Non-Browser Announcements

A non-browser computer periodically announces itself to the master browser by sending a directed datagram to the master browser on the network. The computer announces its availability in intervals of 1 minute, 2 minutes, 4 minutes, 8 minutes, and 12 minutes, thereafter announcing itself to the master browser every 12 minutes. If the master browser has not heard from the non-browser for three consecutive announcement periods, the master browser removes the non-browser from the browse list.

Note

Therefore it can take up to 36 minutes for the local master browser to remove a stale entry. In addition, the remainder of the domain might require 12 - 24 minutes (twice the master-periodicity) to discover the removal of the stale entry.