[Bug 143666] [ip6] [request] PMTU black hole detection not implemented

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=143666

Michael Tuexen <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|Open                        |Closed
         Resolution|---                         |FIXED
                 CC|                            |[email protected]

--- Comment #7 from Michael Tuexen <[email protected]> ---
I think this can be closed, since PMTU balckhole detection is now implemented.
From tcp.4:
 pmtud_blackhole_detection
                            Enable automatic path MTU blackhole detection.  In
                            case of retransmits of MSS sized segments, the OS
                            will lower the MSS to check if it's an MTU
                            problem.  If the current MSS is greater than the
                            configured value to try
                            (net.inet.tcp.pmtud_blackhole_mss and
                            net.inet.tcp.v6pmtud_blackhole_mss), it will be
                            set to this value, otherwise, the MSS will be set
                            to the default values (net.inet.tcp.mssdflt and
                            net.inet.tcp.v6mssdflt).  Settings:
                            0       Disable path MTU blackhole detection.
                            1       Enable path MTU blackhole detection for
                                    IPv4 and IPv6.
                            2       Enable path MTU blackhole detection only
                                    for IPv4.
                            3       Enable path MTU blackhole detection only
                                    for IPv6.

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