PPP背对背连接
2006-04-19   www.net130.com

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/DTE电缆的更多信息参见 串行电缆 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

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

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#