广域网 : 点对点协议 (PPP)

配置使用外部调制解调器的 PPP 拨入

2015 年 8 月 28 日 - 机器翻译
其他版本: PDFpdf | 英语 (2015 年 4 月 22 日) | 反馈


目录


简介

使用外置调制解调器,本文说明一点对点协议(PPP)拨入配置。

先决条件

要求

您需要配置您要能拨号的每个用户的一个用户名和密码,因为此配置没有一个终端接入控制器访问控制器系统(TACACS+)或远程验证拨入用户服务(RADIUS)服务器。所有IP地址被递交给从池的客户端。

对于此配置,您需要以下:

  • 用户名和密码您希望客户端使用(即使您是去的后添加TACACS+或的RADIUS,添加一些名称到路由器测试线路)。

  • IP编址方案创建的池和静态路由的。

使用的组件

本文档中的信息基于以下软件和硬件版本。

  • 在清除配置实验室环境的一Cisco2511。

  • 在路由器的Cisco IOS�版本12.2(10b)。

  • 外部异步调制解调器四个编号。

本文档中的信息都是基于特定实验室环境中的设备创建的。本文档中使用的所有设备最初均采用原始(默认)配置。如果您使用的是真实网络,请确保您在使用任何命令前已经了解其潜在影响。

相关产品

此配置还可用于以下硬件和软件版本:

  • 有异步接口和serial interfaces的路由器能够配置异步接口。

  • 可以使用WIC-2A/S, 8或者16异步端口serial interfaces。

规则

有关文档规则的详细信息,请参阅 Cisco 技术提示规则

配置

本部分提供有关如何配置本文档所述功能的信息。

注意: 要查找本文档所用命令的其他信息,请使用命令查找工具仅限注册用户)。

网络图

本文档使用此图所示的网络设置。

/image/gif/paws/9581/pppdialup_a.gif

配置

本文档使用如下所示的配置。

此配置是在一个2511系列路由器的测试的使用Cisco IOS软件版本12.2(10b)。相同的配置概念将适用于一个相似的路由器结构或其他Cisco IOS版本从11.0(3)开始或以后。

Cisco 2511
Current configuration:
!
version 12.2


service timestamps debug datetime msec
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname router1
!
enable secret <deleted>
!
username jason password foo
username laura password letmein
username russ password opensesame
username syed password bar
username tito password knockknock

!--- Usernames and passwords for clients making incoming calls.


modemcap entry default

!--- Modemcap named "default" is applied to the line 2 and line 3 
!--- of Serial interfaces. Refer to the Modem-Router Connection Guide 
!--- and modemcap entry for more information.

!
interface Ethernet0
 ip address 192.168.39.1 255.255.255.0
!
interface Serial0
 no ip address
!
interface Serial1
 no ip address
!
interface Group-Async1

!--- Async configuration for the external modems.

 ip unnumbered ethernet0
 encapsulation ppp
 async mode interactive
 peer default ip address pool dialup

 !--- Assigns ip address for incoming calls 
!--- from the "dialup" pool.

 no cdp enable
 ppp authentication chap
 group-range 1 16

!--- Includes lines 1 through 16 in the group-async1 interface.

!
ip local pool dialup 192.168.39.239 192.168.39.254

!--- Defines the range of ip addresses available 
!--- to the "dialup" pool.

!
line con 0
 login 
line 1 16

!--- Line configuration for the external modems.

 login local
 
!--- Authenticate incoming calls locally with username and password
 !--- configured on the router. 

 autoselect during-login
 autoselect ppp
 
!--- Launch PPP when PPP packets are received from the client.

 modem InOut

 !--- Allow incoming and outgoing calls.

 transport input all
 
 modem autoconfigure type default

 !--- Apply the modemcap "default" (configured previously) to initalize 
 !--- the modem. Refer to the link Modem-Router Connection Guide 
!--- for more information.

 stopbits 1 flowcontrol hardware

line aux 0
line vty 0 4
 exec-timeout 20 0
 password letmein
 login
!         
end

对于远程用户要随机连接到他们的短时长时间的中心局间隔,此种拨号连接提供一更加便宜的解决方案。在上述配置中用户拨号从他的在调制解调器的桌面和设立一PPP连接到中心局通过PSTN网络。

