Author: sbruno Date: Mon Oct 13 21:04:14 2014 New Revision: 273061 URL: https://svnweb.freebsd.org/changeset/base/273061
Log: Update tcp(4) with plpmtud blackhole sysctls Submitted by: Mikhail <m...@lenta.ru> MFC after: 2 weeks Relnotes: yes Modified: head/share/man/man4/tcp.4 Modified: head/share/man/man4/tcp.4 ============================================================================== --- head/share/man/man4/tcp.4 Mon Oct 13 20:39:51 2014 (r273060) +++ head/share/man/man4/tcp.4 Mon Oct 13 21:04:14 2014 (r273061) @@ -518,6 +518,21 @@ avoid packet drops. Number of retries (SYN or SYN/ACK retransmits) before disabling ECN on a specific connection. This is needed to help with connection establishment when a broken firewall is in the network path. +.It Va pmtud_blackhole_detection +Turn on automatic path MTU blackhole detection. In case of retransmits we will +lower the MSS to check if it's MTU problem. If current MSS is greater than +configured value to try, it will be set to it, otherwise, MSS will be set to +default values (net.inet.tcp.mssdflt and net.inet.tcp.v6mssdflt). +.It Va pmtud_blackhole_mss +MSS to try for IPv4 if PMTU blackhole detection is turned on. +.It Va v6pmtud_blackhole_mss +MSS to try for IPv6 if PMTU blackhole detection is turned on. +.It Va pmtud_blackhole_activated +Number of times the code was activated to attempt a MSS downshift. +.It Va pmtud_blackhole_min_activated +Number of times the blackhole MSS was used in an attempt to downshift. +.It Va pmtud_blackhole_failed +Number of times that we failed to connect after we downshifted the MSS. .El .Sh ERRORS A socket operation may fail with one of the following errors returned: _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
