[RTA] l2tp enable
[RTA]l2tp-group 1
[RTA-l2tp1] tunnel password simple aabbcc
[RTA-l2tp1] tunnel name LAC
[RTA-l2tp1] start l2tp ip 2.2.2.1 domain abc.com
在RTB上进行配置。首先启动L2TP功能:
[RTB]l2tp enable
然后配置abc.com域,并配置IP地址池。此域用于提供对L2TP VPN用户进行身份验证的参数,此地址池用于对L2TP VPN客户端分配IP地址:
[RTB]domain abc.com
[RTB-isp-abc.com]authentication ppp local
[RTB-isp-abc.com]ip pool 1 192.168.1.2 192.168.1.100
随后添加一个本地用户,并配置其密码和服务类型,用于对L2TP VPN用户进行身份验证:
[RTB-isp-abc.com]local-user vpdnuser
[RTB-luser-vpdnuser]password simple Hello
[RTB-luser-vpdnuser]service-type ppp
接着配置L2TP组,指定其接受来自abc.com域且名为LAC的对端设备发起的控制连接,并配置了相应的隧道本端名称、隧道验证密码等:
[RTB-luser-vpdnuser]l2tp-group 1
[RTB-l2tp1]allow l2tp virtual-template 1 remote LAC domain abc.com
[RTB-l2tp1]tunnel password simple aabbcc
[RTB-l2tp1]tunnel name LNS
最后还需要配置一个虚模版接口,以便对拨入的L2TP VPN用户进行身份验证,为其分配地址并与其进行IP通信:
[RTB-l2tp1]interface Virtual-Template1
[RTB-Virtual-Template1]ppp authentication-mode chap domain abc.com
[RTB-Virtual-Template1]remote address pool 1
[RTB-Virtual-Template1]ip address 192.168.1.1 255.255.255.0
在PCA上创建PPPoE连接。在Windows XP中,在任务栏上单击【开始】->【所有程序】->【附件】->【通讯】->【新建连接向导】,打开如图2-2所示的【新建连接向导】窗口。
单击【下一步】,进入图2-3所示的窗口。选择【连接到Internet】。
单击【下一步】,进入图2-4所示的窗口,选择【手动设置我的连接】。
单击【下一步】,进入图2-5所示的窗口,选择【用要求用户名和密码的宽带连接来连接】。
单击【下一步】,进入图2-6所示的窗口,在【ISP名称】文本框中输入连接名称,例如“我的PPPoE连接”。
单击【下一步】,指定可使用此连接的用户,再单击【下一步】进入图2-7所示的窗口。在【用户名】处输入用户名vpdnuser@abc.com,在【密码】和【确认密码】处输入密码Hello。如有必要,清除【把它作为默认的Internet连接】复选框。
单击【下一步】,再单击【完成】,即可完成连接设置。
图2-6 设置Internet账户信息
在任务栏单击【开始】->【设置】->【控制面板】,打开【网络连接】窗口,可以看到刚刚配置的“我的PPPoE连接”,双击之,进入图2-8所示的窗口,单击【连接】按钮即可发起连接。拨号成功后在【网络连接】窗口中可以看到此连接的状态为“已连接上”。
从PCA上ping PCB,检测连通性。应该可以连通。
在RTA和RTB上用display命令查看相关信息,可见RTA与RTB之间建立了一个L2TP隧道,其中有一个L2TP会话:
[RTA]display l2tp tunnel
Total tunnel = 1
LocalTID RemoteTID RemoteAddress Port Sessions RemoteName
1 1 2.2.2.1 1701 1 LNS
[RTA]display l2tp session
Total session = 1
LocalSID RemoteSID LocalTID
11984 3303 1
<RTB>display l2tp tunnel
Total tunnel = 1
LocalTID RemoteTID RemoteAddress Port Sessions RemoteName
1 1 1.1.1.1 1701 1 LAC
<RTB>display l2tp session
Total session = 1
LocalSID RemoteSID LocalTID
3303 11984 1
用reset命令终止隧道:
<RTB>reset l2tp tunnel name LAC
Clear L2TP tunnel remote name = LAC
用display命令查看相关信息,发现隧道和会话都消失。
在RTA和RTB上打开debugging开关。
<RTA>debugging l2tp event
<RTA>debugging l2tp control
<RTB>debugging l2tp event
<RTB>debugging l2tp control
重新发起呼叫,通过debugging信息观察隧道建立的过程:
<RTA>
%Jun 29 16:10:23:450 2009 RTA IFNET/4/UPDOWN:
Line protocol on the interface Virtual-Template0:0 is UP
*Jun 29 16:10:23:453 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: LAC is establishing a call on interface: Virtual-Template0:0
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Handle call UP, IfIndex =3145728
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: LNS address in RADIUS = 2.2.2.1
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: VPDN group number in RADIUS = 1
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: LNS address = 2.2.2.1
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Add new call 11564 to tunnel 1 call list (total 1)
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Get UDP port number successfully: port 1701
*Jun 29 16:10:23:454 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: START_CONTROL_CONNECTION_REQUEST
*Jun 29 16:10:23:598 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Protocol version: 100
*Jun 29 16:10:23:699 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Host name: LAC
*Jun 29 16:10:23:799 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Vendor name: H3C
*Jun 29 16:10:23:910 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Framing capability :3
*Jun 29 16:10:24:11 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Assigned Tunnel ID: 1
*Jun 29 16:10:24:61 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Receive window size: 128
