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I have followed the instructions from the VMware page that explains how to Add a Host-Only Virtual Network to my configurations, but I also want to change the subnet mask for my new interface. I have tried to follow the instructions provided from another doc, but I get an error when attempting to modify the subnet mask to class B or 255.255.0.0. For instance, the network settings I want to use are within the range 10.8.241.0/16. This works with no problem in VirtualBox: however, I receive the error notice win Vmware when I attempt to apply the same kind of settings:

Does anyone know why this is the case? I am not aware of any network files that I could manually modify on a Windows 10 host machine as described in Linux systems from here or here

EDIT: Since this post was "closed", the answer and justifications were offered from the official VMware forum at this post.

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  • Note that Class B and Class C (and Classes in general) were abolished in 1993 and haven't been used in almost 30 years.
    – Jörg W Mittag
    Sep 18, 2022 at 8:16
  • Network address classes are dead (please let them rest in peace), killed in 1993 (two years before the commercial Internet in 1995) by RFCs 1517, 1518, and 1519, which defined CIDR (Classless Inter-Domain Routing). We have not had network address classes in this century.
    – Ron Maupin
    Sep 19, 2022 at 17:43

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The error message is pretty clear: according to your subnet mask, you have 16 bits for the network address and 16 bits for the host address. However, your Subnet IP has some bits in the host part of the address set. That is not allowed. You need to make sure your Subnet IP has no bits set in the host part of the address.

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