Basically, there are three routers with EIGRP enabled. Router A is a neighbor to Router B, Router B is a neighbor to Router C. Router A and Router C are not neighbors.
I have noticed, that Router B does not distribute networks learned from Router A to Router C. And vice versa.
What is the problem with configuration?
Thank you in advance
It looks to me like Paul is on the right track. Quoting from the original post by Fuad:
"Router A is a neighbor to Router B, Router B is a neighbor to Router C. Router A and Router C are not neighbors"
It appears that all three routers are in the same subnet. Normally each router would form a neighbor relationship with all other EIGRP routers in the subnet. It looks like the manual specification of neighbors is preventing the neighbor relationship between router A and router C. router B is not advertising router A routes to router C because it believes that router C should be learning them directly from router A.