配置L2TP多跳以執行從NAS到LNS的多跳

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已更新: 2007 年 11 月 19 日
文件 ID:9497

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簡介

多跳虛擬專用撥接網路(VPDN)允許您在從L2TP存取集中器(LAC)到L2TP網路伺服器(LNS)的路上設定多個躍點。最多支援四跳。通道會在每個躍點(LNS)中終止，並重新發起到下一躍點目的地。此程式允許通道交換。可以在ISP之間使用多跳來提供批次訪問虛擬專用網路(VPN)服務。

此案例同時支援第2層轉送(L2F)和第2層通道通訊協定(L2TP)。然而，由於L2TP正在成為行業標準，因此本文重點討論L2TP。

必要條件

慣例

如需文件慣例的詳細資訊，請參閱思科技術提示慣例。

需求

本文件沒有特定先決條件。

有關VPDN進程的說明，請參閱瞭解VPDN。

採用元件

本檔案中的資訊是根據以下軟體和硬體版本。

  • Cisco IOS®軟體版本12.3(6)

  • L2TP訪問集中器(LAC):思科AS5400接入伺服器

  • L2TP網路伺服器(LNS):思科7200路由器

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您在即時網路中工作，請確保在使用任何命令之前瞭解其潛在影響。

設定

本節提供用於設定本文件中所述功能的資訊。

注意：要查詢有關本文檔中使用的命令的其他資訊，請使用命令查詢工具(僅限註冊客戶)。

網路圖表

本文檔使用下圖所示的網路設定。

l2tp_multihop2a.gif

在此設定中：

  • 使用者端使用ISDN撥入LAC（例如，可以使用DSL代替）。

  • LAC使用E1主速率介面(PRI)來接受呼叫。

  • L2TP裝置之間沒有隧道已開啟。

  • 隧道和會話設定基於域名。沒有用於身份驗證或授權的AAA伺服器。

  • 它使用兩個LNS。

具體過程如下：

  1. 客戶端撥入LAC。客戶端和LAC協商LCP選項。執行身份驗證階段，LAC獲取使用者名稱(user@cisco.com)和密碼。根據域名(在我們的示例中為cisco.com)，它會開啟一個隧道，然後是到LNS1的會話。

  2. 在LAC和LNS1之間開啟L2TP會話後，LNS1將獲得LAC和客戶端之間協商的LCP選項以及使用者名稱和密碼(user@cisco.com，密碼)。

  3. LNS1的VPDN組在其配置中具有相同的域(cisco.com)。它會開啟到LNS2的隧道和會話。如果它沒有此類配置，則會通過驗證客戶端、協商IP地址並安裝路由來終止PPP會話。

  4. 在LNS1和LNS2之間開啟L2TP會話後，LNS2將獲得LAC和客戶端之間協商的LCP選項以及使用者和密碼(user@cisco.com，密碼)。 它驗證使用者、協商IPCP並安裝路由。

組態

本文檔使用如下所示的配置。此處使用的命令最小數。例如，LAC不會終止任何會話，因此無需在Dialer1或Group-async1介面中配置IP地址。LNS1不會終止任何PPP會話，因此virtual-template1下沒有IP地址。

LAC 
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname LAC
!
boot-start-marker
no boot startup-test
boot-end-marker
!
enable password 7 02050D480809
!
!
!
resource-pool disable
spe default-firmware spe-firmware-2
no aaa new-model
ip subnet-zero
no ip domain lookup
!         
ip cef

! -- Enables VPDN.

vpdn enable

! -- VPDN tunnel authorization is based first on the domain name ! -- (the default is DNIS).

! vpdn search-order domain  
!

! -- The LAC opens an L2TP tunnel and session to 10.48.74.113 (LNS1) ! -- using the password LACLNS1 for users whose domain-name is cisco.com.

