Network cofiguration for Hyper V cluster - SERVER 2012 R2

Question

I have total 5 nodes Node1, Node2, Node3, Node4 and Node5 in Hyper V cluster. Every Hyper V host has total 4 NIC physical card. We had created one "Management Virtual Network (Includes two physical NIC)" and "Hyper V Virtual Network (Includes two physical NIC)". My cluster network configuration was as below. Recently I had updated Node1 NIC driver and now I do not see "Cluster Network 1" any more. What could be the reason? I do not get any option to add it.

Answer 1

Hi,
I tried to disable one of my adapters in my environment:

This cluster network 3 is under Hyper-V Network Adapter #2,
Then, I disabled the related adapter:

Then check the failover cluster manager:

Cluster network 3 is gone.

Therefore, I think network adapter should be the main cause of this issue.
Please open network and sharing center and see if you can see the updated adapter, also its status, disabled or not, then check the failover cluster manager and see if you can see the cluster network.
If the adapter can be seen in the Network Connections but you can’t find it in the cluster network, please confirm if you’ve configured the IP properly.
If all the above settings are correct and still you can’t see the adapter, you might need to reinstall the adapter driver.

Thanks for your time.
Best regards,
Danny

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Answer 2

I had checked this with Microsoft. "Cluster Network 1" was created at only one server Node5. So they said , it will not make sense if you configure heart beat at only one server and the configuration is wrong. For example if you select Node5 then down side in Network Connections, that NIC must present at all 5 node but in my case it was at only Node5, you can check attached file. But the weird thing is that I do not know how did that come there since beginning of cluster if that is wrong method?

Do you think that is wrong?

Answer 3

Hi,
It is suggested that each cluster network has its corresponding adapters on every node. Back to this case, node 5 has an extra adapter while the other nodes doesn’t have the corresponding one, that’s probably how this happened.
Back to this case, I noticed that you have 2 network in your environment. One of them is configured ”Client and Cluster”. Since heartbeat can travel on both “Cluster only” and “Cluster and Client”, when cluster network 1 can not communicate with other nodes, we can use the other network, and that’s why your cluster functions normally before.
From the aspect of high availability, I suggest that you add adapters of the same network segment as cluster network 1. This way we will have a network specially used for cluster network, and heartbeat won’t get lost easily.
Thanks for your time.
Best regards,
Danny

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Answer 4

Hi,

In failovercluster manager adding second NIC is disabled, how can i activate it?

In some of Roles it is active and in some roles not active. What can the reason be?

Thanks in Advance.