Why the lcp establishing procedure failed?

Hello,guys When I config dial-up access service ,dial-up have come into lcp establishing procedure but failed.debug ppp negotiation output is:

06:37:47: Se0 IPCP: Install route to 172.16.20.1 06:37:49: %LINK-3-UPDOWN: Interface Serial0, changed state to up 06:37:49: Se0 PPP: Treating connection as a callout 06:37:49: Se0 PPP: Phase is ESTABLISHING, Active Open 06:37:49: Se0 LCP: O CONFREQ [Closed] id 221 len 24 06:37:49: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:49: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:49: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:37:49: Se0 LCP: PFC (0x0702) 06:37:49: Se0 LCP: ACFC (0x0802) 06:37:49: Se0 LCP: I CONFREQ [REQsent] id 235 len 24 06:37:49: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:49: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:49: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:37:49: Se0 LCP: PFC (0x0702) 06:37:49: Se0 LCP: ACFC (0x0802) 06:37:49: Se0 LCP: O CONFNAK [REQsent] id 235 len 9 06:37:49: Se0 LCP: AuthProto CHAP (0x0305C22305) 06:37:51: Se0 LCP: TIMEout: State REQsent 06:37:51: Se0 LCP: O CONFREQ [REQsent] id 222 len 24 06:37:51: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:51: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:51: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:37:51: Se0 LCP: PFC (0x0702) 06:37:51: Se0 LCP: ACFC (0x0802) 06:37:51: Se0 LCP: I CONFREQ [REQsent] id 236 len 24 06:37:51: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:51: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:51: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:37:51: Se0 LCP: PFC (0x0702) 06:37:51: Se0 LCP: ACFC (0x0802) 06:37:51: Se0 LCP: O CONFNAK [REQsent] id 236 len 9 06:37:51: Se0 LCP: AuthProto CHAP (0x0305C22305) 06:37:53: Se0 LCP: TIMEout: State REQsent 06:37:53: Se0 LCP: O CONFREQ [REQsent] id 223 len 24 06:37:53: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:53: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:53: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:37:53: Se0 LCP: PFC (0x0702) 06:37:53: Se0 LCP: ACFC (0x0802) 06:37:53: Se0 LCP: I CONFREQ [REQsent] id 237 len 24 06:37:53: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:53: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:53: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:37:53: Se0 LCP: PFC (0x0702) 06:37:53: Se0 LCP: ACFC (0x0802) 06:37:53: Se0 LCP: O CONFNAK [REQsent] id 237 len 9 06:37:53: Se0 LCP: AuthProto CHAP (0x0305C22305) 06:37:55: Se0 LCP: TIMEout: State REQsent 06:37:55: Se0 LCP: O CONFREQ [REQsent] id 224 len 24 06:37:55: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:55: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:55: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:37:55: Se0 LCP: PFC (0x0702) 06:37:55: Se0 LCP: ACFC (0x0802) 06:37:55: Se0 LCP: I CONFREQ [REQsent] id 238 len 24 06:37:55: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:55: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:55: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:37:55: Se0 LCP: PFC (0x0702) 06:37:55: Se0 LCP: ACFC (0x0802) 06:37:55: Se0 LCP: O CONFNAK [REQsent] id 238 len 9 06:37:55: Se0 LCP: AuthProto CHAP (0x0305C22305) 06:37:57: Se0 LCP: TIMEout: State REQsent 06:37:57: Se0 LCP: O CONFREQ [REQsent] id 225 len 24 06:37:57: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:57: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:57: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:37:57: Se0 LCP: PFC (0x0702) 06:37:57: Se0 LCP: ACFC (0x0802) 06:37:57: Se0 LCP: I CONFREQ [REQsent] id 239 len 24 06:37:57: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:57: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:57: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:37:57: Se0 LCP: PFC (0x0702) 06:37:57: Se0 LCP: ACFC (0x0802) 06:37:57: Se0 LCP: O CONFNAK [REQsent] id 239 len 9 06:37:57: Se0 LCP: AuthProto CHAP (0x0305C22305) 06:37:59: Se0 LCP: TIMEout: State REQsent 06:37:59: Se0 LCP: O CONFREQ [REQsent] id 226 len 24 06:37:59: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:59: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:59: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:37:59: Se0 LCP: PFC (0x0702) 06:37:59: Se0 LCP: ACFC (0x0802) 06:37:59: Se0 LCP: I CONFREQ [REQsent] id 240 len 24 06:37:59: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:37:59: