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Confnak from dial-up provider during LCP negociation

Hi, we are using a cisco router 891 with an internal modem v.92 port. We are unable to do a dial-up connection with our usual dial-up provider. We are getting 2 confnak from him and then the event timeout occurs. Do you guys see anything wrong in our config?

Here is the debug information, the config will follow:

Jun 14 13:52:08: CHAT1: Attempting async line dialer script

Jun 14 13:52:08: CHAT1: Dialing using Modem script: dialout & System script: none

Jun 14 13:52:08: CHAT1: process started

Jun 14 13:52:08: CHAT1: Asserting DTR

Jun 14 13:52:08: CHAT1: Chat script dialout started

Jun 14 13:52:08: CHAT1: Sending string: ATDT \T<94186941429>

Jun 14 13:52:08: CHAT1: Expecting string: CONNECT

Jun 14 13:52:08: CHAT1: Input mismatch expecting: CONNECT :: ATDT 94186941429\015\015\012

Jun 14 13:52:29: CHAT1: Input match for: CONNECT:: CONNECT

Jun 14 13:52:29: CHAT1: Completed match for expect: CONNECT

Jun 14 13:52:29: CHAT1: Chat script dialout finished, status = Success

Jun 14 13:52:31: %LINK-3-UPDOWN: Interface Async1, changed state to up

Jun 14 13:52:31: As1 PPP: Sending cstate UP notification

Jun 14 13:52:31: As1 PPP: Processing CstateUp message

Jun 14 13:52:31: PPP: Alloc Context [85D30468]

Jun 14 13:52:31: ppp235 PPP: Phase is ESTABLISHING

Jun 14 13:52:31: As1 PPP: Using dialer call direction

Jun 14 13:52:31: As1 PPP: Treating connection as a callout

Jun 14 13:52:31: As1 PPP: Session handle[91000027] Session id[235]

Jun 14 13:52:31: As1 LCP: Event[OPEN] State[Initial to Starting]

Jun 14 13:52:31: As1 PPP: No remote authentication for call-out

Jun 14 13:52:31: As1 LCP: O CONFREQ [Starting] id 1 len 20

Jun 14 13:52:31: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:31: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:31: As1 LCP:    PFC (0x0702)

Jun 14 13:52:31: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:31: As1 LCP: Event[UP] State[Starting to REQsent]

Jun 14 13:52:33: As1 LCP: O CONFREQ [REQsent] id 2 len 20

Jun 14 13:52:33: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:33: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:33: As1 LCP:    PFC (0x0702)

Jun 14 13:52:33: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:33: As1 LCP: Event[Timeout+] State[REQsent to REQsent]

Jun 14 13:52:35: As1 LCP: O CONFREQ [REQsent] id 3 len 20

Jun 14 13:52:35: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:35: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:35: As1 LCP:    PFC (0x0702)

Jun 14 13:52:35: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:35: As1 LCP: Event[Timeout+] State[REQsent to REQsent]

Jun 14 13:52:37: As1 LCP: O CONFREQ [REQsent] id 4 len 20

Jun 14 13:52:37: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:37: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:37: As1 LCP:    PFC (0x0702)

Jun 14 13:52:37: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:37: As1 LCP: Event[Timeout+] State[REQsent to REQsent]

Jun 14 13:52:39: As1 LCP: O CONFREQ [REQsent] id 5 len 20

Jun 14 13:52:39: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:39: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:39: As1 LCP:    PFC (0x0702)

Jun 14 13:52:39: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:39: As1 LCP: Event[Timeout+] State[REQsent to REQsent]

Jun 14 13:52:41: As1 LCP: O CONFREQ [REQsent] id 6 len 20

Jun 14 13:52:41: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:41: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:41: As1 LCP:    PFC (0x0702)

Jun 14 13:52:41: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:41: As1 LCP: Event[Timeout+] State[REQsent to REQsent]

Jun 14 13:52:41: As1 LCP: I CONFREQ [REQsent] id 6 len 20

Jun 14 13:52:41: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:41: As1 LCP:    MagicNumber 0x14667351 (0x050614667351)

Jun 14 13:52:41: As1 LCP:    PFC (0x0702)

Jun 14 13:52:41: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:41: As1 LCP: Loopback seen, Magic number not Acked

Jun 14 13:52:41: As1 LCP: O CONFNAK [REQsent] id 6 len 10

Jun 14 13:52:41: As1 LCP:    MagicNumber 0x14669AB0 (0x050614669AB0)

Jun 14 13:52:41: As1 LCP: Event[Receive ConfReq-] State[REQsent to REQsent]

Jun 14 13:52:41: As1 LCP: I CONFNAK [REQsent] id 6 len 10

Jun 14 13:52:41: As1 LCP:    MagicNumber 0x14669AB0 (0x050614669AB0)

Jun 14 13:52:41: As1 PPP: Line appears to be looped back

Jun 14 13:52:44: As1 LCP: O CONFREQ [REQsent] id 7 len 20

Jun 14 13:52:44: As1 LCP:    ACCM 0x000A0000 (0x0206000A0000)

