We have a 2 node SQL 2005 cluster with 2 named instances running. We have a problem that the dynamic discovery of the instance TCP port is not working correctly. If we specify the port on the remote systems the connection to the database is working correctly.
I have used TCPview and netstat and found that the SQL browser service is not listening on UDP port 1434 as it should be. Everything else on the server seems to be running correctly.
The SQL browser service is started and produces no errors when it starts.
Any ideas as to how I can resolve this