Current configuration : 2752 bytes ! version 12.1 service timestamps debug uptime service timestamps log uptime no service passWord-encryption ! hostname R1 username R2 password 0 cisco ! ip subnet-zero no ip domain-lookup isdn switch-type basic-iietS ! interface Loopback0 ip address 10.1.1.1255.255.255.0
interface BRIO ip address 192.168.1.1255.255.255.0 encapsuSation ppp dialer idle-timeout 300 dialer map ip 192.168.1.2 name R2 broadcast 80000002 dialer load-threshold 128 dialer-group 1 no cdp enable ppp authentication chap PPP multilink ! ip classless ip route 10.1.2.0 255.255.255.0 192.168.1.2 ! dialer-list 1 PRotocol ip permit line con 0 transport input none line aux 0 transport input all line vty 0 4 login ! end
第2段：R2的配置清单 R2#sh run Building configuration...
Current configuration : 1086 bytes ! version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption service udp-small-servers service tcp-small-servers ! hostname R2 ! useriiame R1 password 0 cisco ! ip subnet-zero no ip finger ! isdn switch-type basic"net3 ! interface Loopback0 ip address 10.1.2.1255.255.255.0 ! interface BRIO ip address 192.168.1.2 255.255.255.0 encapsiiSation ppp dialer idle-timeout 300 dialer map ip 192.168.1.1 name Rl broadcast 80000001 dialer load-threshold 128 dialer-group 1 no cdp enable ppp authentication chap ppp multilink ! ip classless ip route 10.1.1.0 255.255.255.0 192.168.1.1 ! dialer-list 1 protocol ip permit ! line con 0 transport input none line aux 0 transport input all line vty 0 4 login ! end 第3段：监测配置结果 R1#debug ppp authentication PPP authentication debugging is on R1#ping 10.1.2.1
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.2.1, timeout is 2 seconds: 03:17:15: %LINK-3-UPDOWN: Interface BRIO:1, changed state to up 03:17:15: BRO:1 PPP: Treating connection as a callout 03:17:15: %ISDN-6-CONNECT: Interface BRIO:1 is now connected to 80000002 03:17:17:BRIO:1 CHAP:O CHALLENGE id 5 len 23 from"R1" 03:17:17:BRIO:1 CHAP:I CHALLENGE id 2 len 23 from"R2" 03:17:17:BRIO:1 CHAP:O RESPONSE id 2 len 23 from"R1" 03:17:17:BRIO:1 CHAP:I SUCCESS id 2 len 4 03:17:17:BRIO:1 CHAP:I RESPONSE id 5 len 23 from"R2" 03:17:17:BRIO:1 CHAP:O SUCCESS id 5 len 4 Success rate is 60 percent (3/5), round-trip min/avg/max == 36/37/40 ms 03:17:18: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRIO:1, changed state to up R1#ping 10.1.2.1
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.2.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms R1#sh dialer map R1#debug isdn q921 ISDN Q921 packets debugging is on 03:22:38:ISDN BRO:RX<- RRp sapi=0 tei=66 nr=0 03:22:38:ISDN BRO:TX<- RRf sapi=0 tei=66 nr=0 03:22:38:ISDN BRO:RX<- RRp sapi=0 tei=70 nr=0 03:22:38:ISDN BRO:RX<- RRf sapi=0 tei=70 nr=0 03:22:48: ISDN BRO:TX-> RRpsapi=O tei=66 nr=0 03:22:48: ISDN BRO: RX <- RRp sapi=0 tei=66 nr=0 03:22:48: ISDN BRO:TX-> RRfsapi=0 tei=66 nr=0 03:22:48: ISDN BRO: RX<- RRfsapi=0 tei=66 nr=0 03:22:48: ISDN BRO: RX <- RRp sapi=0 tei=70 nr=0 03:22:48: ISDN BRO: RX <- RRf sapi=0 tei=70 nr=0 R1#debug isdn q931 ISDN Q931 packets debugging is on R1#ping 10.1.2.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.2.1, timeout is 2 seconds: 03:24:33: ISDN BRO: TX -> SETUP pd = 8 callref = 0x04 03:24:33: Bearer Capability i=0x8890 03:24:33: Channel ID i=0x83 03:24:33: ISDN BRO: RX <- SETUP_ACK pd=8 callref=0x84 03:24:33: Channel ID i=0x89 03:24:33: ISDN BRO: RX <- CALL_PROC pd=8 callref=0x84 03:24:33: ISDN RX <- SETUP pd=8 callref=0x01 03:24:33: %LINK-3-UPDOWN: Interface BRIO: 1, changed state to up 03:24:33: %ISDN-6-CONNECT: Interface BRIO:2 is now connected to 80000002 03:24:34: ISDN BRO: RX<- RELEASE pd=8 callref=0x01 03:24:34: Cause i=Ox829A-Non-selected user clearing 03:24:34: ISDN BRO: TX-> RELEASE_COMP pd=8 callref=0x81 03:24:34: %ISDN-6-CONNECT: Interface BRIO: 1 is now connected to 80000002 03:24:34: ISDN BRO: RX <- RELEASE_COMP pd=8 callref =OxO1!!! Success rate is 60 percent (3/5), round-trip min/avg/max == 36/38/40 ms R1# 03:24:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRIO: 1, changed state to up 03:24:38: ISDN BRO: TX -> SETUP pd == 8 callref = 0x05 03:24:38: Bearer Capability i=0x8890 03:24:38: Channel ID i=0x83
R2#ping 10.1.1.1
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/114/412 ms 我们采用把R1和R2的同类配置同时列出并讲解的方法，以方便读者更好地理解配置。实验1中己经配置过的项目不再是我们讲解的重点。 (1)配置用户名和口令。 R1:USernam R2 password 0 Cisco R2:USemame R1 password 0 cisco 在R1上定义的用户名为R2，即拨号链路对端路由器名(由hostname所
