Here Router 1 is the hub and routers 2,3,4 are spokes..
CONFIGURATION:
ROUTER 1:
interface Serial2/0
ip address 10.0.0.1 255.255.255.0
encapsulation frame-relay
frame-relay map ip 10.0.0.2 100
frame-relay map ip 10.0.0.5 200
frame-relay map ip 10.0.0.4 300
ROUTER 2:
interface Serial2/0
ip address 10.0.0.2 255.255.255.0
encapsulation frame-relay
frame-relay map ip 10.0.0.1 100
ROUTER 3:
interface Serial2/0
ip address 10.0.0.5 255.255.255.0
encapsulation frame-relay
frame-relay map ip 10.0.0.1 200
ROUTER 4:
interface Serial2/0
ip address 10.0.0.4 255.255.255.0
encapsulation frame-relay
frame-relay map ip 10.0.0.1 300
FRAME-RELAY SWITCH:
interface configuration
interface--DLCI------NAME
serial0----100-------1-2
serial0----200-------1-3
serial0----300-------1-4
serial1----100-------2-1
serial2----200-------3-1
seiral3----300-------4-1
Frame relay
From port------------Sublink
serial0---------------1-2
serial0---------------1-3
serial0---------------1-4
By configuring so,we can reach only from Hub to spokes , to get a reach-ability between spoke to spoke we need to add static mapping as follows
ROUTER 2:
frame-relay map ip 10.0.0.5 100
ROUTER 3:
frame-relay map ip 10.0.0.2 200
Add the above commands under R2 and R3 then R2 can reach R3 which is spoke to spoke communication