Se0 LCP: AuthProto PAP (0x0304C023) 06:37:59: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:37:59: Se0 LCP: PFC (0x0702) 06:37:59: Se0 LCP: ACFC (0x0802) 06:37:59: Se0 LCP: O CONFREJ [REQsent] id 240 len 8 06:37:59: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:00: Se0 LCP: I CONFREQ [REQsent] id 241 len 24 06:38:00: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:00: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:00: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:38:00: Se0 LCP: PFC (0x0702) 06:38:00: Se0 LCP: ACFC (0x0802) 06:38:00: Se0 LCP: O CONFREJ [REQsent] id 241 len 8 06:38:00: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:01: Se0 LCP: TIMEout: State REQsent 06:38:01: Se0 LCP: O CONFREQ [REQsent] id 227 len 24 06:38:01: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:01: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:01: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:38:01: Se0 LCP: PFC (0x0702) 06:38:01: Se0 LCP: ACFC (0x0802) 06:38:02: Se0 LCP: I CONFREQ [REQsent] id 242 len 24 06:38:02: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:02: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:02: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:38:02: Se0 LCP: PFC (0x0702) 06:38:02: Se0 LCP: ACFC (0x0802) 06:38:02: Se0 LCP: O CONFREJ [REQsent] id 242 len 8 06:38:02: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:03: Se0 LCP: TIMEout: State REQsent 06:38:03: Se0 LCP: O CONFREQ [REQsent] id 228 len 24 06:38:03: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:03: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:03: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:38:03: Se0 LCP: PFC (0x0702) 06:38:03: Se0 LCP: ACFC (0x0802) 06:38:04: Se0 LCP: I CONFREQ [REQsent] id 243 len 24 06:38:04: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:04: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:04: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:38:04: Se0 LCP: PFC (0x0702) 06:38:04: Se0 LCP: ACFC (0x0802) 06:38:04: Se0 LCP: O CONFREJ [REQsent] id 243 len 8 06:38:04: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:05: Se0 LCP: TIMEout: State REQsent 06:38:05: Se0 LCP: O CONFREQ [REQsent] id 229 len 24 06:38:05: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:05: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:05: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:38:05: Se0 LCP: PFC (0x0702) 06:38:05: Se0 LCP: ACFC (0x0802) 06:38:06: Se0 LCP: I CONFREQ [REQsent] id 244 len 24 06:38:06: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:06: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:06: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:38:06: Se0 LCP: PFC (0x0702) 06:38:06: Se0 LCP: ACFC (0x0802) 06:38:06: Se0 LCP: O CONFREJ [REQsent] id 244 len 8 06:38:06: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:07: Se0 LCP: TIMEout: State REQsent 06:38:07: Se0 LCP: O CONFREQ [REQsent] id 230 len 24 06:38:07: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:07: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:07: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:38:07: Se0 LCP: PFC (0x0702) 06:38:07: Se0 LCP: ACFC (0x0802) 06:38:09: Se0 LCP: I CONFREQ [REQsent] id 245 len 24 06:38:09: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:09: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:09: Se0 LCP: MagicNumber 0xB1B5C43B (0x0506B1B5C43B) 06:38:09: Se0 LCP: PFC (0x0702) 06:38:09: Se0 LCP: ACFC (0x0802) 06:38:09: Se0 LCP: O CONFREJ [REQsent] id 245 len 8 06:38:09: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:09: Se0 LCP: TIMEout: State REQsent 06:38:09: Se0 LCP: O CONFREQ [REQsent] id 231 len 24 06:38:09: Se0 LCP: ACCM 0x000A0000 (0x0206000A0000) 06:38:09: Se0 LCP: AuthProto PAP (0x0304C023) 06:38:09: Se0 LCP: MagicNumber 0xB22EC19F (0x0506B22EC19F) 06:38:09: Se0 LCP: PFC (0x0702) 06:38:09: Se0 LCP: ACFC (0x0802) 06:38:11: Se0 LCP: TIMEout: State REQsent 06:38:11: Se0 LCP: State is Listen 06:38:13: %LINK-5-CHANGED: Interface Serial0, changed state to reset 06:38:13: Se0 LCP: State is Closed 06:38:13: Se0 PPP: Phase is DOWN 06:38:16: Se0 IPCP: Remove route to 172.16.20.1 06:38:18: %LINK-3-UPDOWN: Interface Serial0, changed state to down 06:38:18: Se0 LCP: State is Closed Can anyone tell why ?
Reply to
asummit
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Hi,

