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8 is better than 10

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It's quite common for the real pmtu to be 8 less than what was
advertised.
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Matthias Radestock committed 2014-08-26 21:11:24 +01:00
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docs/architecture.txt
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@@ -204,6 +204,6 @@ and gets an error informing it of a new PMTU, it will attempt to
verify that PMTU by sending packets of exactly that size to the remote
peer. If it gets no indication from the remote weave that these
packets have been received within a timeout period, it will
artificially drop the PMTU by 10 and try again. Thus this will slowly
artificially drop the PMTU by 8 and try again. Thus this will slowly
reduce the PMTU until a working PMTU is found. This is slow, but it
does work and works around ICMP packets being dropped.