NAS-130434 / 24.10 / drop ntb0 MTU to 64000 #14136
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bugclerk
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bmeagherix
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Aug 5, 2024
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At time of writing, ntb on SCALE has pathological behavior related TCP/IP Window size calculation whereby the receiving side clamps the window size to 0 causing recalculation which, ultimately, ends with behavior described in https://en.wikipedia.org/wiki/Silly_window_syndrome. The work-around is to drop MTU size a bit which fixes the scenario altogether. When we discover why this is happening, we should remove the MTUBytes line in this file.