Hi, Having an issue trying to sort out why Im getting smashed with TCP Retransmission, TCP Out-Of-Order, TCP Dups. Also seeing loads of NBSS Continuation Message. This has been stripped down to 2 laptops and a switch and router - Router on a stick. ZBWL disabled. Host Firewalls not blocking. Just a file copy between 2 laptops on the different VLANs. Have tried a pacp with 2 laptops on same VLAN and just the Switch, still loads of black packets. MTUs in this simple (cutdown) setup are 1500--Pcap has 1500+14 ethernet header.
Any info on how I need to start to work my way through this please? Thanks
501771 52.701934 10.2.55.11 10.2.20.11 TCP 1514 501771 66359 309815355 309816815 [TCP Retransmission] 60422 → 445 [ACK] Seq=309815355 Ack=66359 Win=2101760 Len=1460
501772 52.702037 10.2.20.11 10.2.55.11 TCP 60 501772 309813895 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309813895 Win=2102272 Len=0
501773 52.702170 10.2.20.11 10.2.55.11 TCP 60 501773 309816815 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309816815 Win=2102272 Len=0
501774 52.703239 10.2.55.11 10.2.20.11 TCP 1514 501774 66359 309816815 309818275 [TCP Retransmission] 60422 → 445 [ACK] Seq=309816815 Ack=66359 Win=2101760 Len=1460
501775 52.703239 10.2.55.11 10.2.20.11 TCP 1514 501775 66359 309818275 309819735 [TCP Retransmission] 60422 → 445 [ACK] Seq=309818275 Ack=66359 Win=2101760 Len=1460
501776 52.703239 10.2.55.11 10.2.20.11 TCP 1514 501776 66359 309819735 309821195 [TCP Retransmission] 60422 → 445 [ACK] Seq=309819735 Ack=66359 Win=2101760 Len=1460
501777 52.703380 10.2.55.11 10.2.20.11 TCP 1514 501777 66359 309821195 309822655 [TCP Retransmission] 60422 → 445 [ACK] Seq=309821195 Ack=66359 Win=2101760 Len=1460
501778 52.703380 10.2.55.11 10.2.20.11 TCP 1514 501778 66359 309822655 309824115 [TCP Retransmission] 60422 → 445 [ACK] Seq=309822655 Ack=66359 Win=2101760 Len=1460
501779 52.703380 10.2.55.11 10.2.20.11 TCP 1514 501779 66359 309824115 309825575 [TCP Retransmission] 60422 → 445 [ACK] Seq=309824115 Ack=66359 Win=2101760 Len=1460
501780 52.703380 10.2.55.11 10.2.20.11 TCP 1514 501780 66359 309825575 309827035 [TCP Retransmission] 60422 → 445 [ACK] Seq=309825575 Ack=66359 Win=2101760 Len=1460
501781 52.703380 10.2.55.11 10.2.20.11 TCP 1514 501781 66359 309827035 309828495 [TCP Retransmission] 60422 → 445 [ACK] Seq=309827035 Ack=66359 Win=2101760 Len=1460
501782 52.703388 10.2.20.11 10.2.55.11 TCP 60 501782 309822655 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309822655 Win=2102272 Len=0
501783 52.703539 10.2.20.11 10.2.55.11 TCP 60 501783 309827035 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309827035 Win=2102272 Len=0
501784 52.703718 10.2.55.11 10.2.20.11 TCP 1514 501784 66359 309828495 309829955 [TCP Retransmission] 60422 → 445 [ACK] Seq=309828495 Ack=66359 Win=2101760 Len=1460
501785 52.703718 10.2.55.11 10.2.20.11 TCP 1514 501785 66359 309829955 309831415 [TCP Retransmission] 60422 → 445 [ACK] Seq=309829955 Ack=66359 Win=2101760 Len=1460
501786 52.703718 10.2.55.11 10.2.20.11 TCP 1514 501786 66359 309831415 309832875 [TCP Retransmission] 60422 → 445 [ACK] Seq=309831415 Ack=66359 Win=2101760 Len=1460
501787 52.703858 10.2.55.11 10.2.20.11 TCP 1514 501787 66359 309832875 309834335 [TCP Retransmission] 60422 → 445 [ACK] Seq=309832875 Ack=66359 Win=2101760 Len=1460
501788 52.703858 10.2.55.11 10.2.20.11 TCP 1514 501788 66359 309834335 309835795 [TCP Retransmission] 60422 → 445 [ACK] Seq=309834335 Ack=66359 Win=2101760 Len=1460
501789 52.703858 10.2.55.11 10.2.20.11 TCP 1514 501789 66359 309835795 309837255 [TCP Retransmission] 60422 → 445 [ACK] Seq=309835795 Ack=66359 Win=2101760 Len=1460
