PPP Configuration
=================
PPP with PAP authentication:
in this configuration R1 is PAP Server and R2 is PAP client
R1(config)#int s1/0
R1(config-if)ip address 1.1.1.1 255.255.255.0
R1(config-if)#encapsulation ppp
R1(config-if)#ppp authentication pap
R1(config-if)#exit
R1(config)#username R2 password cisco
R2(config)#int s1/0
R2(config-if)ip address 1.1.1.2 255.255.255.0
R2(config-if)#encapsulation ppp
R2(config-if)#ppp pap sent-username R2 password cisco
=================================
PPP with CHAP authentication:
in this configuration R1 is CHAP Client and R2 is CHAP Server
R1#configure terminal
R1(config)#interface serial 1/0
R1(config-if)ip address 1.1.1.1 255.255.255.0
R1(config-if)#encapsulation ppp
R1(config-if)#ppp chap hostname R1
R1(config-if)#ppp chap password cisco
R2#configure terminal
R2(config)#username R1 password cisco
R2(config)#interface serial 1/0
R2(config-if)ip address 1.1.1.2 255.255.255.0
R2(config-if)#encapsulation ppp
R2(config-if)#ppp authentication chap
=================================
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