Subject: [tcpm] RFC793bis draft 14 Reserved Bits

From: Mike Kosek <[email-masked]>
Date: Tue, 12 Nov 2019 16:52:00 +0000

Hi tcpm,

Catching up on draft-ietf-tcpm-rfc793bis-14, I was wondering why the rsrvd bits are not explicitly stated as a formal MUST requirement: 

"Must be zero in generated segments and must be ignored in received segments, if corresponding future features are unimplemented by the sending or receiving host."

To my understanding, the current phrasing is up to interpretation, i.e., someone might opt to not implement it as stated due to the missing formal MUST - Please prove me wrong if I am missing something.

Best Regards,
Mike