After applying SP3 to BPC 5.1 we get this error: Server error in '/Osoft Application. the request failed with HTTP Status 401: Unauthorized.
To get around it I turn off IIS on one BPC server (which leaves the other BPC server to handle the load). We have 2 BPC servers load balanced that back into a single SQL server. The BPCs are behind a hardware NLB (Alteon 3508). It doesn't matter which server I turn IIS off from just so I don't leaave them both on. If I do leave them both on it will start throwing this error within 20 min.
It seems as though the NLB is not handling (or BPC web services) connection properly. We do have several other applications running though this same NLB and work fine. The only configuration we have on the NLB for this VIP is IP based, persistent connections.
Any insight would be very appreciated.