*Jun 29 16:10:24:212 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Challenge :59 1A BB 52 70 E2 15 CD 82 C2 CC 3F 49 2F AB D4
*Jun 29 16:10:24:313 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 started the Hello timer (60 seconds)
*Jun 29 16:10:24:414 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 sent a SCCRQ message
*Jun 29 16:10:24:515 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv ctrl message and restarted Hello timer
*Jun 29 16:10:24:615 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Received message type: 2
*Jun 29 16:10:24:666 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Board 0 recv from SOCK call ID=0 tunnel ID=1 MsgType = 2 Length = 117
*Jun 29 16:10:24:767 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Proc a control message from the peer: type=2, len = 117
*Jun 29 16:10:24:878 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv SCCRP when in state 2
*Jun 29 16:10:24:978 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 started the Hello timer (60 seconds)
*Jun 29 16:10:25:79 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Checked SCCRP MSG TYPE = 2
*Jun 29 16:10:25:230 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Protocol version, value: 100
*Jun 29 16:10:25:281 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Framing capability, value: 3
*Jun 29 16:10:25:432 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Host name, value: LNS
*Jun 29 16:10:25:532 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Remote tunnel ID: 1
*Jun 29 16:10:25:633 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Bearer capability, value: 3
*Jun 29 16:10:25:784 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Receive window size: 128
*Jun 29 16:10:25:885 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Challenge, Value: 81 14 35 54 9E DC AA 1D 55 3F 1D CA 6D 7F 51 AE
*Jun 29 16:10:25:996 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Challenge response: 9F 97 EC A2 E6 84 68 56 77 FD EC 56 74 9A 6B 5D
*Jun 29 16:10:26:46 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: START_CONTROL_CONNECTION_CONNECTED
*Jun 29 16:10:26:147 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Challenge response:1D B5 3C B0 3C 23 C7 16 BC 70 76 22 2F F2 D3 2F
*Jun 29 16:10:26:248 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 sent SCCCN to tunnel 1
*Jun 29 16:10:26:349 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1: waiting for calls
*Jun 29 16:10:26:449 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: INCOMING_CALL_REQUEST
*Jun 29 16:10:26:550 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Assigned call ID: 11564
*Jun 29 16:10:26:651 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Call serial number: 11564
*Jun 29 16:10:26:802 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Bearer type : 3
*Jun 29 16:10:26:953 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Physical channel number: 0
*Jun 29 16:10:27:64 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Dialed number: 8888
*Jun 29 16:10:27:215 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Call 11564 sent a ICRQ message
*Jun 29 16:10:27:316 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv ctrl message and restarted Hello timer
*Jun 29 16:10:27:417 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Received message type: 11
*Jun 29 16:10:27:517 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Board 0 recv from SOCK call ID=11564 tunnel ID=1 MsgType = 11 Length = 28
*Jun 29 16:10:27:618 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Proc a control message from the peer: type=11, len = 28
*Jun 29 16:10:27:719 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Call 11564 recv ICRP in state 4 from Call 0
*Jun 29 16:10:27:769 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 restarted the Hello timer (60 seconds)
*Jun 29 16:10:27:870 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Checked ICRP MSG TYPE = 11
