Hello Heng
The remote-neighbors command is used to enable an EIGRP router to become remote neighbors by accepting inbound connections from any remote IP address. This command includes configuration parameters such as:
- the use of multicast or unicast
- can accept connections without manually configuring the remote neighbor IP address
- can encapsulate neighbor route data within LISP
- can specify from which remote IP addresses EIGRP neighborships will be accepted
- can specify the maximum number of neighbors.
The command that you mention in your post is related but functions differently. The neighbor command must specify the IP address of the neighbor in question. You can use the remote keyword to indicate that the neighbor is not in the same subnet as the local interface.
The following two links show detailed information about both of these commands:
I hope this has been helpful!
Laz