Failover Cluster Manager - NATTing of Cluster IP address

Question

Given that these are the IPs of my failover cluster.

Node 1 IP: XX.XXX.XX.45
Node 2 IP: XX.XXX.XX.46

Cluster IP: XX.XXX.XX.66

When configuring the NAT of my failover cluster, i am only able to translate the Node IP. Since I only have a single public IP, I overload the NAT with my Node IPs (.45 and .46)
Would it be possible to use the cluster IP for NATTing so that I don't need to apply overload to the configuration?

Answer 1

Hi,

Thanks for your information!

After our research, we think your issue is more related with net configuration in general, instead of that in a cluster. As a result, you can re-post your issue to our net forum! Here is the link:
https://learn.microsoft.com/en-us/answers/topics/windows-server-virtualization.html

Thanks for your support and understanding! Besides, would you please help me Accept Answer. An accepted blog can be put on top of our forum, so that people who have a similar issue can get access to their solution more quickly. I would really appreciate it if you could support my work.

BR,
Joan

---

If the Answer is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

Hi,

Thanks for posting on our forum!

Based on your description, I would like to firstly check a few things:

1. What do you mean "NAT"? Is it a typo of NET or you actually refer to network address translation? If it is the later on (I guess it is network address translation), then I will help you query my colleagues in Net.

2) Do you mean overload of cluster network? Based on your environment, I strongly suggest you to have more than one network. Basically, in a cluster, we should at least configure two network: storgae network normally is separated from other uses of traffic. Here are some articles about different uses of traffic and about how to configure multiple networks in a cluster.
Failover Cluster Network basis:

https://techcommunity.microsoft.com/t5/itops-talk-blog/failover-clustering-networking-basics-and-fundamentals/ba-p/1472460

Configuring Network Prioritization on a Failover Cluster

https://techcommunity.microsoft.com/t5/failover-clustering/configuring-network-prioritization-on-a-failover-cluster/ba-p/371683

Failover Clustering - Network Configuration Step By STep

https://social.technet.microsoft.com/Forums/windows/en-US/9b035537-b14a-48ab-8b1d-52c5c6cba7dc/failover-clustering-network-configuration-step-by-step?forum=winserverClustering

Thanks for your support!

BR,
Joan

---

If the Answer is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 3

Hi Joan,

Ethernet adapter NIC1:

Connection-specific DNS Suffix . : abc.com
Link-local IPv6 Address . . . . . : fe80::*
IPv4 Address. . . . . . . . . . . : xx.xx.0.45 (Node 1)
Subnet Mask . . . . . . . . . . . : 255.255.yyy.0
IPv4 Address. . . . . . . . . . . : xx.xx.0.46 (Node 2)
Subnet Mask . . . . . . . . . . . : 255.255.yyy.0
IPv4 Address. . . . . . . . . . . : xx.xx.0.66 (Cluster IP)
Subnet Mask . . . . . . . . . . . : 255.255.yyy.0
Default Gateway . . . . . . . . . : 10.aa.0.b

Tunnel adapter Local Area Connection* 2:

Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::*
IPv4 Address. . . . . . . . . . . : 169.254.*
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

I do mean Network Address Translation. Currently, I am only able to NAT the .45 and .46 IP addresses. I don't see any traffic if I NAT the cluster IP. I am wondering if such issue can be resolved within the FCM configurations, or is this a Network Administration issue?

Thank you.