Daer all
Good morning , I'm very pleasure to join your forum , I have problem with
My router which is connected to RADIUS server , more than one can connect with
Specific username , hence they will take same IP , I want any command in CISCO
Router that reject any duplicate IP from RADIUS.

Thank you

Duplicate IP Address Protection (also known as PLMN Address Protection)
Is only available in certan IOS versions.
Hardware details and IOS versions with a network diagram are needed to provide a detailed soloution
Yodatech
(James Yearnd)