We have an issue at the moment whereby a single server in the farm will get itself into a state where it wont complete logons (we are investigating this seperatly). Because the failed server stops logging on new users it quickly becomes the least loaded server in the farm and soon all new server requests are sent to the failed server (called black hole from my Citrix days).
At the moment we have to put the failed server in drain mode - but this is not before lost of users have been impacted.
My question is if you can configure the connection broker to round robin connections rather than based on load? this would prevent all new user connectsion being passed to the failed server...
Regards