allowed to exceed max_ack_delay?

Martin Duke <martin.h.duke@gmail.com> Wed, 20 March 2019 20:27 UTC

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From: Martin Duke <martin.h.duke@gmail.com>
Date: Wed, 20 Mar 2019 13:27:01 -0700
Message-ID: <CAM4esxT76x2USTpehwAZ2Qyr=S8EDW_fNfKS22nZcAHDLax=tQ@mail.gmail.com>
Subject: allowed to exceed max_ack_delay?
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Section 13.1.1 states:
"The receiver's delayed acknowledgment timer SHOULD NOT exceed the current
RTT estimate or the value it indicates in the max_ack_delay transport
parameter."

Do we intend to allow exceeding max_ack_delay? Should it be a MUST NOT?