要实施此配置,您必须进行以下配置:

验证

本部分所提供的信息可用于确认您的配置是否正常工作。

命令输出解释程序工具仅限注册用户)支持某些 show 命令,使用此工具可以查看对 show 命令输出的分析。

  • show users

  • show interface

  • show line

  • show ip route

router1#show users
Line       User       Host(s)              Idle       Location
*  0 con 0                idle                 00:00:00      
1 tty 1     jason      Async interface      00:00:34   PPP: 192.168.39.240
3 tty 3                Modem Autoconfigure  00:00:00      
4 tty 4                Modem Autoconfigure  00:00:00      
5 tty 5                Modem Autoconfigure  00:00:00      
6 tty 6                Modem Autoconfigure  00:00:01      
7 tty 7                Modem Autoconfigure  00:00:01      
8 tty 8                Modem Autoconfigure  00:00:01      
9 tty 9                Modem Autoconfigure  00:00:01     
10 tty 10               Modem Autoconfigure  00:00:01     
11 tty 11               Modem Autoconfigure  00:00:01     
12 tty 12               Modem Autoconfigure  00:00:00     
13 tty 13               Modem Autoconfigure  00:00:00     
14 tty 14               Modem Autoconfigure  00:00:01     
15 tty 15               Modem Autoconfigure  00:00:01     
16 tty 16               Modem Autoconfigure  00:00:00 
 
Interface  User  Mode  Idle  Peer  Address

router1#show interface asynchronous 1
Async1 is up, line protocol is up   
Hardware is Async Serial  
Interface is unnumbered. Using address of Ethernet0 (192.168.39.1)  
MTU 1500 bytes, BW 115 Kbit, DLY 100000 usec,
      reliability 255/255, txload 1/255, rxload 1/255  
Encapsulation PPP, loopback not set  Keepalive not set  
DTR is pulsed for 5 seconds on reset  
LCP Open  
Open: IPCP  
Last input 00:00:28, output 00:00:43, output hang never  
Last clearing of "show interface" counters 00:29:49  
Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 0  
Queueing strategy: weighted fair  
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
      Conversations  0/1/16 (active/max active/max total )
      Reserved Conversations 0/0 (allocated/max allocated)     
      Available Bandwidth 86 kilobits/sec  
5 minute input rate 0 bits/sec, 0 packets/sec  
5 minute output rate 0 bits/sec, 0 packets/sec     
     34 packets input, 3147 bytes, 0 no buffer     
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles     
     2 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 
16 packets output, 383 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions

router1#show line    
Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int
*    0 CTY              -    -      -    -    -      0       0     0/0       -
A    1 TTY 115200/115200- inout     -    -    -      1       1     0/0       -
*    2 TTY  38400/38400 - inout     -    -    -      0       0     0/0       -
*    3 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*    4 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*    5 TTY   1200/1200  - inout     -    -    -      0       0     0/0       -
*    6 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*    7 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*    8 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*    9 TTY   1200/1200  - inout     -    -    -      0       0     0/0       -
*   10 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*   11 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*   12 TTY 115200/115200- inout     -    -    -      0       0     0/0       -
*   13 TTY 115200/115200- inout     -    -    -      0       0     0/0       -
*   14 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*   15 TTY    300/300   - inout     -    -    -      0       0     0/0       -
*   16 TTY    300/300   - inout     -    -    -      0       0     0/0       -
    17 AUX   9600/9600  -    -      -    -    -      0       0     0/0       -
    18 VTY              -    -      -    -    -      0       0     0/0       -
    19 VTY              -    -      -    -    -      0       0     0/0       -
    20 VTY              -    -      -    -    -      0       0     0/0       -
    21 VTY              -    -      -    -    -      0       0     0/0       -

router1#show line 1   
Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int
A    1 TTY 115200/115200- inout     -    -    -      1       1     0/0       -

