Back-to-Back FR

PE1
frame-relay switching
int s2/0
encap frame-relay
no frame-relay inverse-arp
no keepalive
ip add 1.1.1.1 255.255.255.0
frame-relay map ip 1.1.1.2 100 broadcast
no shut

ASBR1
frame-relay switching
int s2/2
encap frame-relay
no frame-relay inverse-arp
no keepalive
ip add 1.1.1.2 255.255.255.0
frame-relay map ip 1.1.1.1100 broadcast
no shut

The Point is for back to back FR
1) we must disable keepalives , else PVC shows DELETED
2) we must use same DLCI ( in our e.g 100) , else it doesnt work.