2.1 16 encapsulation l2tpv3 pw-class wireR6R1 ! ip classless ip route 3.3.3.3 255.255.255.255 20.20.20.3 !--- The other end of wireR5R4 loopback (3.3.3.3) must be !--- reachable from this router. Hair Pinning loopbacks !--- are reachable—there is no need for additional routes. ! ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! end |
R3 |
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R3# show running-config Building configuration... version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R3 ! ! clock timezone EST 10 ip subnet-zero ip cef ! l2tp-class R3signal hello 10 password 0 cisco cookie size 8 ! pseudowire-class wireR4R5 encapsulation l2tpv3 protocol l2tpv3 R3signal ip local interface Loopback0 ip dfbit set ! interface Loopback0 description Use by wireR4R5 for static connection ip address 3.3.3.3 255.255.255.255 no ip directed-broadcast ! interface Ethernet0/0 ip address 20.20.20.3 255.255.255.0 no ip directed-broadcast ! interface Ethernet1/0 no ip address no ip directed-broadcast no cdp enable xconnect 2.2.2.2 12 encapsulation l2tpv3 pw-class wireR4R5 ! ip classless ip route 2.2.2.2 255.255.255.255 Ethernet0/0 !--- The other end of wireR4R5 loopback (3.3.3.3) must be !--- reachable from this router. ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! end |
Eindrouterconfiguratie van de klant R1R6-tunnel (pseudo-draad):
R1 |
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R1# show running-config Building configuration... version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R1 ! ! clock timezone EST 10 ip subnet-zero no ip domain-lookup ! interface Ethernet0/0 ip address 10.10.10.1 255.255.255.0 no ip directed-broadcast ! ip classless ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! end |
R6 |
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R6# show running-config Building configuration... version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R6 ! ! clock timezone EST 10 ip subnet-zero no ip domain-lookup ! interface Ethernet0/0 ip address 10.10.10.6 255.255.255.0 no ip directed-broadcast ! ip classless ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! end |
Eindrouterconfiguratie van de klant R4R5-tunnel (pseudo-draad):
R4 |
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R4# show running-config Building configuration... version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R4 ! ! ip subnet-zero ! interface Ethernet0/0 ip address 30.30.30.4 255.255.255.0 no ip directed-broadcast ! router ospf 1 log-adjacency-changes network 30.30.30.0 0.0.0.255 area 0 ! ip classless ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! end |
R5 |
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R5# show running-config Building configuration... version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R5 ! ! ip subnet-zero ! interface Ethernet0/0 ip address 30.30.30.5 255.255.255.0 no ip directed-broadcast ! router ospf 1 log-adjacency-changes network 30.30.30.0 0.0.0.255 area 0 ! ip classless ! line con 0 exec-timeout 0 0 privilege level 15 line aux 0 line vty 0 4 login ! end |
Deze sectie verschaft informatie die u kunt gebruiken om te bevestigen dat uw configuratie correct werkt.
R4# show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 30.30.30.5 1 FULL/DR 00:00:39 30.30.30.5 Ethernet0/0 R5# show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 30.30.30.4 1 FULL/BDR 00:00:38 30.30.30.4 Ethernet0/0 R1# show cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater Device ID Local Intrfce Holdtme Capability Platform Port ID R6 Eth 0/0 158 R 7206VXR Eth 0/0
Bepaalde opdrachten met show worden ondersteund door de tool Output Interpreter (alleen voor geregistreerde klanten). Hiermee kunt u een analyse van de output van opdrachten met show genereren.
Toon l2tun-tunnel all-Om de huidige status van een L2TPv3-sessie weer te geven en informatie weer te geven over momenteel ingestelde sessies, inclusief lokale en externe L2TP-hostnamen, geaggregeerde pakkettellingen en L2TP-controlekanalen, gebruik de show l2tun-tunnel onder alle opdracht in EXEC-modus.
