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You are here: Home / 101 CCNA LABS / IP Routing Solutions / Lab 47 Solution: EIGRP Split Horizon

Lab 47 Solution: EIGRP Split Horizon

Task 1:

For reference information on configuring hostnames, please refer to:

Lab 21 Configuration and Verification Task 1

Lab 35 Configuration and Verification Task 1

Task 2:

Switch#config t

Enter configuration commands, one per line.  End with CNTL/Z.

Switch(config)#hostname Sw1

Sw1(config)#interface fastethernet0/1

Sw1(config-if)#no shutdown

Sw1(config-if)#exit

Sw1(config)#interface fastethernet0/2

Sw1(config-if)#no shutdown

Sw1(config-if)#exit

Sw1(config)#interface fastethernet0/4

Sw1(config-if)#no shutdown

Sw1(config-if)#end

Sw1#

Task 3:

R1#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#int fa0/0

R1(config-if)#ip address 192.168.1.1 255.255.255.192

R1(config-if)#no shutdown

R1(config-if)#end

R1#

R1#show ip interface brief

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            192.168.1.1     YES manual up                    up

Serial1/0                  unassigned      YES unset  administratively down down

Serial0/1                  unassigned      YES unset  administratively down down

R2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R2(config)#int fa0/0

R2(config-if)#ip add 10.1.1.2 255.255.255.0

R2(config-if)#no shut

R2(config-if)#end

R2#

R2#show ip int brie

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            10.1.1.2        YES manual up                    up

Serial0/0                  unassigned      YES unset  administratively down down

Serial0/1                  unassigned      YES unset  administratively down down

R3#config term

Enter configuration commands, one per line.  End with CNTL/Z.

R3(config)#int fa0/0

R3(config-if)#ip address 172.16.3.3 255.255.255.128

R3(config-if)#no shutdown

R3(config-if)#end

R3#

R3#show ip interface brief

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            172.16.3.3      YES manual up                    up

Serial/0                  unassigned      YES unset  administratively down down

Serial0/1                  unassigned      YES unset  administratively down down

Task 4:

For reference information on verifying Frame Relay mapping, please refer to:

Lab 40 Configuration and Verification Task 4

Lab 40 Configuration and Verification Task 5

R1#show frame-relay map

Serial1/0(up): ip 10.0.0.2 dlci 102(0x66,0x1860), static,

broadcast,

CISCO, status defined, active

Serial1/0 (up): ip 10.0.0.3 dlci 103(0x67,0x1870), static,

broadcast,

CISCO, status defined, active

R2#show frame-relay map

Serial0/0 (up): ip 10.0.0.1 dlci 201(0xC9,0x3090), static,

broadcast,

CISCO, status defined, active

Serial0/0 (up): ip 10.0.0.3 dlci 201(0xC9,0x3090), static,

broadcast,

CISCO, status defined, active

R3#show frame-relay map

Serial1/0 (up): ip 10.0.0.1 dlci 301(0x12D,0x48D0), static,

broadcast,

CISCO, status defined, active

Serial1/0 (up): ip 10.0.0.2 dlci 301(0x12D,0x48D0), static,

broadcast,

CISCO, status defined, active

Task 5:

R1#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#router eigrp 1760

R1(config-router)#no auto-summary

R1(config-router)#net 10.0.0.0

R1(config-router)#network 192.168.1.0

R1(config-router)#end

R1#

R2#config t

Enter configuration commands, one per line.  End with CNTL/Z.

R2(config)#router eigrp 1760

R2(config-router)#no auto-summary

R2(config-router)#network 10.0.0.0

R2(config-router)#network 10.1.1.0

R2(config-router)#^Z

R2#

R3#config t

Enter configuration commands, one per line.  End with CNTL/Z.

R3(config)#router eigrp 1760

R3(config-router)#no auto-summary

R3(config-router)#network 10.0.0.0

R3(config-router)#network 172.16.3.0

R3(config-router)#^Z

R3#

R1#show ip eigrp neighbors

IP-EIGRP neighbors for process 1760

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

(sec)         (ms)       Cnt Num

1   10.0.0.2                Se1/0            165 00:01:07   24   200  0  2

0   10.0.0.3                Se1/0            153 00:01:25  124   744  0  2

R2#show ip eigrp neighbors

IP-EIGRP neighbors for process 1760

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

(sec)         (ms)       Cnt Num

0   10.0.0.1                Se0/0            128 00:00:53  911  5000  0  4

R3#show ip eigrp neighbors

IP-EIGRP neighbors for process 1760

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

(sec)         (ms)       Cnt Num

0   10.0.0.1                Se1/0            156 00:02:20    8   200  0  4

Task 6:

R3#show ip route eigrp

192.168.1.0/26 is subnetted, 1 subnets

D       192.168.1.0 [90/2195456] via 10.0.0.1, 00:10:53, Serial1/0

R2#show ip route eigrp

192.168.1.0/26 is subnetted, 1 subnets

D       192.168.1.0 [90/2195456] via 10.0.0.1, 00:10:55, Serial0/0

R1#show ip route eigrp

172.16.0.0/25 is subnetted, 1 subnets

D       172.16.3.0 [90/2195456] via 10.0.0.3, 00:12:23, Serial1/0

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D       10.1.1.0/24 [90/2195456] via 10.0.0.2, 00:12:04, Serial1/0

Task 7:

R1#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

R1(config)#int s1/0

R1(config-if)#no ip split-horizon eigrp 1760

R1(config-if)#end

R1#

*Mar  1 01:20:39.104: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1760: Neighbor 10.0.0.2 (Serial1/0) is down: split horizon changed

*Mar  1 01:20:39.108: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1760: Neighbor 10.0.0.3 (Serial1/0) is down: split horizon changed

*Mar  1 01:20:39.677: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1760: Neighbor 10.0.0.3 (Serial1/0) is up: new adjacency

*Mar  1 01:21:34.122: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1760: Neighbor 10.0.0.2 (Serial1/0) is up: new adjacency

NOTE: When you disable (or re-enable) Split Horizon on an interface, all EIGRP adjacencies that have been established via that interface are reset as indicated in the output above. You can verify the neighbors have reestablished successfully using the show ip eigrp neighbors command as illustrated in the following output.

 

R1#show ip eigrp neighbors

IP-EIGRP neighbors for process 1760

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

(sec)         (ms)       Cnt Num

1   10.0.0.2                Se1/0            131 00:00:50 1512  5000  0  4

0   10.0.0.3                Se1/0            131 00:01:44   13   200  0  5

 

Task 8:

R2#show ip route eigrp

172.16.0.0/25 is subnetted, 1 subnets

D       172.16.3.0 [90/2707456] via 10.0.0.1, 00:00:05, Serial0/0

192.168.1.0/26 is subnetted, 1 subnets

D       192.168.1.0 [90/2195456] via 10.0.0.1, 00:00:05, Serial0/0

R2#ping 172.16.3.3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.3.3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/32/40 ms

R3#show ip route eigrp

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D       10.1.1.0/24 [90/2707456] via 10.0.0.1, 00:00:47, Serial1/0

192.168.1.0/26 is subnetted, 1 subnets

D       192.168.1.0 [90/2195456] via 10.0.0.1, 00:00:47, Serial1/0

R3#ping 10.1.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 24/27/32 ms

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