Establishing WAN Connectivity - Point-to-Multipoint Frame Relay Using Subinterfaces and EIGRP

Router R1
=======

Router>enable
Router#configure terminal
Router(config)#hostname R1
R1(config)#interface serial s0/0/0
R1(config-if)#no ip address
R1(config-if)#encapsulation frame-relay
R1(config-if)#no frame-relay inverse-arp eigrp 100
R1(config-if)#exit
R1(config)#interface serial 0/0/0.1 multipoint
R1(config-subif)#ip address 192.168.1.101 255.255.255.0
R1(config-subif)#no ip splithorizon eigrp 100
R1(config-subif)#frame-relay map ip 192.168.1.101 101
R1(config-subif)#frame-relay map ip 192.168.1.102 102 broadcast
R1(config-subif)#frame-relay map ip 192.168.1.103 103 broadcast
R1(config-subif)#exit
R1(config)#router eigrp 100
R1(config-router)#network 172.16.1.0 0.0.0.255
R1(config-router)#network 192.168.1.0
R1(config-router)#exit
R1(config)#exit
R1#copy running-config startup-config

Router R2
=======

Router>enable
Router#configure terminal
Router(config)#hostname R2
R2(config)#interface serial 0/0/0
R2(config-if)#encapsulation frame-relay
R2(config-if)#ip address 192.168.1.102 255.255.255.0
R2(config-if)#frame-relay map ip 192.168.1.102 102
R2(config-if)#frame-relay map ip 192.168.1.101 201 broadcast
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#router eigrp 100
R2(config-router)#network 172.17.2.0 0.0.0.255
R2(config-router)#network 192.168.1.0
R2(config-router)#exit
R2(config)#exit
R2#copy running-config startup-config

Router R3
=======

Router>enable
Router#configure terminal
Router(config)#hostname R3
R3(config)#interface serial 0/0/0
R3(config-if)#encapsulation frame-relay
R3(config-if)#ip address 192.168.1.103 103
R3(config-if)#frame-relay map ip 192.168.1.101 301 broadcast
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#router eigrp 100
R3(config-router)#network 172.18.3.0 0.0.0.255
R3(config-router)#network 192.168.1.0
R3(config-router)#exit
R3(config)#exit
R3#copy running-config startup-config