vpdn-group 1
 request-dialin
  protocol l2tp
  domain cisco.com
 initiate-to ip 10.48.74.113 
 l2tp tunnel password LACLNS1
!
isdn switch-type primary-net5
!
!
no voice hpi capture buffer
no voice hpi capture destination 
!
!
controller E1 7/0
 pri-group timeslots 1-31
!
interface FastEthernet0/0
 ip address 10.48.74.128 255.255.255.0
 duplex auto
 speed auto
!
interface Serial7/0:15
 no ip address
 encapsulation ppp
 dialer rotary-group 1
 isdn switch-type primary-net5
!
interface Group-Async1
 no ip address
 encapsulation ppp
 async mode interactive
 ppp authentication chap callin
 group-range 1/00 3/107
!
interface Dialer1
 no ip address
 encapsulation ppp
 ppp authentication chap callin
!
ip classless
no ip http server
!
!
voice-port 7/0:D
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
line 1/00 1/107
 modem InOut
 transport input all
line 3/00 3/107
 modem InOut
 transport input all
!
scheduler allocate 10000 400
!         
end

LNS1 
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname LNS1
!
boot-start-marker
boot-end-marker
!
enable password cisco
!
clock timezone CET 1
no aaa new-model
ip subnet-zero
ip cef    
!
!
no ip domain lookup
!

! -- Enables VPDN. 

vpdn enable

! -- Enables VPDN multihop.

vpdn multihop
!

!-- LNS1 accepts L2TP tunnel/session from the router named LAC. !-- The password LACLNS1 is used between LAC and LNS1 for authentication. !-- The virtual-template 1 is used for the PPP phase.

vpdn-group FromLAC
 accept-dialin
  protocol l2tp
  virtual-template 1
 terminate-from hostname LAC
 l2tp tunnel password 0 LACLNS1
!

! -- The LNS1 opens a L2TP tunnel and session to 10.11.0.2 (LNS2) ! -- using the password LNS1LNS2 for users whose domain-name is cisco.com. 

vpdn-group TowardsLNS2
 request-dialin
  protocol l2tp
  domain cisco.com
 initiate-to ip 10.11.0.2 
 l2tp tunnel password 0 LNS1LNS2
!
!
interface Ethernet0/0
 ip address 10.48.74.113 255.255.255.0
 no ip proxy-arp
 half-duplex
!
interface Ethernet0/1
 ip address 10.11.0.1 255.255.255.0
 half-duplex
!
interface Virtual-Template1
 no ip address
 ppp authentication chap callin
!
no ip http server
ip classless
!
!
dial-peer cor custom
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 exec-timeout 0 0
 password ww
 login
!
ntp clock-period 17208915
ntp server 10.48.75.134
!
!
end

LNS2 
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname LNS2
!
boot-start-marker
boot-end-marker
!
enable password cisco
!
username user@cisco.com password 0 cisco
no aaa new-model
ip subnet-zero
!
!
ip cef    
!

!-- Enables VPDN.

vpdn enable
!

!-- LNS2 accepts L2TP tunnel/session from the router named LNS1. !-- The password LNS1LNS2 is used between LNS1 and LNS2 for authentication. !-- The virtual-template 1 is used for the PPP phase.

vpdn-group FromLNS1
! Default L2TP VPDN group
 accept-dialin
  protocol l2tp
  virtual-template 1
 l2tp tunnel password 0 LNS1LNS2
!
!
interface Loopback0
 ip address 192.168.1.1 255.255.255.0
!
interface Ethernet3/0
 ip address 10.11.0.2 255.255.255.0
 duplex half
!
interface Virtual-Template1
 ip unnumbered Loopback0
 peer default ip address pool VpdnUsers
 ppp authentication chap callin
!
ip local pool VpdnUsers 192.168.1.2 192.168.1.254
ip classless
no ip http server
!
!
line con 0
 exec-timeout 0 0
 transport preferred all
 transport output all
 stopbits 1
line aux 0
 transport preferred all
 transport output all
 stopbits 1
line vty 0 4
 login
 transport preferred all
 transport input all
 transport output all
!
!
!
end

驗證

本節提供的資訊可用於確認您的組態是否正常運作。

輸出直譯器工具(僅供註冊客戶使用)支援某些show命令，此工具可讓您檢視show命令輸出的分析。

  • show vpdn — 顯示有關活動L2TP或L2F協定隧道和VPDN中消息識別符號的資訊。

  • show caller user user detail — 顯示來電者資訊。

在LAC、LNS1和LNS2上使用這些命令的輸出如下所示：

LAC#show vpdn        

L2TP Tunnel and Session Information Total tunnels 1 sessions 1

LocID RemID Remote Name   State  Remote Address  Port  Sessions VPDN Group
18693 28416 LNS1          est    10.48.74.113    1701  1        1              

