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Coco Lugo
07-10-2009, 09:21 AM
For some reason my output from the "debug ppp authentication" command looks different than what shows in the book on p793-794. Here it is:

Serial0/0 LCP: State is Open
Serial0/0 PPP: Phase is AUTHENTICATING
Serial0/0 IPCP: O CONFREQ [Closed] id 1 len 10
Serial0/0 IPCP: I CONFACK [Closed] id 1 len 10
Serial0/0 IPCP: O CONFREQ [Closed] id 1 len 10
Serial0/0 IPCP: I CONFREQ [Closed] id 1 len 10
Serial0/0 IPCP: O CONFACK [Closed] id 1 len 10
Serial0/0 IPCP: I CONFACK [REQsent] id 1 len 10
Serial0/0 IPCP: I CONFREQ [REQsent] id 1 len 10
Serial0/0 IPCP: O CONFACK [REQsent] id 1 len 10
Serial0/0 PPP: Phase is FORWARDING, Attempting Forward
Serial0/0 Phase is ESTABLISHING, Finish LCP
Serial0/0 Phase is UP


I used the command "ppp authentication chap pap" on both routers, everything else is working fine. I'm just confused why the output in the book is in the form of:

Se0/0 CHAP: 0 CHALLENGE id 219 len 27 from "Pod1R1"

and my output doesn't mention CHAP, CHALLENGE, or the name of the router(s).

I'm using Packet Tracer 5.1, and each router is running IOS 12.2 if that matters. Anyone have any ideas?

Thanks!

Jyothi
08-02-2010, 09:47 PM
Hi,
did anyone tried this...hands-on lab 14.3, CHAP?
i have set my console, telnet passwords as same on both the routers,
configured ppp auth on both sides , as instructed in the book.
I am able to telnet from A to B and vice versa.
but could not see CHAP : CHALLENGE messages upon debug is On.
instead, i am getting
RouterA#debug ppp auth
PPP authentication debugging is on

RouterA#telnet 10.0.1.2
Trying 10.0.1.2 ...Open

RouterB>en
% Error in authentication.

what might be wrong? i am using packet tracer 5.2.

But I observed some the below messages on RouterB, when the serial interface (of 2nd router)state is changed (RouterA-10.0.1.1 is reloaded)

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to down
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up
Serial0/0/0 IPCP: O CONFREQ [Closed] id 1 len 10
Serial0/0/0 IPCP: I CONFACK [Closed] id 1 len 10
Serial0/0/0 IPCP: O CONFREQ [Closed] id 1 len 10
Serial0/0/0 IPCP: I CONFREQ [Closed] id 1 len 10
Serial0/0/0 IPCP: O CONFACK [Closed] id 1 len 10
Serial0/0/0 IPCP: I CONFACK [REQsent] id 1 len 10
Serial0/0/0 IPCP: I CONFREQ [REQsent] id 1 len 10
Serial0/0/0 IPCP: O CONFACK [REQsent] id 1 len 10
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up



Please...respond
Thanks,
Jyothi