From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- Documentation/networking/Configurable | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/networking/Configurable (limited to 'Documentation/networking/Configurable') diff --git a/Documentation/networking/Configurable b/Documentation/networking/Configurable new file mode 100644 index 0000000..69c0dd4 --- /dev/null +++ b/Documentation/networking/Configurable @@ -0,0 +1,34 @@ + +There are a few network parameters that can be tuned to better match +the kernel to your system hardware and intended usage. The defaults +are usually a good choice for 99% of the people 99% of the time, but +you should be aware they do exist and can be changed. + +The current list of parameters can be found in the files: + + linux/net/TUNABLE + Documentation/networking/ip-sysctl.txt + +Some of these are accessible via the sysctl interface, and many more are +scheduled to be added in this way. For example, some parameters related +to Address Resolution Protocol (ARP) are very easily viewed and altered. + + # cat /proc/sys/net/ipv4/arp_timeout + 6000 + # echo 7000 > /proc/sys/net/ipv4/arp_timeout + # cat /proc/sys/net/ipv4/arp_timeout + 7000 + +Others are already accessible via the related user space programs. +For example, MAX_WINDOW has a default of 32 k which is a good choice for +modern hardware, but if you have a slow (8 bit) Ethernet card and/or a slow +machine, then this will be far too big for the card to keep up with fast +machines transmitting on the same net, resulting in overruns and receive errors. +A value of about 4 k would be more appropriate, which can be set via: + + # route add -net 192.168.3.0 window 4096 + +The remainder of these can only be presently changed by altering a #define +in the related header file. This means an edit and recompile cycle. + + Paul Gortmaker 06/96 -- cgit v1.1