A. Add the area 1 stub command on routers R1.
B. Add the always keyword to the default - information originate configuration command on router R2.
C. Remov e the default information originate configuration command from router R2 and place it on router R1.
D. Add the ip route 5.0.0.0 255.255.255.0 0.0.0.0 command to router R2.

A. The BGP split - horizon rule specifies that routes learned via EBGP are never propagated to other IBGP peers.
B. The BGP split horizon rule specifies that routes learned via IBGP are never propagated to other IBGP peers.
C. A full - mesh IBGP requires that neighbor relationships be established between a ll BGP enabled routers in the autonomous system.
D. IBGP neighbors must be in different autonomous systems.
E. An EGP or static routing is required between IBGP neighbors.