Jun 14 13:52:44: As1 LCP:    MagicNumber 0x14669AB5 (0x050614669AB5)

Jun 14 13:52:44: As1 LCP:    PFC (0x0702)

Jun 14 13:52:44: As1 LCP:    ACFC (0x0802)

Jun 14 13:52:44: As1 LCP: Event[Timeout+] State[REQsent to REQsent]

Jun 14 13:52:44: %LINK-5-CHANGED: Interface Async1, changed state to reset

Jun 14 13:52:44: As1 PPP: Sending cstate DOWN notification

Jun 14 13:52:44: As1 PPP: Processing CstateDown message

Jun 14 13:52:44: As1 PPP DISC: Lower Layer disconnected

Jun 14 13:52:44: As1 PPP: Sending Acct Event[Down] id[4E7]

Jun 14 13:52:44: PPP: NET STOP send to AAA.

Jun 14 13:52:44: As1 LCP: O TERMREQ [REQsent] id 8 len 4

Jun 14 13:52:44: As1 LCP: Event[CLOSE] State[REQsent to Closing]

Jun 14 13:52:44: As1 PPP: Phase is TERMINATING

Jun 14 13:52:44: As1 LCP: Event[DOWN] State[Closing to Initial]

Jun 14 13:52:44: As1 PPP: Phase is DOWN

Jun 14 13:52:49: %LINK-3-UPDOWN: Interface Async1, changed state to down

Jun 14 13:52:49: As1 PPP: Sending cstate DOWN notification

Jun 14 13:52:49: As1 PPP: Processing CstateDown message

Here is the config of the 891:

interface Async1

ip address negotiated

encapsulation ppp

dialer in-band

dialer idle-timeout 60

dialer wait-for-carrier-time 10

dialer string XXXXXXXXXXX modem-script dialout

dialer watch-group 8

async dynamic address

async dynamic routing

async mode dedicated

no keepalive

ppp authentication pap callin

ppp pap sent-username XXXXXXXXXX password 7 XXXXXXXXXXXX

end


Modemcap values for my_modem

Factory Defaults (FD):  &F

Autoanswer (AA):  S0=0

Carrier detect (CD):  &C1

Drop with DTR (DTR):  &D2

Hardware Flowcontrol (HFL):  [not set]

Lock DTE speed (SPD):  [not set]

DTE locking speed (DTE):  [not set]

Best Error Control (BER):  [not set]

Best Compression (BCP):  [not set]

No Error Control (NER):  [not set]

No Compression (NCP):  [not set]

No Echo (NEC):  E0

No Result Codes (NRS):  Q1

Software Flowcontrol (SFL):  [not set]

Caller ID (CID):  [not set]

On-hook (ONH):  [not set]

Off-hook (OFH):  [not set]

Miscellaneous (MSC):  [not set]

Template entry (TPL):  [not set]


line 1

exec-timeout 0 0

modem InOut

modem autoconfigure type my_modem

stopbits 1

speed 115200

flowcontrol hardware


Hostname(config-if)# do sh debug

PPP:

  PPP authentication debugging is on

  PPP protocol negotiation debugging is on

Chat Scripts:

  Chat scripts activity debugging is on for line number 1


Hostname(config-if)# do sh debug

PPP:

  PPP authentication debugging is on

  PPP protocol negotiation debugging is on

Chat Scripts:

  Chat scripts activity debugging is on for line number 1

Hostname(config-if)#do sh line 1

   Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int

*     1 TTY              - inout     -    -    -      0     148     0/0       -

Line 1, Location: "", Type: ""

Length: 24 lines, Width: 80 columns

Status: Dialing out, Ready, Active, No Exit Banner, Modem Detected

  CTS Raised

Capabilities: Hardware Flowcontrol In, Hardware Flowcontrol Out

  Modem Callout, Modem RI is CD, Line is permanent async interface

  Modem Autoconfigure, Integrated Modem

Modem state: Ready

Modem hardware state: CTS* noDSR  DTR RTS, Modem Configured

Special Chars: Escape  Hold  Stop  Start  Disconnect  Activation

                ^^x    none   -     -       none        

Timeouts:      Idle EXEC    Idle Session   Modem Answer  Session   Dispatch

                never         never                        none     not set

                            Idle Session Disconnect Warning

                              never

                            Login-sequence User Response

                             00:00:30

                            Autoselect Initial Wait

                              not set

Modem type is my_modem.

Session limit is not set.

Time since activation: never

Editing is enabled.

History is enabled, history size is 20.

DNS resolution in show commands is enabled

Full user help is disabled

Allowed input transports are none.

Allowed output transports are pad telnet rlogin ssh.

Preferred transport is telnet.

Shell: enabled

Shell trace: off

No output characters are padded

No special data dispatching characters

Thx for help

John

1 REPLY 1
Hall of Fame Master

Re: Confnak from dial-up provider during LCP negociation

There is some problem with the modem setting.

It did not really connect, it is receiving back his own input.

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