[DOC] User manual refactoring

[govpn.git] / doc / mtu.texi

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+@node MTU
+@section MTU
+
+MTU command line argument is maximum allowable size of outgoing GoVPN's
+packets. It varies and depends on your environment, so probably has to
+be tuned. By default MTU equals to 1452 bytes: 40 bytes per IPv6 and 8
+bytes per UDP.
+
+Underlying TAP interface has lower MTU value -- 42 bytes smaller: 26
+bytes overhead on transport message and 14 bytes for Ethernet frame.
+Client and server will print what MTU value should be used on TAP
+interface.