Is it true that Windows STILL does not support /31 IPv4 static assignments?

Question

Is it true that Microsoft still does not support a /31 static IPv4 assignment? If not are there plans to? It's pretty embarrassing that this would still not be supported considering the RFC for /31 subnets has been around for about 23 years now...

Please confirm if this is not supported and if it's not, please direct your engineers to RFC 3021....

Answer 1

Hello there,

Using IPv4 /31 subnet is no longer supported.

A /31 network actually has two usable hosts for a point-to-point link.

With ever-increasing pressure to conserve IP address space on the Internet, it makes sense to consider where relatively minor changes can be made to fielded practice to improve numbering efficiency. One such change, proposed by this document, is to halve the amount of address space assigned to point-to-point links (common throughout the Internet infrastructure) by allowing the use of 31-bit subnet masks in a very limited way.

Hope this resolves your Query !!

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