NLB - the RPC server is not available on the specified computer. To connect to the < Server >

Have a Windows 2008 R2 SP1 NLB service two nodes on VMWare. Bothe nodes have two network cards. Internal one dedicated to NETWORK load balancing and the other for the network.

Management console of NLB on a single poster NLB node is in good health. The two nodes are visible and OK.

Management of NLB on the other node shows only its own node - while the other node is missing. An error when updating...
"The RPC server is not available on the specified computer. "otherNode.com" connection error"

I disabled the back loop check - it makes no difference.

Any help please?

I think I solved the problem...

As I wrote previously, I disabled the back loop check in the registry on both nodes, create a new DWORD (32 bit) key...
HKLM\SYSTEM\CurrentControlSet\Control\Lsa\DisableLoopbackCheck - with a value of 1

Then, I made sure that the link speed & Duplex on all network interfaces are set to a specific value (no Autonegotiation), for example. 1000 Mbps Full Duplex (in my case).
Ideally only the NIC - on each node - connected to the NETWORK load balancing must be configured with hard values.

This solved the RPC error in my environment of NLB.

Hope this helps those who have the same symptoms.

Samuel.

Tags: Windows

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