Networking: mtu

MTU, or the Maximum Transmission Unit describes the largest allowed framesize on your network's datalink layer.

T1 frame	1500 byte
Ethernet	1522 byte
Ethernet JumboFrame	9000 byte

The MTU is configured per-server (rather than by the router, switch, ... etc) It is generally negotiated between the two nodes on a network to be the largest size that both nodes can accomodate.

finding your MTU

netstat -i     # linux
ifconfig       # freebsd
??             # windows