*Jun 29 16:10:27:971 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP remote call ID: 13787
*Jun 29 16:10:28:82 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: INCOMING_CALL_CONNECTED
*Jun 29 16:10:28:182 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Tx connect speed: 0
*Jun 29 16:10:28:283 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Framing type : 3
*Jun 29 16:10:28:434 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Initial received LCP options
*Jun 29 16:10:28:535 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Last sent LCP options
*Jun 29 16:10:28:636 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Last received LCP options
*Jun 29 16:10:28:737 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication type : 2
*Jun 29 16:10:28:837 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication name : vpdnuser@abc.com
*Jun 29 16:10:28:938 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication challenge
*Jun 29 16:10:29:39 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication ID : 1
*Jun 29 16:10:29:150 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Proxy authenticate response:95 01 9b 56 4e 1b 7b 26 2a ee 75 3a 34 24 d7 a9
*Jun 29 16:10:29:251 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy private group number : 0
*Jun 29 16:10:29:351 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Rx connect speed: 0
*Jun 29 16:10:29:452 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Call 11564 sent a ICCN message to remote Call 13787
*Jun 29 16:10:29:503 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv ctrl message and restarted Hello timer
*Jun 29 16:10:29:603 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Received message type: 16
*Jun 29 16:10:29:754 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Board 0 recv from SOCK call ID=11564 tunnel ID=1 MsgType = 16 Length = 36
*Jun 29 16:10:29:855 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Proc a control message from the peer: type=16, len = 36
*Jun 29 16:10:29:956 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:30:107 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:30:218 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:30:319 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:30:420 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:30:520 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:30:621 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
*Jun 29 16:10:33:528 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
<RTA>
<RTA>
*Jun 29 16:10:43:604 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
<RTA>
*Jun 29 16:10:53:681 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
断开连接,观察debugging信息:
<RTA>
*Jun 29 16:10:56:752 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0
%Jun 29 16:10:56:781 2009 RTA IFNET/4/UPDOWN:
Line protocol on the interface Virtual-Template0:0 is DOWN
*Jun 29 16:10:56:782 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: CALL 11564 DOWN on interface: Virtual-Template0:0
*Jun 29 16:10:56:783 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc l2tp down msg, call in the state 9
*Jun 29 16:10:56:783 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: CALL_DISCONNECT_NOTIFY
*Jun 29 16:10:56:784 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Result code: LOSS_OF_CARRIER
*Jun 29 16:10:56:784 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Assigned call ID: 11564
*Jun 29 16:10:56:784 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Call 11564 sent a CDN message
*Jun 29 16:10:56:784 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Cleared the data structure of call 11564
*Jun 29 16:10:56:881 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc call ID = 11564 Down
*Jun 29 16:10:56:982 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Disabled L2TP successfully on interface 3145728
