Frame Relay question

Answered Question

When setting up a frame relay topology, and setting up the serial interfaces on the spoke routers (hub and spoke topology) is it required to specify "point-to-point" or "multipoint" on the interfaces? The only way to specify these settings are to create subinterfaces and I am using the physical interface and assigning an ip to that. Perhaps that is why frame relay is not working. (??)

Correct Answer by Edison Ortiz about 7 years 4 months ago

is it required to specify "point-to-point" or "multipoint" on the interfaces?


If you are planning to use subinterfaces, you need to select an subinterface type - the options are the ones you mentioned. However, for frame-relay is not always required to create subinterfaces. If you can provide the requirements, we can help you further.


and I am using the physical interface and assigning an ip to that. Perhaps that is why frame relay is not working


If you are using the main interface, it has the same effect as using a multipoint interface. You have to make sure the frame-relay mappings are either assigned dynamically or statically. With point-to-point subinterfaces, you aren't concerned with frame-relay mappings so the setup is much easier.

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Correct Answer
Edison Ortiz Wed, 02/24/2010 - 20:32
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is it required to specify "point-to-point" or "multipoint" on the interfaces?


If you are planning to use subinterfaces, you need to select an subinterface type - the options are the ones you mentioned. However, for frame-relay is not always required to create subinterfaces. If you can provide the requirements, we can help you further.


and I am using the physical interface and assigning an ip to that. Perhaps that is why frame relay is not working


If you are using the main interface, it has the same effect as using a multipoint interface. You have to make sure the frame-relay mappings are either assigned dynamically or statically. With point-to-point subinterfaces, you aren't concerned with frame-relay mappings so the setup is much easier.

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