LocID RemID TunID Intf          Username             State  Last Chg Uniq ID
19    21    18693 Se7/0:3       user@cisco.com       est    00:02:04 28     

%No active L2F tunnels

%No active PPTP tunnels
LAC#

我們發現LNS1有兩個隧道，每個隧道中有一個會話。

LNS1#show vpdn 

L2TP Tunnel and Session Information Total tunnels 2 sessions 2

LocID RemID Remote Name   State  Remote Address  Port  Sessions VPDN Group
28416 18693 LAC           est    10.48.74.128    1701  1        FromLAC        

LocID RemID TunID Intf          Username             State  Last Chg Uniq ID
21    19    28416 SSS Circuit   user@cisco.com       est    00:02:25 13     

LocID RemID Remote Name   State  Remote Address  Port  Sessions VPDN Group
30255 35837 LNS2          est    10.11.0.2       1701  1        TowardsLNS2    

LocID RemID TunID Intf          Username             State  Last Chg Uniq ID
22    9     30255 SSS Circuit   user@cisco.com       est    00:02:25 13     

%No active L2F tunnels

%No active PPTP tunnels
LNS1#
LNS2#show vpdn

L2TP Tunnel and Session Information Total tunnels 1 sessions 1

LocID RemID Remote Name   State  Remote Address  Port  Sessions VPDN Group
35837 30255 LNS1          est    10.11.0.1       1701  1        FromLNS1       

LocID RemID TunID Intf          Username             State  Last Chg Uniq ID
9     22    35837 Vi2.1         user@cisco.com       est    00:03:22 8      

%No active L2F tunnels

%No active PPTP tunnels
LNS2#

LNS2#show caller user user@cisco.com detail

  User: user@cisco.com, line Vi2.1, service PPPoVPDN
        Connected for 00:03:33, Idle for 00:00:58
  Timeouts:    Limit     Remaining Timer Type
               -         -         -         
  PPP: LCP Open, CHAP (<-), IPCP
  LCP: -> peer, AuthProto, MagicNumber
       <- peer, MagicNumber, EndpointDisc
  NCP: Open IPCP
  IPCP: <- peer, Address
        -> peer, Address
  IP: Local 192.168.1.1, remote 192.168.1.2
  Counts: 56 packets input, 2562 bytes
          57 packets output, 2570 bytes

LNS2#

疑難排解

本節提供的資訊可用於對組態進行疑難排解。

疑難排解指令

輸出直譯器工具(僅供註冊客戶使用)支援某些show命令，此工具可讓您檢視show命令輸出的分析。

注意：發出debug指令之前，請先參閱有關Debug指令的重要資訊。

LAC上的故障排除命令

  • debug isdn q931 — 顯示有關本地路由器（使用者端）與網路之間的ISDN網路連線（第3層）的呼叫建立和拆除的資訊。

  • debug vpdn event — 顯示L2TP錯誤和作為VPDN正常隧道建立或關閉的一部分的事件。

  • debug vpdn error — 對第2層通道通訊協定第3版(L2TPv3)和周圍的第2層通道基礎架構進行疑難排解。

  • debug vpdn l2x-events — 顯示協定特定條件導致的事件。

  • vpdn l2x-errors — 顯示在協定特定條件下發生的錯誤。

  • debug ppp negotiation — 顯示客戶端是否正在傳遞PPP協商。您可以看到正在協商哪些選項（例如，回叫或MLP）和哪些協定（例如IP和IPX）。