R2# show l2tun tunnel all Tunnel Information Total tunnels 3 sessions 3 Tunnel id 54217 is up, remote id is 44186, 1 active sessions Tunnel state is established, time since change 00:12:07 Tunnel transport is IP (115) Remote tunnel name is R2 Internet Address 2.2.2.6, port 0 Local tunnel name is R2 Internet Address 2.2.2.1, port 0 Tunnel domain is VPDN group for tunnel is - L2TP class for tunnel is R2signal 88 packets sent, 87 received 10086 bytes sent, 11092 received Control Ns 76, Nr 74 Local RWS 1024 (default), Remote RWS 1024 (max) Tunnel PMTU checking disabled Retransmission time 1, max 1 seconds Unsent queuesize 0, max 0 Resend queuesize 0, max 2 Total resends 0, ZLB ACKs sent 72 Current nosession queue check 0 of 5 Retransmit time distribution: 0 0 0 0 0 0 0 0 0 Sessions disconnected due to lack of resources 0 Tunnel id 44186 is up, remote id is 54217, 1 active sessions Tunnel state is established, time since change 00:12:08 Tunnel transport is IP (115) Remote tunnel name is R2 Internet Address 2.2.2.1, port 0 Local tunnel name is R2 Internet Address 2.2.2.6, port 0 Tunnel domain is VPDN group for tunnel is - L2TP class for tunnel is R2signal 87 packets sent, 88 received 11092 bytes sent, 10086 received Control Ns 74, Nr 76 Local RWS 1024 (default), Remote RWS 1024 (max) Tunnel PMTU checking disabled Retransmission time 1, max 1 seconds Unsent queuesize 0, max 0 Resend queuesize 0, max 1 Total resends 0, ZLB ACKs sent 74 Current nosession queue check 0 of 5 Retransmit time distribution: 0 0 0 0 0 0 0 0 0 Sessions disconnected due to lack of resources 0 Tunnel id 24124 is up, remote id is 48735, 1 active sessions Tunnel state is established, time since change 00:11:00 Tunnel transport is IP (115) Remote tunnel name is R3 Internet Address 3.3.3.3, port 0 Local tunnel name is R2 Internet Address 2.2.2.2, port 0 Tunnel domain is VPDN group for tunnel is - L2TP class for tunnel is R2signal 155 packets sent, 158 received 15230 bytes sent, 17586 received Control Ns 69, Nr 67 Local RWS 1024 (default), Remote RWS 1024 (max) Tunnel PMTU checking disabled Retransmission time 1, max 1 seconds Unsent queuesize 0, max 0 Resend queuesize 0, max 2 Total resends 1, ZLB ACKs sent 65 Current nosession queue check 0 of 5 Retransmit time distribution: 0 0 1 0 0 0 0 0 0 Sessions disconnected due to lack of resources 0 R3# show l2tun tunnel all Tunnel Information Total tunnels 1 sessions 1 Tunnel id 48735 is up, remote id is 24124, 1 active sessions Tunnel state is established, time since change 00:12:36 Tunnel transport is IP (115) Remote tunnel name is R2 Internet Address 2.2.2.2, port 0 Local tunnel name is R3 Internet Address 3.3.3.3, port 0 Tunnel domain is VPDN group for tunnel is - L2TP class for tunnel is R3signal 180 packets sent, 176 received 19766 bytes sent, 17316 received Control Ns 77, Nr 79 Local RWS 1024 (default), Remote RWS 1024 (max) Tunnel PMTU checking disabled Retransmission time 1, max 1 seconds Unsent queuesize 0, max 0 Resend queuesize 0, max 1 Total resends 1, ZLB ACKs sent 78 Current nosession queue check 0 of 5 Retransmit time distribution: 0 0 1 0 0 0 0 0 0 Sessions disconnected due to lack of resources 0
Toon alle-n sessie tonen-Om de huidige staat van een Layer 2 sessie te tonen en protocol informatie over een L2TPv3 controlekanaal te tonen, gebruik de show l2tun sessie alle opdracht in EXEC modus.
