We recently moved a web site from an old windows 2003 machine to a windows 2008 machine. This web site loaded content over a network share into the web site (TBH this is a rubbish idea that we plan to be rid of once we get around to it).
We noticed once the sites were deployed onto the new hardware that we were getting lots of:
The network BIOS command limit has been reached
Upon investigation we realised that one of the old sys admins had set the MaxCmds registry setting to it's maximum value on the 2003 machine. So the 2003 machine had 65535 connections and the new one only had 50. Problem solved.
Got me thinking though, the article on this recommend a setting of 2048 (not 65535 as the old sys admin had set).
What are the downsides to having such a large MaxCmds setting??