Configuring the Frame Relay Switch
hostname FRS
!
frame-relay switching
!
interface Serial 0/0
description FR to HQ
encapsulation frame-relay
clock rate 6400
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 102 interface Serial 0/1 201
frame-relay route 103 interface Serial 0/2 301
no shutdown
!
interface Serial 0/1
description FR to East
no ip address
encapsulation frame-relay
clock rate 64000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 201 interface Serial 0/0 102
no shutdown
!
Interface Serial 0/2
description FR to West
no ip address
encapsulation frame-relay
clock rate 64000
frame-relay lmi-type cisco
frame-relay intf-type dce
frame-relay route 301 interface Serial 0/0 103
no shutdown
Configuring the Frame Relay Endpoints
R1# conf t
R1(config)# interface serial 0/0
R1(config-if)# ip address 10.1.1.1 255.255.255.0
R1(config-if)# encapsulation frame-relay
R1(config-if)# no frame-relay inverse-arp
R1(config-if)# frame-relay map ip 10.1.1.1 103
R1(config-if)# frame-relay map ip 10.1.1.2 102 broadcast
R1(config-if)# frame-relay map ip 10.1.1.3 103 broadcast
R1(config-if)# no shutdown
R2# conf t
R2(config)# interface serial 0/1
R2(config-if)# ip address 10.1.1.2 255.255.255.0
R2(config-if)# encapsulation frame-relay
R2(config-if)# no frame-relay inverse-arp
R2(config-if)# frame-relay map ip 10.1.1.2 201
R2(config-if)# frame-relay map ip 10.1.1.1 201 broadcast
R2(config-if)# frame-relay map ip 10.1.1.3 201 broadcast
R2(config-if)# no shutdown
R3# conf t
R3(config)# interface serial 0/2
R3(config-if)# ip address 10.1.1.3 255.255.255.0
R3(config-if)# no frame-relay inverse-arp
R3(config-if)# encapsulation frame-relay
R3(config-if)# frame-relay map ip 10.1.1.3 301
R3(config-if)# frame-relay map ip 10.1.1.1 301 broadcast
R3(config-if)# frame-relay map ip 10.1.1.2 301 broadcast
R3(config-if)# clock rate 64000
R3(config-if)# no shutdown
Configuring EIGRP
R1(config)# router eigrp 1
R1(config-router)# network 10.0.0.0
R1(config-router)# network 172.16.0.0
R1(config-router)# no auto-summary
R2(config)# router eigrp 1
R2(config-router)# network 10.0.0.0
R2(config-router)# network 172.16.0.0
R2(config-router)# no auto-summary
R3(config)# router eigrp 1
R3(config-router)# network 10.0.0.0
R3(config-router)# network 172.16.0.0
R3(config-router)# no auto-summary
R2# show ip eigrp topology
IP-EIGRP Topology Table for AS(1)/ID(172.16.124.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 172.16.1.0/24, 1 successors, FD is 128256 via Connected, Loopback1
P 172.16.1.0/24, 1 successors, FD is 40640000 via 172.16.124.1 (40640000/128256), Serial0/0/1
P 10.1.1.0/24, 1 successors, FD is 40512000 via Connected, Serial 0/1
Note:- By Default split horizon is enabled so troute advertisements from R2 to R1 do not travel to R3 and vice versa, as shown in the above output.
R1 needs the no ip split-horizon eigrp 1 command on its serial Frame Relay interface. to fix this issue
R1(config)# interface serial 0/0
R1(config-if)# no ip split-horizon eigrp 1
Verify that you see the correct EIGRP adjacencies with the show ip eigrp neighbors command:
R1# show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 10.1.1.2 Se0/0 176 00:00:05 1588 5000 0 6
0 10.1.1.3 Se0/0 176 00:00:05 23 1140 0 6
R2# show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 10.1.1.1 Se0/1 129 00:00:52 20 2280 0 20
Verify that you have IP routes on all three routers and verify full connectivity
R2# ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
R2# ping 10.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.3, timeout is 2 seconds:
!!!!!