LNS1上的故障排除命令

  • debug vpdn event

  • debug vpdn error

  • debug vpdn l2x event

  • vpdn l2x-erro

  • debug ppp negotiation

  • debug vtemplate error — 顯示從虛擬模板克隆虛擬訪問介面到呼叫結束時虛擬訪問介面關閉時的克隆資訊。

  • debug vtemplate event — 顯示從虛擬模板克隆虛擬訪問介面到呼叫結束時虛擬訪問介面關閉時的克隆資訊。

LNS2上的故障排除命令

與LNS1相同，但使用另外一條命令：

  • debug ip peer — 定義池組時，顯示地址活動並包含其他輸出。

調試輸出 — LAC

LAC上的調試輸出如下：

LAC#
*Apr 23 08:55:23.579: ISDN Se7/0:15 Q931: RX <- SETUP pd = 8  callref = 0x256F 
        Sending Complete 
        Bearer Capability i = 0x8890 
                Standard = CCITT 
                Transer Capability = Unrestricted Digital 
                Transfer Mode = Circuit 
                Transfer Rate = 64 kbit/s 
        Channel ID i = 0xA18384 
                Preferred, Channel 4 
        Calling Party Number i = 0xA1, '8101' 
                Plan:ISDN, Type:National 
        Called Party Number i = 0x81, '7070' 
                Plan:ISDN, Type:Unknown 
        Locking Shift to Codeset 6 
        Codeset 6 IE 0x28  i = 'TAC BRI 8101'
*Apr 23 08:55:23.583: ISDN Se7/0:15 Q931: TX -> CALL_PROC pd = 8  callref = 0xA56F 
        Channel ID i = 0xA98384 
                Exclusive, Channel 4
*Apr 23 08:55:23.583: ISDN Se7/0:15 Q931: TX -> CONNECT pd = 8  callref = 0xA56F 
        Channel ID i = 0xA98384 
                Exclusive, Channel 4
*Apr 23 08:55:23.583: Se7/0:3 PPP: Using dialer call direction
*Apr 23 08:55:23.583: Se7/0:3 PPP: Treating connection as a callin
*Apr 23 08:55:23.583: Se7/0:3 PPP: Phase is ESTABLISHING, Passive Open
*Apr 23 08:55:23.583: Se7/0:3 LCP: State is Listen
*Apr 23 08:55:23.607: ISDN Se7/0:15 Q931: RX <- CONNECT_ACK pd = 8  
callref = 0x256F
*Apr 23 08:55:23.695: Se7/0:3 LCP: I CONFREQ [Listen] id 180 len 31
*Apr 23 08:55:23.695: Se7/0:3 LCP:    MagicNumber 0x9028FFED (0x05069028FFED)
*Apr 23 08:55:23.695: Se7/0:3 LCP:    MRRU 1524 (0x110405F4)
*Apr 23 08:55:23.695: Se7/0:3 LCP:    EndpointDisc 1 user@cisco.com
*Apr 23 08:55:23.695: Se7/0:3 LCP:     (0x1311017573657240636973636F2E636F)
*Apr 23 08:55:23.695: Se7/0:3 LCP:     (0x6D)
*Apr 23 08:55:23.695: Se7/0:3 LCP: O CONFREQ [Listen] id 1 len 15
*Apr 23 08:55:23.695: Se7/0:3 LCP:    AuthProto CHAP (0x0305C22305)
*Apr 23 08:55:23.695: Se7/0:3 LCP:    MagicNumber 0x050E44FB (0x0506050E44FB)
*Apr 23 08:55:23.695: Se7/0:3 LCP: O CONFREJ [Listen] id 180 len 8
*Apr 23 08:55:23.695: Se7/0:3 LCP:    MRRU 1524 (0x110405F4)
*Apr 23 08:55:23.727: Se7/0:3 LCP: I CONFACK [REQsent] id 1 len 15
*Apr 23 08:55:23.727: Se7/0:3 LCP:    AuthProto CHAP (0x0305C22305)
*Apr 23 08:55:23.727: Se7/0:3 LCP:    MagicNumber 0x050E44FB (0x0506050E44FB)
*Apr 23 08:55:23.751: Se7/0:3 LCP: I CONFREQ [ACKrcvd] id 181 len 27
*Apr 23 08:55:23.751: Se7/0:3 LCP:    MagicNumber 0x9028FFED (0x05069028FFED)
