RtA
-------------------------------
en
conf t
host RtA
no ip do lo
lin c 0
no exec-t
logg s
exit

int s0/0
en ppp
ppp pap sent benet pass 7 000000
ip add 1.1.1.1 255.255.255.0
do debug ppp negotiation
no sh

-------------------------------
RtB
-------------------------------
en
conf t
host RtB
no ip do lo
lin c 0
no exec-t
logg s
exit

username benet pass 7 000000
int s0/0
clock rate 4800
en ppp
ppp authe pap chap
ip add 1.1.1.2 255.255.255.0
no sh

int s0/1
en ppp
ppp authe pap
ppp pap sent test pass 7 000000
ip add 2.2.2.1 255.255.255.0
do debug ppp negotiation
no sh

 

int s0/2
clock rate 4800
en ppp
ppp authe chap
ppp chap host RtB
ppp chap pass 7 000000
peer default ip add 3.3.3.2
ip add 3.3.3.1 255.255.255.0
no sh

---------------------------------
RtC
---------------------------------
en
conf t
host RtC
no ip do lo
lin c 0
no exec-t
logg s
exit

username test pass 7 000000
int s0/1
en ppp
ppp authe pap
ppp pap sent benet pass 7 000000
ip add 2.2.2.2 255.255.255.0
no sh

----------------------------------
RtD
----------------------------------
en
conf t
host RtD
no ip do lo
lin c 0
no exec-t
logg s
exit

username RtB pass 7 000000
int s0/2
en ppp
ppp authe chap
ppp chap host benet
ppp chap pass 7 000000
ip add negotiated
no sh