Router_B(config)#ip local pool client1-pool 200.200.200.2
Router_B(config)#interface virtual-template 1
Router_B(config-if)#mtu 1454
Router_B(config-if)#ip unnumbered ethernet 0
Router_B(config-if)#peer default ip address pool client1-pool
Router_B(config-if)#ppp authentication chap
Router_B(config-if)#exit