How can I redundant Realtime Data in Lan

Hi
I have a windows 2000 advanced server network with Sql server 2000(Static Data)
In my server I have a structre for Real time Data (Dynamic Data in RAM). How can I have a reliable network for fault tolerance.(specially for dynamic data)
I wantto redunant all network with Raid-5 , Clustering ,dual power but it is not enough for real time data .
I want a network design or architucture.
thanks a lot