Re: (PM) DLCI on primary and subint

John Storms (jstorms@livingston.com)
Wed, 17 Jun 1998 06:54:58 -0700

As Mr. Platts pointed out, the DLCI is an identifier which (to work nicely)
needs to be unique by protocol. So you can use a DLCI 16 for IP and then
also use DLCI 16 for IPX. The DLCI number maps the network protocol (IP or
IPX) to the data link layer.

At 08:38 AM 6/17/98 -0500, Kyle Platts wrote:
>R Gibbons wrote:
>>
>> Do primary and subinterface DLCI's have to be unique i.e.
>> Primary : 16 192.168.1.1
>> Subint : 17 192.168.2.1
>>
>> or can I have 16's on each i.e.
>> Primary : 16 192.168.1.1
>> Subint : 16 192.168.2.1
>>
>> I'm assuming they have to be unique.
>
>Your assumption is correct. A DLCI is a logical identifier over a
>physical interface, ie T1. If you were to send data into the frame cloud
>with the same DLCI and expect it to go 2 different directions, how is
>the switch to know which way you want the data to go? Frame relay
>switches are layer 2 devices only and have no knowledge of layer 3
>protocols.
>
>
>--
>Kyle Platts
>Network Engineer
>!NTERPRISE Networking Services
>U S WEST Communications
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---
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