Performance tuning the network controller (MTU)

'' This article Based on work by tklee, briand, frontalot, and nix. Originally by frontalot. at Linkstationwiki.org ''
 * Every time you send a 1500 size packet out on a MTU1492 network you end up with two packets: 1492 + 8. That's why the speed drops - The second packet is almost empty! If you type:

ifconfig eth0


 * It will show:

MTU = 1500


 * The standard MTU for DSL and cable is 1492 maximum, for DSL via PPPoE it is often 1480 (you best ask your provider for the correct value). You can:

/etc/init.d/networking
 * Add the following line to one of your startup files in the start section, e.g. in

/sbin/ifconfig eth0 mtu 1492

OR

echo "mtu 1492" >> /etc/network/interfaces
 * Add "mtu 1492" (a line by itself) to /etc/network/interfaces