PPP背对背连接

前言

本文为点对点协议(PPP)背对背连接提供示例配置。 您能使用它验证您的连接和硬件适当地运作。

硬件和软件版本

• 此配置是可适用的对所有Cisco IOS软件版本。
• DCE边用广域网DCE电缆连接。
• DTE边用广域网DTE电缆连接。

欲知关于广域网DCE/D TE电缆的更多信息参见 说明文件。

网络图

本文根据以下配置：

在此配置， Prasit作为DCE和Spicey是DTE。

配置

Prasit

interface Serial0
   ip address 5.0.2.1 255.255.255.0
   encapsulation ppp
   clockrate 64000
   no cdp enable
 

Spicey

interface Serial1
   ip address 5.0.2.2 255.255.255.0
   encapsulation ppp
   no cdp enable
 

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show命令
使用以下show命令测试您的网络适当地运行：

show controllers
ping
show interfaces serial x
如下所示的输出是输入这些命令的结果在我们在此示 例配置使用的设备。

我们能使用 show controllers命令表示， Prasit是DCE和Spicey是DTE。 此命令提供您信息物理层是否 工作并且什么类型的电缆连接。

    prasit#show controllers serial 0
    HD unit 0, idb = 0x1D3A2C, driver structure at 0x1DAFE8
    buffer size 1524 HD unit 0, V.35 DCE cable, clockrate 64000
    spicey#show controllers serial 1
    HD unit 1, idb = 0x153E94, driver structure at 0x15A1F8
    buffer size 1524 HD unit 1, V.35 DTE cable
Prasit
prasit#ping 5.0.2.2            Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 5.0.2.2, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 32/32/32 ms
 prasit#show interfaces serial 0Serial0 is up, line protocol is up   Hardware is HD64570  Internet address is 5.0.2.1/24  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,      reliability 255/255, txload 1/255, rxload 1/255  Encapsulation PPP, loopback not set  Keepalive set (10 sec)  LCP Open  Open: IPCP  Last input 00:00:05, output 00:00:05, output hang never  Last clearing of "show interface" counters 00:09:58  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0  Queueing strategy: weighted fair  Output queue: 0/1000/64/0 (size/max total/threshold/drops)      Conversations  0/1/256 (active/max active/max total)     Reserved Conversations 0/0 (allocated/max allocated)     Available Bandwidth 1158 kilobits/sec  5 minute input rate 0 bits/sec, 1 packets/sec  5 minute output rate 0 bits/sec, 0 packets/sec     122 packets input, 2824 bytes, 0 no buffer     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort     132 packets output, 2964 bytes, 0 underruns     0 output errors, 0 collisions, 2 interface resets     0 output buffer failures, 0 output buffers swapped out     6 carrier transitions     DCD=up  DSR=up  DTR=up  RTS=up  CTS=upprasit#
Spicey

spicey#ping 5.0.2.1       
 Type escape sequence to abort.
 Sending 5, 100-byte ICMP Echos to 5.0.2.1, timeout is 2 seconds:
 !!!!!
 Success rate is 100 percent (5/5), round-trip min/avg/max = 32/32/32 ms
 spicey#show interfaces serial 1
 Serial1 is up, line protocol is up
   Hardware is HD64570
   Internet address is 5.0.2.2/24
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
      reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   Keepalive set (10 sec)
   LCP Open
   Open: IPCP
   Last input 00:00:01, output 00:00:01, output hang never
   Last clearing of "show interface" counters 00:09:27
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops)
      Conversations  0/1/256 (active/max active/max total)
      Reserved Conversations 0/0 (allocated/max allocated)
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
      130 packets input, 3392 bytes, 0 no buffer
      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
      129 packets output, 3378 bytes, 0 underruns
      0 output errors, 0 collisions, 0 interface resets
      0 output buffer failures, 0 output buffers swapped out
      0 carrier transitions
      DCD=up  DSR=up  DTR=up  RTS=up  CTS=up
 spicey#