PPP configuration CCNA lab

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Lab 21

PPP Encapsulation — CHAP & PAP Authentication

Select CHAP or PAP mode, then configure R1 first

Auth Mode: CHAP — password never sent in plaintext

R1 — DCE Side

Gi0/0 → 192.168.1.1/24 no shutdown

Se0/0/0 → 10.0.0.1/30 no shutdown

clock rate 64000 on Se0/0/0

encapsulation ppp on Se0/0/0

ppp authentication chap on Se0/0/0

username R2 password cisco

Static route → 192.168.2.0/24 via 10.0.0.2

R2 — DTE Side

Gi0/0 → 192.168.2.1/24 no shutdown

Se0/0/0 → 10.0.0.2/30 no shutdown

encapsulation ppp on Se0/0/0

ppp authentication chap on Se0/0/0

username R1 password cisco

Static route → 192.168.1.0/24 via 10.0.0.1

show ip route — verify both routes

Quick Reference

encapsulation ppp
ppp authentication chap
username R2 password cisco
clock rate 64000
ip route > > >
show ip route
show int Se0/0/0
debug ppp auth

R1 — DCE

R2 — DTE

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