OSPF Over Frame-Relay: Point-to-Multipoint Non-Broadcast

Written by Rene Molenaar on 24 July 2010. Posted in OSPF

Scenario:

As the senior network engineer for a Dutch fishing company you are responsible for connecting all the different branch offices to the main network. The WAN technology you are using is Frame Relay, and you need to run OSPF over this WAN connection. It's impossible to broadcast on this WAN connection.

Goal:

The frame-relay switch has been preconfigured for you, as you can see in the topology picture the following PVC's has been configured:

Router Barracuda to Salmon:
Barracuda: DLCI 102
Salmon: DLCI 201

Router Barracuda to Herring:
Barracuda: DLCI 103
Herring: DLCI 301
Router Barracuda is the "Hub" router and the other 2 routers are the "Spoke" routers.
Do not change any configuration on the Frame-Relay switch.
Configure the following IP addresses:
Router Barracuda:
S0/0: 192.168.123.1 /24
L0: 1.1.1.1 /24

Router Salmon:
S0/0: 192.168.123.2 /24
L0: 2.2.2.2 /24

Router Herring:
S0/0: 192.168.123.3 /24
L0: 3.3.3.3 /24
Configure all serial interfaces for encapsulation Frame-Relay.
Disable Frame-relay inverse arp on all serial interfaces.
Configure the correct frame-relay map statements on all routers and make sure you can ping every IP address. You are not allowed to use the "broadcast" command.
Configure the OSPF network type to "point-to-multipoint non-broadcast" on all serial interfaces.
Configure OSPF on all 3 routers, make sure you have full connectivity. All IP addresses including the loopbacks should be reachable.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

Video Solution:

You need to register to download the GNS3 Topology File. (Registration is Free!)

Related Articles: OSPF Single Area
Frame-Relay Basics
OSPF Intermediate
OSPF Virtual Link and Summarization
OSPF over Frame-Relay

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Comments (7)

mq-defiler
2011-04-05 12:01:01

I'am sorry, but "OSPFoverFRPtoMPNB-FinalConfigs" not final.
And preconfigure configuration without configure DLCI.. as wrote in goal.

greatidea
2011-07-15 13:01:30

Hi Rene,

The frame-relay map is not showing anything. i've configured the dlci's and map statements, but nothing in the fr map. I tried to see the final config, but its even not there.

ReneMolenaar
2011-07-15 13:08:58

By default Inverse ARP is enabled which will do the frame relay mapping automatically. By default it will also send broadcast traffic through the PVC.

You don't see anything when you try "show frame-relay map" ? What about "show frame-relay pvc" does it show active?

dmillbank
2011-12-21 00:57:50

Router Barracuda to Herring:
Barracuda: DLCI 103
Salmon: DLCI 301

should be

Router Barracuda to Herring:
Barracuda: DLCI 103
Herring: DLCI 301

Thank you for all this great information. I've been doing labs the last 5 days and I follow your Master ROUTE book which is easily the best book on CCNP Route that I have come across!!

ReneMolenaar
2011-12-21 20:11:04

Hi Daniel,

Thanks for this comment Just edited the lab...made a small mistake with too much copy/pasting ;D

Good that you like the book any plans for the exam yet? If you read the books and do all the labs yourself you'll get there!

Rene

dmillbank
2011-12-21 20:53:39

I had my exam planned for Jan 16th, but not with reading your book I might take a shot at it earlier (I'm halfway through).

What I've always valued are people that can help me provide 'lightbulb' moments... the moments of clarity where you say to yourself 'Ah, now I get it!'. Your book is like a constant spotlight. You've assembled all the lightbulb moments into one amazing resource!

Thanks again. Now I have to get back to studying!

oaljohi
2012-02-11 21:46:09

I am confuse during I apply this lab without reading and listening your video.
But after reading carefully I got it

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