Can’t use same DLCI on overlapping circuits – Cisco Frame Relay

Well this is going to be a short post you might see on a Cisco router. The error I will be going over today is the “error” – “Can’t use same dlci on overlapping circuits”.

There is a few reasons why you are getting this error:

1. You’ve already entered that DLCI on the router somewhere or
2. You’ve already entered that DLCI on the router somewhere

Lol.

Your best friend is to do a “show run | include int” command.

This will show you all the interfaces neatly on the screen. I’m willing to be you will find that DLCI has already been configured on the the router by you or someone else.

This has happened to me a few times because I’ve saved my lab after I set up the DLCI by accident. Then when I visited the lab a week or two later I got this weird error.

Now if you ever get that “Error” message “Can’t use same dlci on overlapping circuits” you will know what to do!