If you're using Lan Console then it should be easy to get a remote desktop
session into it to check to see how stuff is running.
In STRSST there is an option to work with failed and non reporting
hardware. This can be used to clean up old resource names. If you're in
the habit of dynamically lparing hardware from one lpar to the next be
careful but, with lan console, I suspect you're not.
If you want, and you have the device varied off, you can even rename
resource names. For example TAP35 could be renamed to TAP01.