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EIGRP over Frame-Relay with Multipoint interface

Written by Rene Molenaar on . Posted in EIGRP

Scenario:

A couple of stooge network engineers are trying to configure EIGRP over the frame-relay network. They read all about frame-relay, EIGRP and split-horizon and decided it sounded like a good idea to use sub-interface. Unfortunately things are not working as they should. Do you think you can help them out?

Goal:

  • All IP addresses have been preconfigured for you as specified in the topology picture except for router Moe.
  • Every router has a loopback0 interface:
    Moe: 1.1.1.1 /24
    Curly: 2.2.2.2 /24
    Larry: 3.3.3.3 /24
  • You are not allowed to make any changes to the frame-relay configurations.
  • Configure a multipoint sub-interface on router Moe.
  • Configure EIGRP AS 123 on all routers and advertise the loopback interfaces.
  • Ensure router Curly and Larry can see each other's loopback interfaces. Test this by sending a ping that is sourced from the loopback0 interfaces and destined for the other loopback0 interface.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

EIGRP Frame-Relay Network Topology

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Comments (9)

  • avatar
    xytek
    2011-09-05 10:17:50

    Umm last step.. where is router "joe and jack"?

  • avatar
    ReneMolenaar
    2011-09-06 12:38:55

    Hi Terrelle,

    Just fixed the article...too much copy/paste action ;D

    Rene

  • avatar
    willtech10577
    2011-09-18 19:58:02

    Hey Rene will you be posting up youtube video solutions for these labs -- I noticed some of the EIGRP do not have them posted.

    Thanks,
    WZ

  • avatar
    ReneMolenaar
    2011-09-19 17:23:37

    Hi William,

    I will once i'm finished with some more labs...I'm on a labbing spree and once i'm done I'll start recording the videos.

    Let me give you one hint for this one...check what the difference is between a physical multipoint interface and a sub-interface multipoint and how it affects EIGRP.

    Rene

  • avatar
    angipp01
    2011-11-23 15:11:59

    http://www.youtube.com/watch?v=NtPNnS6x6NI&feature=related

  • avatar
    akbar.khb
    2012-05-14 15:43:39

    Hi Rene
    First of all, I'd like to thank to you for every thing that you are doing here.

    What can we do in this scenario to ping loopbacks without need for specifying the source of ping packets?

    Good Luck.
    Akbar

  • avatar
    ReneMolenaar
    2012-05-16 09:11:51

    Hi Akbar,

    If you don't specify the source IP address for the ping then it will be sourced from the IP address on the interface. If this doesn't work you'll have to create some additional frame-relay map statements so the routers know how to reach each others IP addresses.

    Rene

  • avatar
    akbar.khb
    2012-05-16 15:40:48

    Yes, by adding a FR map statement on spoke routers, it works...
    Thank you Rene :)

    Akbar

  • avatar
    rak
    2012-05-17 20:03:03

    Keep up the good work. It great to do read the book ( master ccnp route) and do the labs.

    Thanks
    Rakesh