Frame Relay Multipoint Subinterface


Most toons from the fairy tale forest have switched their career to become network engineers. Cinderella has been trying to reach Hansel and Gretel through the frame relay network but hasn’t had any luck. Think you can take this dance?


  • Configure all routers to use frame-relay encapsulation.
  • Configure the IP addresses as specified in the topology picture on point-to-multipoint subinterfaces.
  • Ensure you can ping both routers from router Cinderella.
  • Disable frame relay inverse ARP and make sure to configure the correct frame relay mappings.
  • Ensure the frame relay network has broadcast capabilities.
  • Ensure you can still ping both routers from router Cinderella.

It took me 1000s of hours reading books and doing labs, making mistakes over and over again until I mastered all the protocols for CCNA.

Would you like to be a master of networking too? In a short time without having to read 900 page books or google the answers to your questions and browsing through forums?

I collected all my knowledge and created a single ebook for you that has everything you need to know to become a master of CCNA.

You will learn all the secrets about frame-relay, PVCs, NBMA, sub-interfaces and more.

Does this sound interesting to you? Take a look here and let me show you how to Master CCNA!




Frame Relay Multipoint Subinterface

Video Solution:

Configuration Files

You need to register to download the GNS3 topology file. (Registration is free!)

Once you are logged in you will find the configuration files right here.

Opt In Image
Do you want your CCNA or CCNP Certificate?

The How to Master series helps you to understand complex topics like spanning-tree, VLANs, trunks, OSPF, EIGRP, BGP and more.

Written by René Molenaar - CCIE #41726

You May Also Like

About the Author: Rene Molenaar

René - CCIE #41726 is the creator of where he shares CCNA, CCNP and CCIE R&S labs. He also blogs about networking on


  1. Hi Trevor,

    Not yet but I have some other frame-relay labs that are 90% the same as this one (with videos). I’ll create the video soon. You can also drop your questions here.

  2. Can anyone please tell me how to configure a Cisco Router as a Frame-Relay Switch for Multipoint Subinterface.

  3. Hey I M not able to ping any routers from router Cinderella.i just copy paste the Download this file ( [Frame Relay Multipoint Subinterfaces] 2 Kb

    in the GNS but not able..

    please Help

  4. Rene,

    I’m not sure if the lab is wrong, or the video is wrong. Doesn’t a point-to-multipoint lab imply that one side has to be point-to-point? However, the video shows all sub interfaces being configured as mult-point – so that the network is multipoint-to-multipoint.

    I’m confused, and having trouble getting point to multipoint working, which is why I watched the video for the solution.



    1. Its named a point to multipoint because it is hub and spoke topology. So the main hub Cinderella is the point, who is connected to multiple points.. as she has more than 1 dlci connected to her. For the others, unfortunately, you wouldn’t be able to set them up as point to points to cinderella because that would require Cinderella to have 2 separate serial connections and a dedicated block of IP’s.

      1. Jean, this is not entirely true. Spokes can be configured as frame relay P2P. The type of frame relay interface is just a way of configuring FR. At the end of the day, the encapsulated frames look the same on the wire. You could configure the spokes with P2P subinterfaces and it would work OK. Multipoint links require explicit DLCI to IP mappings (L2/L3 resolution) unless InARP is in use.

  5. Hi.

    I think there is a mistake. On Cindarella you add the second frame-relay command on the first interface s0/0.201. Look from 4:37.

  6. Hello Rene, how are you?
    In your video, you included the command “frame-relay map ip 103 broadcast” in s0/0.102 subinterface. Shouldn’t you include it on s0/0.103 subinterface?

    Thank you.

Comments are closed.