The listing of every component of your system that could possibly have a date conversion problem. This is the determination of the Y2K vulnerability of your inventory. Many manufacturers, like Cisco, have extensive information on their websites. Consult the websites, and compare the inventory to the manufacturer's database. If there is no online database, you may have to contact the companies directly.
Remediation Go and do.
In this step, you conduct those actions determined necessary during assessment. If you are a large company and you have time, you may remediate one small portion of your network and then test it. If it works, you then rollout your remediation to your entire network. Test everything that you can. Testing is likely to take up most of your time.