第1段：配置R1网络接口 R1# R1#show controllers serial 0 HD unit 0, idb = 0x95659C, driver stmcture at 0x95C910 buffer size 1524 HD unit 0, V.35 DCE cable cpb = 0xE2, eda = 0x2904, cda = 0x2918 RX ring with 16 entries at OxE22800 00 bd_ptr==0x2800 pak=0x95DB94 ds=0xE25A4C status==80 pak_size=22 01 bd_ptr=0x2814 pak=0x960328 ds=0xE2CCC8 status=80 pak_size=22 ...(类似内容，省略多行) 0 missed datagrams, 0 overruns 0 bad datagram encapsulations, 0 memory errors 0 transmitter underruns 0 residual bit errors R1#sh controllers ser 1 HD unit 1, idb = 0x961614, driver strUCture at 0x967988 buffer size 1524 HD unit 1, cpb = 0xE3, eda = 0x850, cda = 0x864 RX ring with 16 entries at OxE30800 00 bd_ptr=0x0800 pak=Ox9690B4 ds==OxE34E80 status=80 pak_size=22 ...(类似内容，省略多行) 01 bd__ptr=0xl014 pak=0x000000 ds=0xE22EA4 status=80 pak_size=22 0 missed datagrams, 0 overruns 0 bad datagram encapsulations, 0 memory errors 0 transmitter underruns 0 residual bit errors R1#conft Enter configuration commands, one per line. End with CNTL/Z. R1(config)#no logg con R1config#int e0 R1(config-if)#ip addr 172.16.1.1255.255.255.0 R1(config-if)#no keepalive R1(config-if)#no shut R1(config-if)#mt sO R1(config-if)#ip addr 172.16.12.1 R1(config-if)#clockrate 500000 R1(config-if)#no sh R1(config-if)#bandwidth 500 R1(config-if)#int si R1(config-if)#ip addr 172.16.13.1 R1(config-if)#clockrate 500000 R1(config-if)#no sh R1(config-if)#bandwidth 500 R1(config-if)#^Z R1# R1#sh int s0 Seria10 is down,line PRotocol is down Hardware is HD64570 Internet address is 172.16.12.1/24 MTU 1500 bytes, BW 500 Kbit, DLY 20000 usec, reliability 255/255, txioad 1/255, rxioad 1/255 Encapsulation HDLC, loopback not set Keepalive set (10 sec) Last input 00:01:44, output 00:01:46, output hang never Last clearing of "show interface" counters 00:00:02 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue :0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC,0 frame, 0 overrun, 0 ignored, Ollort 0 packets output, 0 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=down RTS=down CTSsup 第2段：配置R2网络接口 Term_Server>2 [Resuming connection 2 to R2 ...] R2#sh contr ser 0 HD unit 0, idb = Oxl4DF9C, driver structure at 0x154310 buffer size 1524 HD unit 0, V.35 DTE cable cpb = 0x1, eda = 0x4878, cda == Ox488C RX ring with 16 entries at 0x4014800 00 bd@ptr=0x4800 pak=Oxl557E8 ds=Ox40187C4 status=80 pak_size=22 ...(类似内容，省略多行) 0 missed datagrams, 0 overruns 0 bad datagram encapsulations, 0 memory errors 0 transmitter underruns 0 residual bit errors R2#sh ser 1 HD unit 1, idb == 0x159014, driver structure at 0x15F388 buffer size 1524 HD unit 1, cpb = 0x2, eda = 0x3140, cda = 0x3000 RX ring with 16 entries at 0x4023000 00 bd_ptr==0x3000 pak=Oxl62B4C ds=Ox402CEOC status=80 pak_size=0 ...(类似内容，省略多行) 0 missed datagrams, 0 overruns 0 bad datagram encapsulations, 0 memory errors 0 transmitter underruns 0 residual bit errors
R2#conft Enter configuration commands, one per line. End with CNTL/Z. R2(config)#iso logg con R2(config)#int e0 R2(config-if)#ip addr 172.16.2.2 R2(config-if)#eo keepalive R2(config-if)#no sh R2(config-if)#lnt sO R2(config-if)#ip addr 172.16.12.2 R2(config-if)#no sh R1(config-if)#bandwidth 500 R2(config-if)#int s1 R2(config-if)#ip addr 172.16.23@2 R2(config-if)#clockr 64000 R2(config-if)#no sh R1(config-if)#baiidwldth 64 R2(config-if)#end R2#pmg 172.16.12.1
Type escape sequence to abort. Sending 5,100-byte ICMP Echos to 172.16.12.1,timeout is 2 seconds: !!!!! R2# 第3段：配置R3网络接口 Term_Server>3 [Resuming connection 3 to R3 ... ]
R3#conft Enter configuration commands, one per line. End with CNTL/Z. R3(config)#no logg con R3(config)#int e0 R3(config-if)#ip addr 172.16.3.3 255.255.255.0 R3(config-if)#no keepalive R3(config-if)#no sh R3(config-if)#int s0 R3(config-if)#ip addr 172.16.13.3 255.255.255.0 R3(config-if)#no sh R1(config-if)#bandwidth 500 R3(config-if)#int si R3(config-if)#ip addr 172.16.23.3 255.255.255.0 R1(config-if)#bandwidth 64 R3(config-if)#end R3#ping 172.16.13.1
Type escape sequence to abort. Sending 5,100-byte ICMP Echos to 172.16.13.1,timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), R3#ping 172.16.23.2
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.23,2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max=32/121/480 ms R3#