*Apr 23 08:55:23.751: Se7/0:3 LCP:    EndpointDisc 1 user@cisco.com
*Apr 23 08:55:23.751: Se7/0:3 LCP:     (0x1311017573657240636973636F2E636F)
*Apr 23 08:55:23.751: Se7/0:3 LCP:     (0x6D)
*Apr 23 08:55:23.751: Se7/0:3 LCP: O CONFACK [ACKrcvd] id 181 len 27
*Apr 23 08:55:23.751: Se7/0:3 LCP:    MagicNumber 0x9028FFED (0x05069028FFED)
*Apr 23 08:55:23.751: Se7/0:3 LCP:    EndpointDisc 1 user@cisco.com
*Apr 23 08:55:23.751: Se7/0:3 LCP:     (0x1311017573657240636973636F2E636F)
*Apr 23 08:55:23.751: Se7/0:3 LCP:     (0x6D)
*Apr 23 08:55:23.751: Se7/0:3 LCP: State is Open
*Apr 23 08:55:23.751: Se7/0:3 PPP: Phase is AUTHENTICATING, by this end
*Apr 23 08:55:23.751: Se7/0:3 CHAP: O CHALLENGE id 1 len 24 from "LAC"
*Apr 23 08:55:23.803: Se7/0:3 CHAP: I RESPONSE id 1 len 35 from "user@cisco.com"
*Apr 23 08:55:23.803: Se7/0:3 PPP: Phase is FORWARDING, Attempting Forward
*Apr 23 08:55:23.807:  Tnl/Sn 18693/19 L2TP: Session FS enabled
*Apr 23 08:55:23.807:  Tnl/Sn 18693/19 L2TP: Session state change 
from idle to wait-for-tunnel
*Apr 23 08:55:23.807: Se7/0:3 Tnl/Sn 18693/19 L2TP: Create session
*Apr 23 08:55:23.807:  Tnl 18693 L2TP: SM State idle
*Apr 23 08:55:23.807:  Tnl 18693 L2TP: O SCCRQ 
*Apr 23 08:55:23.807:  Tnl 18693 L2TP: Control channel retransmit delay 
set to 1 seconds
*Apr 23 08:55:23.807:  Tnl 18693 L2TP: Tunnel state change from idle to 
wait-ctl-reply
*Apr 23 08:55:23.807:  Tnl 18693 L2TP: SM State wait-ctl-reply
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: I SCCRP from LNS1
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: Got a challenge from remote peer, LNS1
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: Got a response from remote peer, LNS1
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: Tunnel Authentication success
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: Tunnel state change from 
wait-ctl-reply to established
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: O SCCCN  to LNS1 tnlid 28416
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: Control channel retransmit 
delay set to 1 seconds
*Apr 23 08:55:23.815:  Tnl 18693 L2TP: SM State established
*Apr 23 08:55:23.815: Se7/0:3 Tnl/Sn 18693/19 L2TP: O ICRQ to LNS1 28416/0
*Apr 23 08:55:23.815: Se7/0:3 Tnl/Sn 18693/19 L2TP: Session state change 
from wait-for-tunnel to wai
t-reply
*Apr 23 08:55:23.831: Se7/0:3 Tnl/Sn 18693/19 L2TP: O ICCN to LNS1 28416/21
*Apr 23 08:55:23.831:  Tnl 18693 L2TP: Control channel retransmit delay 
set to 1 seconds
*Apr 23 08:55:23.831: Se7/0:3 Tnl/Sn 18693/19 L2TP: Session state change 
from wait-reply to establis
hed
*Apr 23 08:55:23.831: Se7/0:3 Tnl/Sn 18693/19 L2TP: VPDN session up
*Apr 23 08:55:23.831: Se7/0:3 PPP: Phase is FORWARDED, Session Forwarded
*Apr 23 08:55:23.831: Se7/0:3 PPP: Process pending packets
LAC#

