试验配置如下：R1（CHAP）
Router>enRouter#conf tEnter configuration commands, one per line. End with CNTL/Z.Router(config)#host r1r1(config)#int s0/0r1(config-if)#ip addr 192.168.1.1 255.255.255.0r1(config-if)#clock rate 64000r1(config-if)#no shutr1(config-if)#encapsulation ppp 封装PPPr1(config-if)#ppp authen chap pap 在接口下使用本地加密方式chap来验证对端加密方式papr1(config-if)#ppp chap hostname r1 指定本地主机名称r1(config-if)#ppp chap password cisco 指定本地口令r1(config-if)#exitr1(config)#enable secret cisco 指定加密口令r1(config)#service password-encryption 口令加密r1(config)#username r2 password cisco 要验证的远程用户和口令
R2（PAP） Router>enRouter#conf tEnter configuration commands, one per line. End with CNTL/Z.Router(config)#host r2r2(config)#int s0/0r2(config-if)#ip addr 192.168.1.3 255.255.255.0r2(config-if)#no shutr2(config-if)#encapsulation ppp 封装PPPr2(config-if)#ppp authen pap chap 在接口下使用本地加密方式pap来验证对端加密方式chapr2(config-if)#ppp pap sent-username r2 password cisco指定要发送的用户和口令r2(config-if)#exitr2(config)#enable password cisco 指定发送的口令r2(config)#username r1 password cisco要验证的远程用户和口令r2(config)#exit 验证：show ip int s0/0Show int s0/0
R1
r1#show int s0/0Serial0/0 is up, line protocol is up Hardware is M4T Internet address is 192.168.1.1/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, LCP Open Open: IPCP, CDPCP, crc 16, loopback not set Keepalive set (10 sec) Restart-Delay is 0 secs Last input 00:00:05, output 00:00:00, output hang never Last clearing of "show interface" counters 00:01:28 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, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 30 packets input, 1059 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 40 packets output, 904 bytes, 0 underruns --More--
R2
r2#show int s0/0Serial0/0 is up, line protocol is up Hardware is M4T Internet address is 192.168.1.3/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, LCP Open Open: IPCP, CDPCP, crc 16, loopback not set Keepalive set (10 sec) Restart-Delay is 0 secs Last input 00:00:12, output 00:00:03, output hang never Last clearing of "show interface" counters 00:00:19 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, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 19 packets input, 297 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 18 packets output, 285 bytes, 0 underruns --More―端口和链路协议都为up状态，封装为PPP封装。Serial0/0 is up, line protocol is upEncapsulation PPP试验成功！
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