X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=doc%2Fmtu.texi;h=00aa7e7e94e14d68941021aa08b27a8e7a2b67d7;hb=a11b0bda178937e6891770f40f800d69b5640313;hp=ef0db05ebc6343fb7ff403eccf09983ad6afd952;hpb=296f3d2e9197b76209a4e86ed8856aea9195d94c;p=govpn.git

diff --git a/doc/mtu.texi b/doc/mtu.texi
index ef0db05..00aa7e7 100644
--- a/doc/mtu.texi
+++ b/doc/mtu.texi
@@ -1,12 +1,11 @@
 @node MTU
-@section Maximum Transmission Unit
+@subsection Maximum Transmission Unit
 
-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.
+MTU option tells what maximum transmission unit is expected to get from
+TUN/TAP interface. It is per-user configuration. Incoming packets of bigger
+sizes (including the padding byte) will be ignored. If either
+@ref{Noise, noise}, @ref{Encless, encryptionless mode} or @ref{CPR} are
+enabled, then all outgoing packets are filled up to that MTU value.
 
-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.
+Default MTU equals to 1515 bytes (1500 bytes of Ethernet payload, 15
+bytes of Ethernet header).