I am facing a problem during deployment. Customer is using Avaya IP phone. If an autheticated workstation/laptop shift from one phone to another, the old switchport session remain there. The laptop acquire IP from new phone but even fail to ping gateway. If I do old phone reset or do 'clear authen sess interface', then laptop ping gateway. 'Clear arp' or 'clear mac-add table dynam' doesnt solve the issue. How can the ISE detect removal of a workstation to clear the authentication.