Line 1, Location: "PPP: 192.168.39.240", Type: ""
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 115200/115200, no parity, 1 stopbits, 8 databits
Status: Ready, Active, No Exit Banner, Async Interface Active
 Modem Detected, CTS Raised
Capabilities: Hardware Flowcontrol In, Hardware Flowcontrol Out
  Modem Callout, Modem RI is CD, Line usable as async interface
  Modem Autoconfigure
Modem state: Ready
Group codes: 0
Line is running PPP for address 192.168.39.240.  
0 output packets queued, 1 input packets.  
Async Escape map is 00000000000000000000000000000000
Modem hardware state: CTS DSR DTR RTS, Modem Configured
Special Chars: Escape Hold Stop Start Disconnect Activation
  ^^x none - - none 
Timeouts: Idle EXEC Idle Session Modem Answer Session Dispatch 
00:10:00 never none not set  
Idle Session Disconnect Warning  
never 

router1#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
        N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route 

Gateway of last resort is not set 

C 192.168.39.0/24 is directly connected, Ethernet0

在Windows 2000服务器主机上

设置在Windows 2000主机的拨号连接。配置用户名、密码和电话号码并且拨号连接。

/image/gif/paws/9581/pppdialup_b.gif

在拨号连接建立后, IP地址从在路由器配置的拨号池分配。我们能通过发出在主机的ipconfig命令验证那。它显示作为在主机的一台PPP适配器。

   C:\Documents and Settings\Administrator>ipconfig
Windows 2000 IP Configuration
Ethernet adapter Local Area Connection:
 Media State . . . . . . . . . . . : Cable Disconnected
PPP adapter Dial-up Connection:
 Connection-specific DNS Suffix . :
   IP Address. . . . . . . . . . . . : 192.168.39.240
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . : 192.168.39.240

要验证从Windows 2000服务器主机的连接建立到Cisco 2511路由器,您能从主机ping到路由器以太网端口和验证连接建立。这里, 192.168.39.1是路由器的以太网端口IP地址。

C:\Documents and Settings\Administrator>ping 192.168.39.1
Pinging 192.168.39.1 with 32 bytes of data:
Reply from 192.168.39.1: bytes=32 time=170ms TTL=255
   Reply from 192.168.39.1: bytes=32 time=111ms TTL=255
   Reply from 192.168.39.1: bytes=32 time=110ms TTL=255
   Reply from 192.168.39.1: bytes=32 time=100ms TTL=255
Ping statistics for 192.168.39.1:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
   Approximate round trip times in milli-seconds:
   Minimum = 100ms, Maximum = 170ms, Average = 122ms
    

