> >I have got 96% of 100Mbps under real production load. > > Wouldn't the TCP/IP overhead + ethernet design (collisions) reduce this > figure to more like 70Mbs max in the real world?
As has been pointed out, a lot of people run full duplex these days. With FD ethernet, the maximum achievable bandwidth is easy to compute, but depends on which protocol level you're looking at: - 1500 byte Ethernet payload: Maximum is 1500 / (1500 + 18 + 8 + 12) = 97.53% (ie. 97.53 Mbps for 100 Mbps Ethernet). - 1460 byte TCP payload: Maximum is 1460 / (1500 + 18 + 8 + 12) = 94.93% (ie. 94.93 Mbps for 100 Mbps Ethernet). FreeBSD can get extremely close to these limits. Steinar Haug, Nethelp consulting, [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message
