R2#sh run int s 1/0.1
Building configuration...

Current configuration : 172 bytes
!
interface Serial1/0.1 multipoint
 ip address 208.28.1.3 255.255.255.248
 backup interface Dialer0
 frame-relay map ip 208.28.1.1 203
 frame-relay interface-dlci 203
end

R2#