故障排除

本部分提供的信息可用于对配置进行故障排除。

故障排除命令

命令输出解释程序工具仅限注册用户)支持某些 show 命令,使用此工具可以查看对 show 命令输出的分析。

注意: 在发出 debug 命令之前,请参阅有关 Debug 命令的重要信息

  • debug ppp negotiation - 用于查看客户端是否通过 PPP 协商。这是您检查地址协商的时候。

  • debug ppp authentication -看见客户端可以是否通过认证。

  • debug ppp error - 显示和PPP连接协商与操作相关的协议错误以及统计错误。

  • debug modem - 用于查看路由器从调制解调器接收的信号是否正确。

  • show line [- tty line] -正在寻找调制解调器硬件状态。

以下输出从Cisco 2511路由器得到了。显示Windows 2000服务器拨号对PSTN Cisco2511的链路和建立PPP连接的他们。

router1#debug ppp negotiation
PPP protocol negotiation debugging is on
router1#debug vtemplate
Virtual Template debugging is on
router1#show debug
PPP:
  PPP protocol negotiation debugging is on
Dec 10 18:43:59.079: As1 LCP: I CONFREQ [Closed] id 1 len 50
Dec 10 18:43:59.083: As1 LCP:    ACCM 0x00000000 (0x020600000000)
Dec 10 18:43:59.087: As1 LCP:    MagicNumber 0x59F402A1 (0x050659F402A1)
Dec 10 18:43:59.087: As1 LCP:    PFC (0x0702)
Dec 10 18:43:59.091: As1 LCP:    ACFC (0x0802)
Dec 10 18:43:59.091: As1 LCP:    Callback 6  (0x0D0306)
Dec 10 18:43:59.095: As1 LCP:    MRRU 1614 (0x1104064E)
Dec 10 18:43:59.099: As1 LCP:    EndpointDisc 1 Local
Dec 10 18:43:59.099: As1 LCP:     (0x131701714C44F0EC8F45BABDC596D14B)
Dec 10 18:43:59.103: As1 LCP:     (0x79DB5300000000)
Dec 10 18:43:59.107: As1 LCP: Lower layer not up, Fast Starting
Dec 10 18:43:59.107: As1 PPP: Treating connection as a dedicated line
Dec 10 18:43:59.111: As1 PPP: Phase is ESTABLISHING, 
Active Open [0 sess, 0 load]
Dec 10 18:43:59.115: As1 LCP: O CONFREQ [Closed] id 3 len 25
Dec 10 18:43:59.119: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Dec 10 18:43:59.123: As1 LCP:    AuthProto CHAP (0x0305C22305)
Dec 10 18:43:59.127: As1 LCP:    MagicNumber 0x002AF05C (0x0506002AF05C)
Dec 10 18:43:59.127: As1 LCP:    PFC (0x0702)
Dec 10 18:43:59.131: As1 LCP:    ACFC (0x0802)
Dec 10 18:43:59.135: As1 LCP: O CONFREJ [REQsent] id 1 len 11
Dec 10 18:43:59.139: As1 LCP:    Callback 6  (0x0D0306)
Dec 10 18:43:59.139: As1 LCP:    MRRU 1614 (0x1104064E)
Dec 10 18:43:59.155: %LINK-3-UPDOWN: Interface Async1, 
changed state to up
Dec 10 18:43:59.263: As1 LCP: I CONFACK [REQsent] id 3 len 25
Dec 10 18:43:59.267: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)
Dec 10 18:43:59.267: As1 LCP:    AuthProto CHAP (0x0305C22305)
Dec 10 18:43:59.271: As1 LCP:    MagicNumber 0x002AF05C (0x0506002AF05C)
Dec 10 18:43:59.275: As1 LCP:    PFC (0x0702)
Dec 10 18:43:59.275: As1 LCP:    ACFC (0x0802)
Dec 10 18:43:59.279: As1 LCP: I CONFREQ [ACKrcvd] id 2 len 43
Dec 10 18:43:59.283: As1 LCP:    ACCM 0x00000000 (0x020600000000)
Dec 10 18:43:59.287: As1 LCP:    MagicNumber 0x59F402A1 (0x050659F402A1)
Dec 10 18:43:59.287: As1 LCP:    PFC (0x0702)
Dec 10 18:43:59.291: As1 LCP:    ACFC (0x0802)
Dec 10 18:43:59.291: As1 LCP:    EndpointDisc 1 Local
Dec 10 18:43:59.295: As1 LCP:     (0x131701714C44F0EC8F45BABDC596D14B)
Dec 10 18:43:59.299: As1 LCP:     (0x79DB5300000000)
Dec 10 18:43:59.303: As1 LCP: O CONFACK [ACKrcvd] id 2 len 43
Dec 10 18:43:59.307: As1 LCP:    ACCM 0x00000000 (0x020600000000)
Dec 10 18:43:59.311: As1 LCP:    MagicNumber 0x59F402A1 (0x050659F402A1)
