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  1. What happens to a dlci when it goes through a router? is this layer 2 from ISP to your remote site?

  2. Hello Justin

    Frame relay is a layer two technology and as a result, DLCIs do not traverse a router. In this example, the Frame Relay Switch is actually physically a router, a layer three device, but its functionality in this case is a layer two device. This can be seen clearly by the encapsulation of type “frame relay” that is specified in the config. Specifically it is switching between one DLCI to another, something that the ISP would do for the customer.

    The only layer three devices here are the two customer devices. Now the DLCIs and their scope actuall

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  3. Thank you! It seemed that way its just so weird to me because the distance between two company sites can be very far. Thanks again for the help!

  4. Hello Rocky

    The reason why Frame Relay is declining in use is primarily because of the competition it’s facing from cheaper and faster technologies such as Cable, DSL, Metro Ethernet and MPLS, all of which, with the appropriate configuration, can outperform Frame Relay in most cases. Also, these technologies are more compatible with the LAN technologies used while Frame-Relay is completely different and requires the appropriate termination equipment (CSU/DSU etc) at the customer premises.

    Limited bandwidth is not so much an issue as cost per bandwidth unit is.

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