R2# show l2tun session all Session Information Total tunnels 3 sessions 3 Session id 19996 is up, tunnel id 54217 Call serial number is 1492400000 Remote tunnel name is R2 Internet address is 2.2.2.6 Session is L2TP signalled Session state is established, time since change 00:15:37 112 Packets sent, 111 received 12309 Bytes sent, 13312 received Receive packets dropped: out-of-order: 0 total: 0 Send packets dropped: exceeded session MTU: 0 total: 0 Session vcid is 16 Session Layer 2 circuit, type is Ethernet, name is Ethernet0/0 Circuit state is UP Remote session id is 19999, remote tunnel id 44186 DF bit on, ToS reflect disabled, ToS value 0, TTL value 255 Session cookie information: local cookie, size 8 bytes, value 6E 47 8C 4A BA BF 7E A4 remote cookie, size 8 bytes, value 7F 9F 65 C4 C7 5B 57 FF FS cached header information: encap size = 32 bytes 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Sequencing is off Session id 19999 is up, tunnel id 44186 Call serial number is 1492400000 Remote tunnel name is R2 Internet address is 2.2.2.1 Session is L2TP signalled Session state is established, time since change 00:15:38 111 Packets sent, 112 received 13312 Bytes sent, 12309 received Receive packets dropped: out-of-order: 0 total: 0 Send packets dropped: exceeded session MTU: 0 total: 0 Session vcid is 16 Session Layer 2 circuit, type is Ethernet, name is Ethernet3/0 Circuit state is UP Remote session id is 19996, remote tunnel id 54217 DF bit on, ToS reflect disabled, ToS value 0, TTL value 255 Session cookie information: local cookie, size 8 bytes, value 7F 9F 65 C4 C7 5B 57 FF remote cookie, size 8 bytes, value 6E 47 8C 4A BA BF 7E A4 FS cached header information: encap size = 32 bytes 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Sequencing is off Session id 20005 is up, tunnel id 24124 Call serial number is 1492400002 Remote tunnel name is R3 Internet address is 3.3.3.3 Session is L2TP signalled Session state is established, time since change 00:14:29 200 Packets sent, 204 received 19650 Bytes sent, 22100 received Receive packets dropped: out-of-order: 0 total: 0 Send packets dropped: exceeded session MTU: 0 total: 0 Session vcid is 12 Session Layer 2 circuit, type is Ethernet, name is Ethernet2/0 Circuit state is UP Remote session id is 17834, remote tunnel id 48735 DF bit on, ToS reflect disabled, ToS value 0, TTL value 255 Session cookie information: local cookie, size 8 bytes, value 22 09 F1 E9 BC 8C 00 94 remote cookie, size 8 bytes, value 39 DD CB 00 9C 4B 1C 8C FS cached header information: encap size = 32 bytes 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Sequencing is off R3# show l2tun session all Session Information Total tunnels 1 sessions 1 Session id 17834 is up, tunnel id 48735 Call serial number is 1492400002 Remote tunnel name is R2 Internet address is 2.2.2.2 Session is L2TP signalled Session state is established, time since change 00:23:53 327 Packets sent, 322 received 33758 Bytes sent, 31248 received Receive packets dropped: out-of-order: 0 total: 0 Send packets dropped: exceeded session MTU: 0 total: 0 Session vcid is 12 Session Layer 2 circuit, type is Ethernet, name is Ethernet1/0 Circuit state is UP Remote session id is 20005, remote tunnel id 24124 DF bit on, ToS reflect disabled, ToS value 0, TTL value 255 Session cookie information: local cookie, size 8 bytes, value 39 DD CB 00 9C 4B 1C 8C remote cookie, size 8 bytes, value 22 09 F1 E9 BC 8C 00 94 FS cached header information: encap size = 32 bytes 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Sequencing is off
Deze sectie bevat informatie waarmee u problemen met de configuratie kunt oplossen.
U kunt Bug Tool-kit gebruiken (alleen geregistreerde klanten) voor meer informatie over deze L2TPv3-functiekaarten:
CSCdz01467 (alleen geregistreerde klanten) — Opgelost (R) L2TPv3: Tunnel pakketteller, toont onnauwkeurige telling.
CSCeb56061 (alleen geregistreerde klanten) — Opgelost (R) L2TPv3: L2TPv3oETH genereert zombietunnels.
CSCeb35497 (alleen geregistreerde klanten) — Opgeloste (R) L2TPv3 sequencing: Het Tx Seqnum is niet na 1677215 oud.
CSCdz48481 (alleen geregistreerde klanten) — Opgeloste (R) L2TPv3-haarspelconfiguratie wordt niet langer ondersteund.
CSCec00463 (alleen geregistreerde klanten) — Opgelost (R) L2TPv3: FOUT bij Gig Ethernet-poortmodus
CSCec4356 (alleen geregistreerde klanten) — Opgelost (R) C10720: Overeenkomend met 802.1P in L2TPv3 is kapotgemaakt.
Revisie | Publicatiedatum | Opmerkingen |
---|---|---|
1.0 |
10-Aug-2005 |
Eerste vrijgave |