North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Thoughts on increasing MTUs on the internet
On 12-apr-2007, at 18:07, Saku Ytti wrote: I agree. The throughput gains are small. You're talking about a difference between a 4% header overhead versus a 1% header overhead (for TCP). 6% including ethernet overhead and assuming the very common TCP timestamp option. Out of curiosity how is this calculated?
90 bytes total overhead, 52 deducted from the ethernet payload, 38 added to it. 90 / (1500 - 52 = 1448) * 100 = 6.21 90 / (9000 - 52 = 8948) * 100 = 1 Also note that the real overhead is much bigger because for every two full size TCP packets an ACK is sent so that adds 90 bytes per 2 data packets, or increases the overhead to 9% / 1.5%.
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