調試輸出 — LNS1

LNS1上的調試輸出如下：

LNS1#
.Apr 23 08:57:08.900: L2TP: I SCCRQ from LAC tnl 18693
.Apr 23 08:57:08.900:  Tnl 28416 L2TP: Got a challenge in SCCRQ, LAC
.Apr 23 08:57:08.900:  Tnl 28416 L2TP: New tunnel created for remote LAC, 
address 10.48.74.128
.Apr 23 08:57:08.904:  Tnl 28416 L2TP: O SCCRP  to LAC tnlid 18693
.Apr 23 08:57:08.904:  Tnl 28416 L2TP: Control channel retransmit delay 
set to 1 seconds
.Apr 23 08:57:08.904:  Tnl 28416 L2TP: Tunnel state change from idle to 
wait-ctl-reply
.Apr 23 08:57:08.908:  Tnl 28416 L2TP: I SCCCN from LAC tnl 18693
.Apr 23 08:57:08.908:  Tnl 28416 L2TP: Got a Challenge Response in 
SCCCN from LAC
.Apr 23 08:57:08.912:  Tnl 28416 L2TP: Tunnel Authentication success
.Apr 23 08:57:08.912:  Tnl 28416 L2TP: Tunnel state change from 
wait-ctl-reply to established
.Apr 23 08:57:08.912:  Tnl 28416 L2TP: SM State established
.Apr 23 08:57:08.912:  Tnl 28416 L2TP: I ICRQ from LAC tnl 18693
.Apr 23 08:57:08.916:  Tnl/Sn 28416/21 L2TP: Session FS enabled
.Apr 23 08:57:08.916:  Tnl/Sn 28416/21 L2TP: Session state change 
from idle to wait-connect
.Apr 23 08:57:08.916:  Tnl/Sn 28416/21 L2TP: New session created
.Apr 23 08:57:08.916:  Tnl/Sn 28416/21 L2TP: O ICRP to LAC 18693/19
.Apr 23 08:57:08.920:  Tnl 28416 L2TP: Control channel retransmit 
delay set to 1 seconds
.Apr 23 08:57:08.924:  Tnl/Sn 28416/21 L2TP: 
I ICCN from LAC tnl 18693, cl 19
.Apr 23 08:57:08.924: user@cisco.com Tnl/Sn 28416/21 L2TP: 
Session state change from wait-connect to wait-for-service-selection
.Apr 23 08:57:08.932: ppp13 PPP: Phase is ESTABLISHING
.Apr 23 08:57:08.932: ppp13 LCP: I FORCED rcvd CONFACK len 11
.Apr 23 08:57:08.932: ppp13 LCP:    AuthProto CHAP (0x0305C22305)
.Apr 23 08:57:08.936: ppp13 LCP:    MagicNumber 0x050E44FB (0x0506050E44FB)
.Apr 23 08:57:08.936: ppp13 LCP: I FORCED sent CONFACK len 23
.Apr 23 08:57:08.936: ppp13 LCP:    MagicNumber 0x9028FFED (0x05069028FFED)
.Apr 23 08:57:08.936: ppp13 LCP:    EndpointDisc 1 user@cisco.com
.Apr 23 08:57:08.936: ppp13 LCP:     (0x1311017573657240636973636F2E636F)
.Apr 23 08:57:08.936: ppp13 LCP:     (0x6D)
.Apr 23 08:57:08.940: ppp13 PPP: Phase is FORWARDING, Attempting Forward
.Apr 23 08:57:08.948:  Tnl/Sn 30255/22 L2TP: Session FS enabled
.Apr 23 08:57:08.952:  Tnl/Sn 30255/22 L2TP: Session state change 
from idle to wait-for-tunnel
.Apr 23 08:57:08.952: uid:13 Tnl/Sn 30255/22 L2TP: Create session
.Apr 23 08:57:08.952:  Tnl 30255 L2TP: SM State idle
.Apr 23 08:57:08.952:  Tnl 30255 L2TP: O SCCRQ 
.Apr 23 08:57:08.956:  Tnl 30255 L2TP: Control channel retransmit 
delay set to 1 seconds
.Apr 23 08:57:08.956:  Tnl 30255 L2TP: Tunnel state change from 
idle to wait-ctl-reply
.Apr 23 08:57:08.956:  Tnl 30255 L2TP: SM State wait-ctl-reply
.Apr 23 08:57:08.960:  Tnl 30255 L2TP: I SCCRP from LNS2
.Apr 23 08:57:08.960:  Tnl 30255 L2TP: Got a challenge from remote peer, LNS2
.Apr 23 08:57:08.964:  Tnl 30255 L2TP: Got a response from remote peer, LNS2
.Apr 23 08:57:08.964:  Tnl 30255 L2TP: Tunnel Authentication success
.Apr 23 08:57:08.964:  Tnl 30255 L2TP: Tunnel state change from 
wait-ctl-reply to established
.Apr 23 08:57:08.964:  Tnl 30255 L2TP: O SCCCN  to LNS2 tnlid 35837
.Apr 23 08:57:08.968:  Tnl 30255 L2TP: Control channel retransmit 
delay set to 1 seconds
.Apr 23 08:57:08.968:  Tnl 30255 L2TP: SM State established
.Apr 23 08:57:08.968: uid:13 Tnl/Sn 30255/22 L2TP: O ICRQ to LNS2 35837/0
.Apr 23 08:57:08.968: uid:13 Tnl/Sn 30255/22 L2TP: Session state 
change from wait-for-tunnel to wait-reply
.Apr 23 08:57:08.972: uid:13 Tnl/Sn 30255/22 L2TP: O ICCN to LNS2 35837/9
.Apr 23 08:57:08.976:  Tnl 30255 L2TP: Control channel retransmit 
delay set to 1 seconds
.Apr 23 08:57:08.976: uid:13 Tnl/Sn 30255/22 L2TP: Session state 
change from wait-reply to established
.Apr 23 08:57:08.976: uid:13 Tnl/Sn 30255/22 L2TP: VPDN session up
.Apr 23 08:57:08.980: ppp13 PPP: Phase is FORWARDED, Session Forwarded
.Apr 23 08:57:08.984: user@cisco.com Tnl/Sn 28416/21 L2TP: 
Session state change from wait-for-service-selection to established
.Apr 23 08:57:08.984: user@cisco.com Tnl/Sn 28416/21 L2TP: VPDN session up
.Apr 23 08:57:08.984: ppp13 PPP: Process pending ncp packets
LNS1#

