In this series of “Labbing it up” , I present to you the troubles that have haunted me the beter part of this morning.
I was trying to configure a text book example of NBMA Frame Relay cloud with only 3 routers.
Like so :

The configuration I was trying to deploy involved mapping my 2 dlci’s (of my below routers) to their ip’s on the top routers serial interface.
int s0/0 (on r14)
ip address 10.1.14.1
encapsulation frame-relay
frame-relay interface-dlci 101
frame-relay map ip 10.1.16.1 116 broadcast
frame-relay map ip 10.1.15.1 115 broadcast
For some reason , this didnt work. I started to debug and when i did a “debug frame-relay packet” and performed a ping , I quickly noticed i didnt even have ip reachability. Seems that the map ip command doesnt like gns3 FR simulators. After removing these commands, I got back full reachabilty and my dlci were found automaticly (verified with show frame-relay pvc).
The main reason that I lost so much time today was the fact that I had this setup working in the morning using sub interfaces (p-t-mp) so i excluded my FR simulator too quickly as a possible source of problems.
Now, it could be that i’m totally wrong about this, so if you something I quite possibly don’t, please drop a line.
Above all, I learned one thing today : review CCNA
