Frame-relay router configuration in Frame-relay multipoint topology

[totardo.tobing11]

Hi Masters,

Forgive me, I am a self learner. Now studying basic frame relay multipoint.

I have done configure hub (R1) and spoke routers (R2 and R3) but I am confuse of how to configure the frame relay router (R4) in this hub and spoke situation. Can you tell me how can I configure that Frame relay router (R4) by using this topology please.

Many thanks!

[Bilal Nawaz]

Here is an example to get R1 talking to R2 via R4

R4#show running-config
Building configuration...
<output omitted>
!
hostname R4
!
<output omitted>
!
frame-relay switching
!
interface Serial0/0
 no ip address
 encapsulation frame-relay
 clockrate 64000
 frame-relay intf-type dce
 frame-relay route 122 interface Serial0/1 221
!
interface Serial0/1
 no ip address
 encapsulation frame-relay
 clockrate 64000
 frame-relay intf-type dce
 frame-relay route 221 interface Serial0/0 122

Validation command: show frame-relay route

Parameters such as clock rate can be changed.

Hope this helps.

[totardo.tobing11]

R1 interface configuration is this:

R1(config)#interface Serial0/0 
R1(config-if)#encapsulation frame-relay
R1(config-if)#interface serial0/0.123 multipoint
R1(config-if)#ip address 10.54.123.1 255.255.255.248
R1(config-if)#frame map ip 10.54.123.2 122 broadcast
R1(config-if)#frame map ip 10.54.123.3 123 broadcast
R1(config-subif)#end

Is there any missing information in the topology?

[Bilal Nawaz]

not that I can think of, you need to put an additional route in on your frame-relay switch which is R4 for the other mapping.