Back to back Frame Relay
Without "no keepalive", it won't work.
 
Router1:
interface Serial0 
 no ip address 
 encapsulation frame-relay 
 no keepalive 
!--- This command disables LMI processing.
 clock rate 64000 
! 
interface Serial0.1 point-to-point 
!--- A point-to-point subinterface has been created.
 ip address 172.16.120.105 255.255.255.0 
 frame-relay interface-dlci 101 
!--- DLCI 101 has been assigned to this interface
!
 
 
Router2:
interface Serial0 
 no ip address 
 encapsulation frame-relay 
 no keepalive 
!--- This command disables LMI processing.
! 
interface Serial0.1
point-to-point 
!--- A point-to-point subinterface has been created.
 ip address 172.16.120.120 255.255.255.0 
 frame-relay interface-dlci 101 
!--- DLCI 101 has been assigned to this interface
!