Sanitizing table cam in the nav database

Hello,

I have created a pilot installation of NAV, currently handling 16 production switches. It seems that the cam table, holding the MAC addresses seen on the switches is growing very fast and holding large amounts of redundant information, in some cases up to 250 entries per MAC address. I am looking for ways to restrict the amount of history kept, as we only need to know which switch/port a MAC is on, rather than a full history of online/offline status changes.

This can of course be done by scripts, I was wondering though is there any relevant built-in functionality already present?

Thanks, Nik