r1(config-if)#do wr t
Building configuration...

Current configuration : 5266 bytes
hostname r1

ip cef

pseudowire-class test
encapsulation l2tpv3
ip local interface Loopback0

interface Loopback0
ip address 10.1.0.1 255.255.255.0
!
interface Ethernet0/0
no ip address
xconnect 30.1.0.3 1 pw-class test
!
interface Serial0/0
no ip address
encapsulation frame-relay
no dce-terminal-timing-enable
no frame-relay inverse-arp
!
interface Serial0/0.12 point-to-point
ip address 12.1.1.1 255.255.255.0
frame-relay interface-dlci 102

router ospf 1
network 10.1.0.0 0.0.0.255 area 10
network 12.1.1.0 0.0.0.255 area 10
==============================================

hostname r2

interface Serial0/0
no ip address
encapsulation frame-relay
!
interface Serial0/0.21 point-to-point
ip address 12.1.1.2 255.255.255.0
frame-relay interface-dlci 201
!
interface Serial0/0.23 point-to-point
ip address 23.1.1.2 255.255.255.0
frame-relay interface-dlci 203

router ospf 1
network 12.1.1.0 0.0.0.255 area 10
network 23.1.1.0 0.0.0.255 area 10

================================================
hostname r3

ip cef

pseudowire-class test
encapsulation l2tpv3
ip local interface Loopback0

interface Loopback0
ip address 30.1.0.3 255.255.255.0
!
interface Ethernet0/0
no ip address
xconnect 10.1.0.1 1 pw-class test
!
interface Serial0/0
no ip address
encapsulation frame-relay
no dce-terminal-timing-enable
no frame-relay inverse-arp
!
interface Serial0/0.23 point-to-point
ip address 23.1.1.3 255.255.255.0
frame-relay interface-dlci 302

router ospf 1
network 30.1.0.0 0.0.0.255 area 10
network 23.1.1.0 0.0.0.255 area 10
============================================
hostname r4

interface FastEthernet0/0
ip address 45.1.1.4 255.255.255.0
============================================
hostname r5

interface FastEthernet0/0
ip address 45.1.1.5 255.255.255.0
=============================================
host sw1

interface FastEthernet0/1
switchport access vlan 14 <===============R1
!
interface FastEthernet0/2
!
interface FastEthernet0/3
switchport access vlan 35<----------------R3
!
interface FastEthernet0/4 <================R4
switchport access vlan 14
!
interface FastEthernet0/5
switchport access vlan 35<----------------R5
=============================================
r1#ping 30.1.0.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 30.1.0.3, timeout is 2 seconds:
!
!!!!
SUCcess rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms

r1#sh l2tun tunnel all

%No active L2F tunnels

L2TP Tunnel Information Total tunnels 1 sessions 1

Tunnel id 3331 is up, remote id is 60973, 1 active sessions
Tunnel state is established, time since change 00:21:18
Tunnel transport is IP (115)
Remote tunnel name is r3
Internet Address 30.1.0.3, port 0
Local tunnel name is r1
Internet Address 10.1.0.1, port 0
Tunnel domain unknown
VPDN group for tunnel is not available
L2TP class for tunnel is l2tp_default_class
668 packets sent, 50 received
47449 bytes sent, 10708 received
Last clearing of "show vpdn" counters never
Control Ns 29, Nr 25
Local RWS 800 (default), Remote RWS 800 (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 21
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

%No active PPTP tunnels
================================================== =========
r3(config-if)#do ping 10.1.0.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms
r3(config-if)#do sh l2tun tunnel all

%No active L2F tunnels

L2TP Tunnel Information Total tunnels 1 sessions 1

Tunnel id 60973 is up, remote id is 3331, 1 active sessions
Tunnel state is established, time since change 00:23:27
Tunnel transport is IP (115)
Remote tunnel name is r1
Internet Address 10.1.0.1, port 0
Local tunnel name is r3
Internet Address 30.1.0.3, port 0
Tunnel domain unknown
VPDN group for tunnel is not available
L2TP class for tunnel is l2tp_default_class
52 packets sent, 735 received
11506 bytes sent, 52164 received
Last clearing of "show vpdn" counters never
Control Ns 27, Nr 31
Local RWS 800 (default), Remote RWS 800 (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 29
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

%No active PPTP tunnels
================================================== =========
r4#ping 45.1.1.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 45.1.1.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/12 ms
================================================== =========

（出處：http://www.vipcn.com）