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What is MTU and its proper settings?

April 26, 2017MTU settings

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What is MTU and its proper settings?

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MTU stands for ‘Maximum Transmission Unit’ and, as its name implies, is the maximum size of each packet sent (in octets). If you notice that your transfers slow down after time, then adjusting the MTU should help to remedy the problem. An optimal setting for MTU would be 1024 over a modem connection, or 1500 if you are connected to a TCP/IP ethernet network. The normal setting for a Winsock connection will be 576. In any case if you’re using Trumpet, the TCPRWIN should be set at 4 times the MTU, and the TCPMSS should be about 40 less than the MTU. ie. MTU = 296, TCPRWIN = 2048, TCPMSS = 256 or MTU = 1024, TCPRWIN = 4096, TCPMSS = 984 or MTU = 1500, TCPRWIN = 6000, TCPMSS = 1460 Simply go into ‘File’ and then ‘Setup’ and make the appropriate changes. If you’re using Windows 95 or a Macintosh, you’ll need to seek documentation (check out the WWW for this) on how to make the changes.