AR1

undo t t
sy
sysn AR1
int g0/0/0
ip add 192.168.10.2 24
int g0/0/1
ip add 192.168.16.2 24
q

AR2

undo t t
sy
sysn AR2
int g0/0/1
ip add 192.168.16.1 24
int g0/0/2
ip add 192.168.26.1 24
q

AR3

undo t t
sy
sysn AR3
int g0/0/0
ip add 192.168.20.2 24
int g0/0/2
ip add 192.168.26.2 24
q

AR1

rip 1
version 2
network 192.168.10.0
net 192.168.16.0
undo sum
q

AR2

rip
version 2
network 192.168.16.0
net 192.168.26.0
undo sum
q

AR3

rip
Version 2
network 192.168.26.0
net 192.168.20.0
undo sum
q