nearly every packet is fragmented, if i read th [TCP segment of a
reassembled PDU] correct. Those have a length of 1364. Thera are also
lots of [TCP Window Update] (every two to three acks from the receiving
host, where the tcpdump took place). After some time, there were lots of
[TCP Dup ACK] from the receiving host and the throughput went to a crawl
and had lots of retransmissions. After 30 sec. everything went back to
"normal" as of transmitting pakets without dubs and retransmissions.
how you can detect fragmented packets:
tcpdump at sender and at receiver site.
If you send 1500 byte packets but receive 2 differnt sized packets (a
bigger and a smaller one) at the other site - than there is fragmentation.
1364 packet length seems strage, as your
max icmp packet is 1322 byte + 20byte IP header + 8byte icmp = mtu 1350?
The same tcpdump collect on the Linux hosts, the packets had a length of
1514 and no dubs or retransmissions.
1514? max mtu on ethernet is 1500
can you send me (directly) a send and receive site tcpdump from linux
and freebsd for a whole data-transfer?
Kind regards,
Ingo Flaschberger
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