Qucik EIGRP troubleshooting

If you can ping your neighbor, this confirms that you don't have duplicate ip addresses. The next step is to check the K values but lets assume everything is left to default. You can then ping 224.0.0.10 which is the multicast address that all EIGRP routers should be listening to. If you don't get a response like i am getting below, then EIGRP is not enabled.

EIGRP ENABLED on the neighboring router:
R1#ping 224.0.0.10

Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.0.0.10, timeout is 2 seconds:

Reply to request 0 from 192.168.2.2, 24 ms
Reply to request 0 from 192.168.1.2, 28 ms
R1#

R1#show ip eigrp neighbors
IP-EIGRP neighbors for process 10
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
1   192.168.2.2             Fa0/1             14 00:28:35   41   246  0  28
0   192.168.1.2             Fa0/0             10 00:28:38   48   288  0  29
R1#

EIGRP DISABLED on the neighboring router:

R1#ping 224.0.0.10

Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.0.0.10, timeout is 2 seconds:
.
R1#