調試輸出 — LNS2

LNS2上的調試輸出如下：

LNS2#
*Apr 23 08:57:59.615: L2TP: I SCCRQ from LNS1 tnl 30255
*Apr 23 08:57:59.615:  Tnl 35837 L2TP: Got a challenge in SCCRQ, LNS1
*Apr 23 08:57:59.615:  Tnl 35837 L2TP: New tunnel created for remote LNS1, 
address 10.11
.0.1
*Apr 23 08:57:59.615:  Tnl 35837 L2TP: O SCCRP  to LNS1 tnlid 30255
*Apr 23 08:57:59.615:  Tnl 35837 L2TP: Control channel retransmit delay 
set to 1 seconds
*Apr 23 08:57:59.615:  Tnl 35837 L2TP: Tunnel state change from idle to 
wait-ctl-reply
*Apr 23 08:57:59.623:  Tnl 35837 L2TP: I SCCCN from LNS1 tnl 30255
*Apr 23 08:57:59.623:  Tnl 35837 L2TP: Got a Challenge Response in 
SCCCN from LNS1
*Apr 23 08:57:59.623:  Tnl 35837 L2TP: Tunnel Authentication success
*Apr 23 08:57:59.623:  Tnl 35837 L2TP: Tunnel state change from 
wait-ctl-reply to establ
ished
*Apr 23 08:57:59.623:  Tnl 35837 L2TP: SM State established
*Apr 23 08:57:59.627:  Tnl 35837 L2TP: I ICRQ from LNS1 tnl 30255
*Apr 23 08:57:59.627:  Tnl/Sn 35837/9 L2TP: Session FS enabled
*Apr 23 08:57:59.627:  Tnl/Sn 35837/9 L2TP: Session state change 
from idle to wait-conne
ct
*Apr 23 08:57:59.627:  Tnl/Sn 35837/9 L2TP: New session created
*Apr 23 08:57:59.627:  Tnl/Sn 35837/9 L2TP: O ICRP to LNS1 30255/22
*Apr 23 08:57:59.627:  Tnl 35837 L2TP: Control channel retransmit 
delay set to 1 seconds
*Apr 23 08:57:59.635:  Tnl/Sn 35837/9 L2TP: I ICCN from LNS1 tnl 30255, cl 22
*Apr 23 08:57:59.635: user@cisco.com Tnl/Sn 35837/9 L2TP: Session state
change from wait - connect to wait-for-service-selection
*Apr 23 08:57:59.635: ppp8 PPP: Phase is ESTABLISHING
*Apr 23 08:57:59.635: ppp8 LCP: I FORCED rcvd CONFACK len 11
*Apr 23 08:57:59.635: ppp8 LCP:    AuthProto CHAP (0x0305C22305)
*Apr 23 08:57:59.635: ppp8 LCP:    MagicNumber 0x050E44FB (0x0506050E44FB)
*Apr 23 08:57:59.635: ppp8 LCP: I FORCED sent CONFACK len 23
*Apr 23 08:57:59.635: ppp8 LCP:    MagicNumber 0x9028FFED (0x05069028FFED)
*Apr 23 08:57:59.635: ppp8 LCP:    EndpointDisc 1 user@cisco.com
*Apr 23 08:57:59.635: ppp8 LCP:     (0x1311017573657240636973636F2E636F)
*Apr 23 08:57:59.635: ppp8 LCP:     (0x6D)
*Apr 23 08:57:59.635: ppp8 PPP: Phase is FORWARDING, Attempting Forward
*Apr 23 08:57:59.639: ppp8 PPP: Phase is AUTHENTICATING, Unauthenticated User
*Apr 23 08:57:59.639: ppp8 PPP: Phase is FORWARDING, Attempting Forward
*Apr 23 08:57:59.639: VT[Vi2]:Sending vaccess request, id 0x73000015
*Apr 23 08:57:59.639: VT:Processing vaccess requests, 1 outstanding
