Dupilcate secondary IP's on 2 Hub servers for the Cas Array on VM ware 5.5

I was told today that MS had worked with this company before and they may have recommended the secondary ip on the nic's to be the exact same address. We are experiencing issues with ping by name and ip that are not working or inconsistent. Even after adding
host files and flushing DNS we had to V motion one of our mailbox servers to another cluster because we lost mail flow. It worked fine after that. After reading up on VM ware patching for 5.1 and possible related issues we decided to move directly to 5.5 and
patch from there.
It appears we are still having issues but we have not had to move one of the 3 mailbox servers around yet. I have used secondary IP's and so on for many applications but I have not seen this needing to be duplicated on 2 separate servers that run in production
without some sort of DR configuration when the primary fails.
Charles B. Giles

Hi,
I don't think it is required unless if it is a Virtual IP of NLB/Cluster.
Kottees :My Blog Please mark it as an answer if it really helps you.

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