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Status: Verified (1)

RFC0879, "The TCP Maximum Segment Size and Related Topics", November 1983

Source of RFC: Legacy
Area Assignment: tsv

Errata ID: 4053

Status: Verified
Type: Editorial

Reported By: Susumu Endoh
Date Reported: 2014-07-17
Verifier Name: Martin Stiemerling
Date Verified: 2015-12-16

Section 14 says:

For example, if the IP Security option (11 octets) were in use and
the IP maximum datagram size remained at 576 octets, then the TCP
should send the MSS with a value of 525 (536-11).

It should say:

For example, if the IP Security option (11 octets) were in use and
the IP maximum datagram size remained at 576 octets, then the TCP
should send the MSS with a value of 524 (536-11-1).

Notes:

IP and TCP header must be multiple of 4 octets.

A side note: The value 11 for the IP security option is apparently copied from RFC 791 without considering that a padding to 32 bit word boundaries is required.

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