![]() just the summary lines) if all packet fields are desired. Someone wants to do the analysis, as well as a "verbose" output from I'm happy to provide the pcap files from both server and client if ![]() Strange that NIC difference manifests itself like this (and in some Think this is a libpcap/tcpdump quirk/bug of sorts. Wireshark seems to decode server capture correctly, so I'm inclined to Yet my capture with em(4) + TSO shows "bad-len 0". Thus, the "bad-len 0" messages in tcpdump are indicators of TSO beingÄoug's capture with msk(4) + TSO shows a TCP length that exceeds MTU, Reassembled PDU" **that exceed MTU (>1500)** in Wireshark (when Verified by comparing to the number of lines labelled "TCP segment of These correlate directly with TCP payloads that exceed MTU - this is In the below tcpdump on the server, you'll find 5 "bad-len 0" messages. > tcpdump sees the segment before TCP segmentation. > segmentation but Doug's tcpdump looks completely normal to me since > It's possible for controller to corrupt the TCP segment during > segment with tcpdump on TX path, probably TSO was not used for the > segment, you should see a series of small TCP packets on receiver tcpdump sees a (big) TCP segment right before > show a difference in behaviour compared to what Doug sees. > tcpdump (on the FreeBSD side) and Wireshark (on the Windows side) that > I can provide packet captures on both ends of a LAN segment using both > This is not the behaviour I see with em(4) on a 82573E with all defaults Disable TSO with ifconfig if it interferes with your ssldump. > You have TSO enabled on the interface, so large outgoing TCP packet is pretty normal. Could this possibly be related to the hardware checksums? ssldump complains about the packet too and stops monitoring. ![]() This is part of a SSL/TLS exchange and one side or the other is hanging on this and just dropping the connection. There is a router and switch between them. ![]() > The indicated packet length is 3946 and the load of data shown is that size. > It sent the following packet: (data content abbreviated) > media: Ethernet autoselect (100baseTX ) > Monitoring a tcpdump between two systems, a FreeBSD 9.1 system has the following interface: On Thu, at 10:37:23AM +0900, YongHyeon PYUN wrote:
0 Comments
Leave a Reply. |