From: Hannes Frederic Sowa Date: Sat, 14 Dec 2013 03:42:13 +0000 (+0100) Subject: ipv4: improve documentation of ip_no_pmtu_disc X-Git-Tag: v3.13-rc5~30^2~4 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=188b04d580ab7acf11eb77cb564692050c10edfe;p=~emulex%2Finfiniband.git ipv4: improve documentation of ip_no_pmtu_disc Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 3c12d9a7ed0..8a984e994e6 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -16,8 +16,12 @@ ip_default_ttl - INTEGER Default: 64 (as recommended by RFC1700) ip_no_pmtu_disc - BOOLEAN - Disable Path MTU Discovery. - default FALSE + Disable Path MTU Discovery. If enabled and a + fragmentation-required ICMP is received, the PMTU to this + destination will be set to min_pmtu (see below). You will need + to raise min_pmtu to the smallest interface MTU on your system + manually if you want to avoid locally generated fragments. + Default: FALSE min_pmtu - INTEGER default 552 - minimum discovered Path MTU