Dec 10 18:43:59.311: As1 LCP:    PFC (0x0702)
Dec 10 18:43:59.315: As1 LCP:    ACFC (0x0802)
Dec 10 18:43:59.315: As1 LCP:    EndpointDisc 1 Local
Dec 10 18:43:59.319: As1 LCP:     (0x131701714C44F0EC8F45BABDC596D14B)
Dec 10 18:43:59.323: As1 LCP:     (0x79DB5300000000)
Dec 10 18:43:59.327: As1 LCP: State is Open
Dec 10 18:43:59.327: As1 PPP: Phase is AUTHENTICATING, 
by this end [0 sess, 1 load]
Dec 10 18:43:59.331: As1 CHAP: O CHALLENGE id 2 len 25 from "router1"
Dec 10 18:43:59.459: As1 LCP: I IDENTIFY [Open] id 3 len 18 magic 
0x59F402A1 MSRASV5.00
Dec 10 18:43:59.463: As1 LCP: I IDENTIFY [Open] id 4 len 28 magic 
0x59F402A1 
MSRAS-1-LAB-WIN2K-PC
Dec 10 18:43:59.467: As1 CHAP: I RESPONSE id 2 len 26 from "jason"
Dec 10 18:43:59.479: As1 CHAP: O SUCCESS id 2 len 4
Dec 10 18:43:59.483: As1 PPP: Phase is UP [0 sess, 1 load]
Dec 10 18:43:59.487: As1 IPCP: O CONFREQ [Closed] id 1 len 10
Dec 10 18:43:59.491: As1 IPCP:    Address 192.168.39.1 
(0x0306C0A82701)
Dec 10 18:43:59.567: As1 CCP: I CONFREQ [Not negotiated] id 5 len 10
Dec 10 18:43:59.571: As1 CCP:    MS-PPC supported bits 0x00000001 
(0x120600000001)
Dec 10 18:43:59.575: As1 LCP: O PROTREJ [Open] id 4 len 16 protocol CCP 
(0x80FD0105000A120600000001)
Dec 10 18:43:59.599: As1 IPCP: I CONFREQ [REQsent] id 6 len 40
Dec 10 18:43:59.603: As1 IPCP:    CompressType VJ 15 slots CompressSlotID 
(0x0206002D0F01)
Dec 10 18:43:59.607: As1 IPCP:    Address 0.0.0.0 (0x030600000000)
Dec 10 18:43:59.611: As1 IPCP:    PrimaryDNS 0.0.0.0 (0x810600000000)
Dec 10 18:43:59.615: As1 IPCP:    PrimaryWINS 0.0.0.0 (0x820600000000)
Dec 10 18:43:59.615: As1 IPCP:    SecondaryDNS 0.0.0.0 (0x830600000000)
Dec 10 18:43:59.619: As1 IPCP:    SecondaryWINS 0.0.0.0 (0x840600000000)
Dec 10 18:43:59.623: As1 IPCP: O CONFREJ [REQsent] id 6 len 34
Dec 10 18:43:59.627: As1 IPCP:    CompressType VJ 15 slots CompressSlotID 
(0x0206002D0F01)
Dec 10 18:43:59.631: As1 IPCP:    PrimaryDNS 0.0.0.0 (0x810600000000)
Dec 10 18:43:59.635: As1 IPCP:    PrimaryWINS 0.0.0.0 (0x820600000000)
Dec 10 18:43:59.639: As1 IPCP:    SecondaryDNS 0.0.0.0 (0x830600000000)
Dec 10 18:43:59.643: As1 IPCP:    SecondaryWINS 0.0.0.0 (0x840600000000)
Dec 10 18:43:59.647: As1 IPCP: I CONFACK [REQsent] id 1 len 10
Dec 10 18:43:59.651: As1 IPCP:    Address 192.168.39.1 (0x0306C0A82701)
Dec 10 18:43:59.735: As1 IPCP: I CONFREQ [ACKrcvd] id 7 len 10
Dec 10 18:43:59.739: As1 IPCP:    Address 0.0.0.0 (0x030600000000)
Dec 10 18:43:59.743: As1 IPCP: O CONFNAK [ACKrcvd] id 7 len 10
Dec 10 18:43:59.747: As1 IPCP:    Address 192.168.39.240 
(0x0306C0A827F0)
Dec 10 18:43:59.835: As1 IPCP: I CONFREQ [ACKrcvd] id 8 len 10
Dec 10 18:43:59.839: As1 IPCP:    Address 192.168.39.240 (0x0306C0A827F0)
Dec 10 18:43:59.843: As1 IPCP: O CONFACK [ACKrcvd] id 8 len 10
Dec 10 18:43:59.847: As1 IPCP:    Address 192.168.39.240 (0x0306C0A827F0)
Dec 10 18:43:59.851: As1 IPCP: State is Open
Dec 10 18:43:59.863: As1 IPCP: Install route to 192.168.39.240
Dec 10 18:44:00.483: %LINEPROTO-5-UPDOWN: 
Line protocol on Interface Async1, changed state to up

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Document ID: 9581