Studying "ip split-horizon EIGRP AS"

R1#sh ip int bri

Interface                  IP-Address      OK? Method Status                Protocol

Serial0/0                  10.1.1.1        YES manual up                    up     

Serial0/1                  unassigned      YES unset  administratively down down   

Serial0/2                  unassigned      YES unset  administratively down down   

Serial0/3                  unassigned      YES unset  administratively down down   

Loopback0                  1.1.1.1         YES manual up                    up 

R2#sho ip int bri

Interface                  IP-Address      OK? Method Status                Protocol

Serial0/0                  10.1.1.2        YES manual up                    up     

Serial0/1                  unassigned      YES unset  administratively down down   

Serial0/2                  unassigned      YES unset  administratively down down   

Serial0/3                  unassigned      YES unset  administratively down down   

Loopback0                  2.2.2.2         YES manual up                    up     

R3#sh ip int bri

Interface                  IP-Address      OK? Method Status                Protocol

Serial0/0                  10.1.1.3        YES manual up                    up     

Serial0/1                  unassigned      YES unset  administratively down down   

Serial0/2                  unassigned      YES unset  administratively down down   

Serial0/3                  unassigned      YES unset  administratively down down   

Loopback0                  3.3.3.3         YES manual up                    up     

R  (config) #int s0/0

R1(config-if)#frame-relay map ip 10.1.1.2 201 broadcast

R1(config-if)#frame-relay map ip 10.1.1.3 301 broadcast

R2(config-if)#frame-relay map ip 10.1.1.1 201 broadcast

R3(config-if)#frame-relay map ip 10.1.1.1 301 broadcast

R1#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 = 52/67/92 ms

R1#ping 2.2.2.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:

.....

R1(config)#router eigrp 100

R1(config-router)#net 0.0.0.0

R1(config-router)#no au

R2(config)#router eigrp 100

R2(config-router)#network 0.0.0.0

R2(config-router)#no au

R3(config)#router eigrp 100

R3(config-router)#net 0.0.0.0

R3(config-router)#no au

R1#ping 2.2.2.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:

!!!!!

R2#ping 3.3.3.3 source lo0

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:

.....

R1(config-if)#no ip split-horizon eigrp 100

R2#ping 3.3.3.3 source lo0

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:

Packet sent with a source address of 2.2.2.2

!!!!!