501790 52.703858 10.2.55.11 10.2.20.11 TCP 1514 501790 66359 309837255 309838715 [TCP Retransmission] 60422 → 445 [ACK] Seq=309837255 Ack=66359 Win=2101760 Len=1460
501791 52.703858 10.2.55.11 10.2.20.11 TCP 1514 501791 66359 309838715 309840175 [TCP Retransmission] 60422 → 445 [ACK] Seq=309838715 Ack=66359 Win=2101760 Len=1460
501792 52.703989 10.2.20.11 10.2.55.11 TCP 60 501792 309752575 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309752575 Win=2102272 Len=0
501793 52.703989 10.2.20.11 10.2.55.11 TCP 60 501793 309837255 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309837255 Win=2102272 Len=0
501794 52.704020 10.2.20.11 10.2.55.11 TCP 60 501794 309840175 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309840175 Win=2102272 Len=0
501795 52.704228 10.2.55.11 10.2.20.11 TCP 1514 501795 66359 309878135 309879595 60422 → 445 [ACK] Seq=309878135 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501796 52.704372 10.2.55.11 10.2.20.11 TCP 1514 501796 66359 309879595 309881055 60422 → 445 [ACK] Seq=309879595 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501797 52.704372 10.2.55.11 10.2.20.11 TCP 1514 501797 66359 309881055 309882515 60422 → 445 [ACK] Seq=309881055 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501798 52.704372 10.2.55.11 10.2.20.11 TCP 1514 501798 66359 309882515 309883975 60422 → 445 [ACK] Seq=309882515 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501799 52.704372 10.2.55.11 10.2.20.11 TCP 1514 501799 66359 309883975 309885435 60422 → 445 [ACK] Seq=309883975 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501800 52.705001 10.2.55.11 10.2.20.11 TCP 1514 501800 66359 309840175 309841635 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309840175 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501801 52.705001 10.2.55.11 10.2.20.11 TCP 1514 501801 66359 309841635 309843095 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309841635 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501802 52.705001 10.2.55.11 10.2.20.11 TCP 1514 501802 66359 309843095 309844555 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309843095 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501803 52.705025 10.2.20.11 10.2.55.11 TCP 60 501803 309756955 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309756955 Win=2102272 Len=0
501804 52.705140 10.2.55.11 10.2.20.11 TCP 1514 501804 66359 309844555 309846015 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309844555 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501805 52.705140 10.2.55.11 10.2.20.11 TCP 1514 501805 66359 309846015 309847475 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309846015 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501806 52.705140 10.2.55.11 10.2.20.11 TCP 1514 501806 66359 309847475 309848935 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309847475 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501807 52.705140 10.2.55.11 10.2.20.11 TCP 1514 501807 66359 309848935 309850395 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309848935 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501808 52.705140 10.2.55.11 10.2.20.11 TCP 1514 501808 66359 309850395 309851855 [TCP Out-Of-Order] 60422 → 445 [ACK] Seq=309850395 Ack=66359 Win=2101760 Len=1460 [TCP segment of a reassembled PDU]
501809 52.705369 10.2.20.11 10.2.55.11 TCP 60 501809 309847475 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309847475 Win=2102272 Len=0
501810 52.705369 10.2.20.11 10.2.55.11 TCP 60 501810 309851855 66359 66359 445 → 60422 [ACK] Seq=66359 Ack=309851855 Win=2102272 Len=0
