With basic EIGRP configurations there shouldn’t be any issues with EIGRP configured routers to able to create neighborships between each other. At this point I’m not 100% sure why this is an option but it is.
Below is an example of how to configure it. (I created a new sub-interface Gi0/0.70 on R1 and Fa0/1.70 on R3 for this example, just to not mess with the the current setup I have on sub-interface 60).
*** Super important, the static neighbor configuration needs to be configured on both routers ***
Configuration:
Router1 –
Router1#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 1
Router1(config-router)#network 10.0.0.0
Router1(config-router)#neighbor 10.10.10.2 gig0/0.70
Router3 –
Router3#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router3(config)#router eigrp 1
Router3(config-router)#network 10.0.0.0
Router3(config-router)#neighbor 10.10.10.1 fa 0/1.70
Verification:
Router3#show ip eigrp neighbors
Router3#show ip eigrp neighbors detail (will actually show that neighbor at 10.10.10.1 is a static neighbor)
