The objective of this lab exercise is for you to configure PAP fallback. This is not covered in earlier labs or in the CCNA syllabus; however, it might come up in the exam!
PAP fallback is a useful feature if your CHAP authentication fails. Rather than watch a video solution, I have provided show runs and test commands where appropriate.
This lab is suitable for both ICND2 and CCNA certification exam preparation.
This lab has a difficulty rating of 7/10.
When you are ready for your certification exam, you should complete this lab in no more than 15 minutes.
Please use the following topology to complete this lab exercise:
Configure the topology above. Test by pinging from RouterA to RouterB.
Configure a CHAP with PAP fallback on both routers. Ensure that the encapsulation is set to PPP on both routers.
Check your configurations with show commands (just show run in this case).
Show Runs RouterA hostname RA ! username RB password 0 cisco archive log config hidekeys ! interface Serial0/0 ip address 10.0.0.1 255.255.255.252 encapsulation ppp clock rate 2000000 ppp authentication chap pap ! RouterB hostname RB ! username RA password 0 cisco archive log config hidekeys ! interface Serial0/0 ip address 10.0.0.2 255.255.255.252 encapsulation ppp clock rate 2000000 ppp authentication chap pap