Am 22.11.2012 13:38, schrieb Marc Peters:
interesting, the MTU is way lower, than i expected. Through the VPN
tunnel, only 1322 bytes are possible without fragmentation. ScreenOS
adds 42 additional bytes per paket and the FreeBSD box is receiving
1364 bytes, according to tcpdump. From the outside (only one Netscreen
on the way), 1472 is the maximum possible size to send pakets without
fragmentation (-D). Which MTU would you suggest to use? Shouldn't the
MTU discovery of FreeBSD handle this correct?
do you see fragmented tcp packets on the receiving site in tcpdump?
When you load the tcpdump data (tcpdump -s 1500 -w filename ...) into
wireshark, you can graph the speed (bit/sec, packets/sec) and do some
more tcp analysis.
Kind regards,
Ingo Flaschberger
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