CCNA 200-125: PPP CHAP
username R2 password derp ! interface Serial0/0/0 ip address 192.168.0.1 255.255.255.252 encapsulation ppp ppp authentication chap username R1 password derp ! interface Serial0/0/0 ip address 192.168.0.2 255.255.255.252 encapsulation ppp ppp authentication chap Derpy: https://givralix.deviantart.com/art/Derpy-Hooves-429911899
username R2 password derp ! interface Serial0/0/0 ip address 192.168.0.1 255.255.255.252 encapsulation ppp ppp authentication chap username R1 password derp ! interface Serial0/0/0 ip address 192.168.0.2 255.255.255.252 encapsulation ppp ppp authentication chap Derpy: https://givralix.deviantart.com/art/Derpy-Hooves-429911899