It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit. Which of the following procedures are required to accomplish this task? (Choose three.)
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A. B. C. D. E. F.ACD
To configure an existing serial interface to accept a second Frame Relay virtual circuit, you would need to follow these three steps:
Create virtual interfaces: You need to create virtual interfaces for each of the Frame Relay virtual circuits that you want to add. This is done using the interface command.
Configure each subinterface: Once you have created the virtual interfaces, you need to configure each subinterface with its own unique IP address. This is necessary because each subinterface represents a separate network segment.
Configure static Frame Relay map entries: Finally, you need to configure static Frame Relay map entries for each subinterface network. This is done to map the DLCIs (Data Link Connection Identifiers) of each subinterface to the correct network address. You can use either static mapping or dynamic mapping for this purpose.
Now let's take a closer look at the answer choices:
A. Remove the IP address from the physical interface: This is not required to add a second Frame Relay virtual circuit. You can keep the IP address on the physical interface and configure each subinterface with its own unique IP address.
B. Encapsulate the physical interface with multipoint PPP: This is not required to add a second Frame Relay virtual circuit. Multipoint PPP is used for point-to-multipoint connections, while Frame Relay is used for point-to-point connections.
C. Create the virtual interfaces with the interface command: This is the first step in the process and is required to add a second Frame Relay virtual circuit.
D. Configure each subinterface with its own IP address: This is the second step in the process and is required to add a second Frame Relay virtual circuit.
E. Disable split horizon to prevent routing loops between the subinterface networks: This is not required to add a second Frame Relay virtual circuit. Split horizon is a technique used to prevent routing loops in distance vector routing protocols.
F. Configure static Frame Relay map entries for each subinterface network: This is the third and final step in the process and is required to add a second Frame Relay virtual circuit.