*Apr 23 08:57:59.639: VT:Create and clone subif, base Vi2 Vt1
*Apr 23 08:57:59.639: VT[Vi2.1]:Reuse subinterface, recycle queue size 1
*Apr 23 08:57:59.639: VT[Vi2.1]:Recycled subinterface becomes Vi2.1
*Apr 23 08:57:59.639: VT[Vi2.1]:Cloning a recycled vaccess
*Apr 23 08:57:59.639: VT[Vi2.1]:Processing vaccess response, 
id 0x73000015, result success (1)
*Apr 23 08:57:59.643: Vi2.1 Tnl/Sn 35837/9 L2TP: 
Virtual interface created for user@cisco.com, bandwidth 64 Kbps
*Apr 23 08:57:59.643: Vi2.1 Tnl/Sn 35837/9 L2TP: VPDN session up
*Apr 23 08:57:59.643: Vi2.1 Tnl/Sn 35837/9 L2TP: 
Session state change from wait-for-service-selection to established
*Apr 23 08:57:59.643: Vi2.1 PPP: Phase is AUTHENTICATING, Authenticated User
*Apr 23 08:57:59.643: Vi2.1 CHAP: O SUCCESS id 1 len 4
*Apr 23 08:57:59.643: Vi2.1 PPP: Phase is UP
*Apr 23 08:57:59.643: Vi2.1 PPP: Process pending ncp packets
*Apr 23 08:57:59.643: Vi2.1 IPCP: O CONFREQ [Closed] id 1 len 10
*Apr 23 08:57:59.643: Vi2.1 IPCP:    Address 192.168.1.1 (0x0306C0A80101)
*Apr 23 08:57:59.667: Vi2.1 IPCP: I CONFREQ [REQsent] id 125 len 10
*Apr 23 08:57:59.667: Vi2.1 IPCP:    Address 0.0.0.0 (0x030600000000)
*Apr 23 08:57:59.667: Vi2.1 AAA/AUTHOR/IPCP: Start.  Her address 0.0.0.0, 
we want 0.0.0.0
*Apr 23 08:57:59.667: Vi2.1 AAA/AUTHOR/IPCP: Done.  Her address 0.0.0.0, 
we want 0.0.0.0
*Apr 23 08:57:59.667: Vi2.1: Pools to search : VpdnUsers
*Apr 23 08:57:59.667: Vi2.1: Pool VpdnUsers returned address = 192.168.1.2
*Apr 23 08:57:59.667: Vi2.1 IPCP: Pool returned 192.168.1.2
*Apr 23 08:57:59.667: Vi2.1 IPCP: O CONFNAK [REQsent] id 125 len 10
*Apr 23 08:57:59.667: Vi2.1 IPCP:    Address 192.168.1.2 (0x0306C0A80102)
*Apr 23 08:57:59.683: Vi2.1 IPCP: I CONFACK [REQsent] id 1 len 10
*Apr 23 08:57:59.683: Vi2.1 IPCP:    Address 192.168.1.1 (0x0306C0A80101)
*Apr 23 08:57:59.699: Vi2.1 IPCP: I CONFREQ [ACKrcvd] id 126 len 10
*Apr 23 08:57:59.699: Vi2.1 IPCP:    Address 192.168.1.2 (0x0306C0A80102)
*Apr 23 08:57:59.699: Vi2.1 IPCP: O CONFACK [ACKrcvd] id 126 len 10
*Apr 23 08:57:59.699: Vi2.1 IPCP:    Address 192.168.1.2 (0x0306C0A80102)
*Apr 23 08:57:59.699: Vi2.1 IPCP: State is Open
*Apr 23 08:57:59.703: Vi2.1 IPCP: Install route to 192.168.1.2
*Apr 23 08:57:59.703: Vi2.1 IPCP: Add link info for cef entry 192.168.1.2
LNS2#

相關資訊

修訂記錄

修訂 發佈日期 意見
1.0
19-Nov-2007
初始版本

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