Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int s0/0/0
Router(config-if)#en
Router(config-if)#encapsulation ?
frame-relay Frame Relay networks
hdlc Serial HDLC
synchronous
ppp
Point-to-Point protocol
Router(config-if)#encapsulation hdlc
Router(config-if)#
Router#sh interfaces
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#en
Router(config)#int s0/0/1
Router(config-if)#en
Router(config-if)#encapsulation ?
frame-relay Frame Relay networks
hdlc Serial HDLC
synchronous
ppp
Point-to-Point protocol
Router(config-if)#encapsulation ppp
Router(config-if)#
Router#sh interfaces