diff options
author | sbruno <sbruno@FreeBSD.org> | 2014-12-28 20:56:03 +0000 |
---|---|---|
committer | sbruno <sbruno@FreeBSD.org> | 2014-12-28 20:56:03 +0000 |
commit | 26a4abd5a2ae4b6ab305f595dfd87ca917c51684 (patch) | |
tree | b358a2b38cedd6eab190216b94e45c0e37dab8a8 /share/man | |
parent | 0090bedb0f7c9087a9adf8968a21773d5cb12743 (diff) | |
download | FreeBSD-src-26a4abd5a2ae4b6ab305f595dfd87ca917c51684.zip FreeBSD-src-26a4abd5a2ae4b6ab305f595dfd87ca917c51684.tar.gz |
Correct naming of sysctl pmtud_blackhole_activated_min_mss.
Clarify some statements around PMTUD blackhole detection to make
the behavior more clear in the man page.
Submitted by: Mikhail <mp@lenta.ru>
MFC after: 2 weeks
Diffstat (limited to 'share/man')
-rw-r--r-- | share/man/man4/tcp.4 | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/share/man/man4/tcp.4 b/share/man/man4/tcp.4 index 7814a0d..351e4b4 100644 --- a/share/man/man4/tcp.4 +++ b/share/man/man4/tcp.4 @@ -521,11 +521,11 @@ 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 +In case of retransmits OS 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 +configured value to try, it will be set to configured value, otherwise, +MSS will be set to default values .Po Va net.inet.tcp.mssdflt and .Va net.inet.tcp.v6mssdflt @@ -535,11 +535,12 @@ 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. +Number of times configured values were used in an attempt to downshift. +.It Va pmtud_blackhole_activated_min_mss +Number of times default 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. +Number of connections for which retransmits continued even after MSS +downshift. .El .Sh ERRORS A socket operation may fail with one of the following errors returned: |