Multicast Tunneling


It’s your first day in the army working as a networking professional. You are sent to a small international outpost to look after the network. It’s a rather old network but they need you to install Multicast so they can stream audio in a efficient matter over the network. There is one problem though…there’s one router that is so old that it doesn’t support Multicast, let’s check it out.


  • All IP addresses have been preconfigured for you.
  • Configure OSPF on all routers, achieve full connectivity.
  • You are allowed to configure dense-mode Multicast on all routers EXCEPT router Charlie.
  • Configure router Echo to join the following multicast group:
  • Start a ping from router Alpha to the multicast group address to generate traffic.
  • Make sure router Echo can receive the multicast stream without configuring multicast on router Charlie.




Multicast Tunneling Network Topology

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. Rene,

    FYI, none of the routers are preconfigured with IP addresses in this lab.

    I am going thru your labs to prepare for the ROUTE & TSHOOT exams, along with other resources. I really am thankful you are doing this. Really helps my preparation for the exams.

    Thanks again and keep up the great work. All you endeavors.

  2. Rene, i know you are such perfect author, but, when recording videos no one is able to see the commands. we only listen your voice
    so please make your videos visible for us.
    i bought a ccnp route from you and planning ccnp t-shoot and switching from you again. but labs are so poor to see them.
    thank you
    regards said

Comments are closed.