*Jun 29 16:10:57:82 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv ctrl message and restarted Hello timer
*Jun 29 16:10:57:183 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Received message type: 39856
*Jun 29 16:10:57:294 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Board 0 recv from SOCK call ID=0 tunnel ID=1 Length = 12
*Jun 29 16:10:57:395 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Proc peer control len = 12
<RTA>
<RTA>
*Jun 29 16:11:23:524 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Hello timer of tunnel 1 expired in 60 seconds
*Jun 29 16:11:23:524 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 sent StopCCN to Tunnel 1
*Jun 29 16:11:23:525 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: STOP_CONTROL_CONNECTION_NOTIFICATION
*Jun 29 16:11:23:525 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Assigned Tunnel ID: 1
*Jun 29 16:11:23:525 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Result code: LOSS_OF_CARRIER
*Jun 29 16:11:23:525 2009 RTA L2TP/7/L2TDBG: L2TP_EVENT: Cleared Tunnel remote ID:1, local ID:1
*Jun 29 16:11:23:770 2009 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Received ctrl message is ZLB, discard it
<RTA>
这样就可以了解呼叫中L2TP的主要信息交换过程。限于篇幅,此处不列出RTB的debugging输出信息,请自行观察。
删除所有静态路由。在RTA上删除所有PPPoE和L2TP配置。
[RTA-GigabitEthernet0/0]undo pppoe-server bind
All PPPoE Sessions on GigabitEthernet0/0 will be deleted, continue?[Y/N]:y
[RTA]undo domain abc.com
[RTA]undo l2tp enable
[RTA]undo l2tp-group 1
[RTA]undo interface Virtual-Template 0
[RTA]undo local-user vpdnuser
[RTA]undo domain abc.com
在RTA、RTB和SWA上配置OSPF:
[RTA]ospf
[RTA-ospf-1]area 0
[RTA-ospf-1-area-0.0.0.0]network 1.0.0.0 0.255.255.255
[RTA-ospf-1-area-0.0.0.0]network 3.0.0.0 0.255.255.255
[SWA]ospf
[SWA-ospf-1]area 0
[SWA-ospf-1-area-0.0.0.0]network 1.0.0.0 0.255.255.255
[SWA-ospf-1-area-0.0.0.0]network 2.0.0.0 0.255.255.255
[RTB]ospf
[RTB-ospf-1]area 0
[RTB-ospf-1-area-0.0.0.0]network 2.0.0.0 0.255.255.255
在PCA上安装iNode客户端。启动安装程序,跟随安装向导完成安装即可。
注意:
要使iNode客户端支持L2TP功能,在安装过程中必须确认安装虚拟网卡(Virtual NIC)。
启动iNode客户端程序,在其主界面窗口中单击菜单【文件】|【新建连接】,启动新建连接向导,如图2-9所示。
单击【下一步】,进入图2-10所示窗口,单击选定【L2TP IPSec VPN协议】。
单击【下一步】,进入图2-11所示窗口,单击选定【普通连接】。
单击【下一步】,进入图2-12所示窗口,在【连接名】处输入一个连接名称,例如“我的VPN连接”,在【登录用户名】处输入用户名,在【登录密码】处输入密码。
单击【下一步】,进入图2-13所示窗口,输入LNS服务器地址。
单击【高级】进入图2-14所示的窗口,进入【L2TP设置】选项卡,输入隧道名称LAC,选择认证模式为CHAP,单击选定【使用隧道验证密码】并输入隧道验证密码aabbcc。单击【确定】回到图2-13所示窗口。
图2-12 VPN连接基本设置
图2-13 VPN连接高级属性
单击【下一步】进入图2-15所示的窗口,单击【创建】,即可创建新建连接。
在RTB上保留上一实验任务中的LNS配置即可。为方便起见,此处列出相关的配置作为参考:
[RTB]l2tp enable
[RTB]domain abc.com
[RTB-isp-abc.com]authentication ppp local
[RTB-isp-abc.com]ip pool 1 192.168.1.2 192.168.1.100
[RTB-isp-abc.com]local-user vpdnuser
[RTB-luser-vpdnuser]password simple Hello
[RTB-luser-vpdnuser]service-type ppp
[RTB-luser-vpdnuser]l2tp-group 1
[RTB-l2tp1]allow l2tp virtual-template 1 remote LAC domain abc.com
[RTB-l2tp1]tunnel password simple aabbcc
[RTB-l2tp1]tunnel name LNS
[RTB-l2tp1]interface Virtual-Template1
[RTB-Virtual-Template1]ppp authentication-mode chap domain abc.com
[RTB-Virtual-Template1]remote address pool 1
在PCA上用查看连接,可见除了物理的以太网连接之外,还出现了一个新的连接,其地址处于192.168.1.0/24网段,是从RTB的接口Virtual-template 1上动态获得的。
C:\Documents and Settings\User>ipconfig
Windows IP Configuration
Ethernet adapter {7E6CC322-8F6E-490A-AD0D-A86FBDF2D2B6}:
Ethernet adapter 本地连接 3:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.1.3
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 192.168.1.3
Ethernet adapter 本地连接:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 3.3.3.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 3.3.3.1
在RTB上用display命令查看L2TP隧道和会话信息,可见隧道已建立,其中包含一个会话:
<RTB>display l2tp tunnel
Total tunnel = 1
LocalTID RemoteTID RemoteAddress Port Sessions RemoteName
1 1 3.3.3.2 1082 1 LAC
<RTB>display l2tp session
Total session = 1
LocalSID RemoteSID LocalTID
30512 41 1