The LCP negotiations fail on authentication protocol negotiation. One side is configured for PAP while the other side requests CHAP. At least some of the CONFREJ and CONFNAK messages suggest this to be the case. You're requesting PAP authentication and only accepting CHAP authentication, strange....

Erik

Reply to
Erik Tamminga

Ammm.....But both side is configured pap authentication.You can see the PPP's phase is Lcp ESTABLISHING,it's fail. Here is running-configure: snoopy#show run Building configuration...

Current configuration: ! version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname snoopy ! ! username kitty password 0 cisco ! ! ! ! memory-size iomem 25 ip subnet-zero no ip domain-lookup ! chat-script dial1 ABORT ERROR ABORT BUSY "" "ATZ" OK "ATDT\T" TIMEOUT

60 CONNECT \C ! ! ! interface Serial0 physical-layer async ip unnumbered FastEthernet0 encapsulation ppp dialer in-band dialer idle-timeout 300 dialer map ip 172.16.20.1 name kitty modem-script dial1 broadcast 81496912 dialer-group 1 async dynamic routing async mode dedicated peer default ip address 172.16.20.1 ppp authentication pap ! interface BRI0 no ip address shutdown ! interface FastEthernet0 ip address 172.16.10.1 255.255.255.0 speed auto ! router rip network 172.16.0.0 ! ip classless ip route 172.16.20.0 255.255.255.0 172.16.20.1 ip route 172.16.20.1 255.255.255.255 Serial0 no ip http server ! access-list 101 deny ip any host 255.255.255.255 access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! line con 0 exec-timeout 0 0 transport input none line 1 modem InOut modem autoconfigure type default stopbits 1 speed 115200 flowcontrol hardware line aux 0 line vty 0 4 ! no scheduler allocate end

The other side router's configure: kitty#show run Building configuration...

Current configuration: ! version 11.3 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname kitty ! ! username snoopy password 0 cisco memory-size iomem 20 no ip domain-lookup ! ! ! ! interface BRI0/0 no ip address shutdown ! interface Ethernet0/0 ip address 172.16.20.1 255.255.255.0 ! interface Serial0/0 no ip address no ip mroute-cache shutdown ! interface Serial0/1 physical-layer async ip unnumbered Ethernet0/0 encapsulation ppp dialer in-band dialer idle-timeout 300 dialer map ip 172.16.10.1 name snoopy broadcast dialer-group 1 async dynamic routing async mode dedicated peer default ip address 172.16.10.1 ppp authentication pap ! router rip network 172.16.0.0 ! ip classless ip route 0.0.0.0 0.0.0.0 172.16.10.1 ip route 172.16.10.1 255.255.255.255 Serial0/1 ! access-list 101 permit ip any any dialer-list 1 protocol ip list 101 ! ! line con 0 exec-timeout 0 0 line 2 modem InOut modem autoconfigure type default stopbits 1 speed 115200 flowcontrol hardware line aux 0 line vty 0 4 login ! no scheduler allocate end

Reply to
asummit

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