[linuxperf] MTU 1500 bytes

[Christian Berger <einStein@donau.de>]

Servus (=bavarian for hello and goodbye)

Well I know why the MTU should be set to 1500 bytes. That's a bit less
than the MTU on ethernet. So if your ISP uses Ethernet (which they
probably do), you can't send larger packets than about 1500 byte. If you
had a higher MTU value, your computer would send longer packets and they
would have to be split up before transmission. If the value is to small
you would send to many packets, each one with it's own header. That
would slow down the transmission, too. So about 1500 bytes is rather
well. You might still go a bit higher to maybe 1600 bytes before they
get splitted up, but that's not sure. For example with PPPoE (ADSL) the
maximum MTU you should set is 1502.

Servus
  Casandro
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