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Be aware of speed limits on some older routers
Authored by: flynnmj on Dec 31, '06 07:00:46PM
I can't find exactly where I got these values, but this site: http://www.infrant.com/forum is the forum for a Network Attached Storage company that is decent at supporting OS X. A lot of people are trying to get good performace for gigabit speed from their macs to the NAS.

They have this FAQ entry: http://www.infrant.com/wiki/index.php/FAQ#I.27m_getting_poor_performance_with_my_Mac.__Is_there_anything_I_can_do.3F


sudo ifconfig en0 mtu 1492
sudo sysctl -w net.inet.tcp.delayed_ack=0
sudo sysctl -w net.inet.ip.portrange.last=65535
sudo sysctl -w net.inet.ip.portrange.hilast=65535
sudo sysctl -w kern.ipc.maxsockbuf=524288
sudo sysctl -w net.inet.udp.recvspace=73728
sudo sysctl -w net.inet.tcp.sendspace=65536
sudo sysctl -w net.inet.tcp.recvspace=65536

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