How should a router that is being used in a Frame Relay network be configured to

Question

How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates? A: Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface B: Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic C: Configure many sub-interfaces on the same subnet D: Configure a single sub-interface to establish multiple PVCconnections to multiple remote router interfaces Explain ur answer

Explanation / Answer

Correct Answer: A Explanation: Study the figure below: check the figure http://orbitco-ccna-pastquestions.com/images/Q5.jpg In the figure above, router R1 has two point-to-point Subinterfaces. The se0.1 subinterface connects to router R3 and the se0.2 subinterface connects to router R2. Each subinterface is on a different subnet. By using Frame Relay subinterfaces, this ensures that a single physical interface is treated as multiple virtual interfaces to overcome split horizon rules. Packets received on one virtual interface can be forwarded to another virtual interface, even if they are configured on the same physical interface. If you can recall that split horizon is a technique used to prevent a routing loop in networks using distance vector routing protocols. Split horizon updates reduce routing loops by preventing a routing update received on one interface to be forwarded out the same interface.

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