AIS Router AI2524 - Manual (Page 365)

Chapter 13: AI2524 Frame Relay Configuration Steps
August 1997 Page 13-49
2524UM
In this case, 100 is the DLCI that can get to host 131.108.126.111.
The remote router must have this frame-relay map entry:
frame-relay map ip 131.108.126.200 101 broadcast
This entry allows the remote router to return a boot image (from the
network server) to the router booting over Frame Relay. Here, 101 is
a DLCI of the router being booted.