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"frame-relay map" between spokes

Posted on 2006-06-08
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Last Modified: 2010-04-17
With FR "Hub and Spoke" scenario, Can we have "frame-relay map" (my concern with static mapping ) command between two spokes ?

I knew that we should "frame-relay map" from each spoke to hub, and from hub to each spoke.
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Question by:zillah
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by:Don Johnston
ID: 16869559
No. You're only allowed to have one IP address - DLCI mapping.

What are you trying to accomplish?
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by:zillah
ID: 16871428
The requirment for the scenario that I have got is this :

1- Using only physical interface configure a Frame Relay hub-and-spoke network between R33 (S1/1 ip address 182.1.0.33), R44 (S0/0 ip address 182.1.0.44), and R55, with R55 as the Hub (S0/0 ip address 182.1.0.55)

2- Traffic form R33 destined for R44 should transit R55 and vice versa.

3- R33 DLCI 33, R44 DLCI 44, R55 DLCI 55

4- Do not use any dynamic layer 3 to layer 2 mapping over these frame Relay connections.

5- Do not send any redundant broadcast traffic form the spokes to the Hub.

part  of the configurations for both spokes R33 and R44 are :

R33 (spoke)
frame-relay map ip 182.1.0.44 33
frame-relay map ip 182.1.0.55 33 broadcast

R44(spoke)
frame-relay map ip 182.1.0.33 44
frame-relay map ip 182.1.0.55 44 broadcast

As you can see that from R33 (spoke) there is static frame relay map to R44 (spoke) and vice versa,,,,this is the reason for my thread in this forum.

((No. You're only allowed to have one IP address - DLCI mapping)).

And as you can see we have two ip mapping to the same DLCI in case R33 and R44!!!

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by:Don Johnston
ID: 16871764
Sorry. I misunderstood the question. I thought you were trying to map one IP address to two DLCI's.

So what's the question? How to accomplish the scenario?

I addition to what you have above, you could use a static route.

R33
ip route 10.44.44.0 255.255.255.0 182.1.0.55

R44
ip route 10..33.33.0 255.255.255.0 182.1.0.55
 
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by:zillah
ID: 16872240
((So what's the question? How to accomplish the scenario?))

Can I create (configure) frame-relay map from spoke to spoke ?
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by:Don Johnston
ID: 16872284
No. You don't have a PVC between the R33 and R44.

You can, however, move the packets from R33 to R44.
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by:zillah
ID: 16872971
((No. You don't have a PVC between the R33 and R44)).
Does that mean it is wrong to configure such map ? or it is not necessary ?
because this configuration that I have posted here, have been used by CCIE people
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Don Johnston earned 125 total points
ID: 16873800
>Does that mean it is wrong to configure such map ?

No. It's just another way of doing it.

>or it is not necessary ?

It's necessary if you don't have a static route.
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