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Date:      Mon, 1 Aug 2011 18:20:28 +0100
From:      "Steven Hartland" <killing@multiplay.co.uk>
To:        <freebsd-net@freebsd.org>
Subject:   tcp failing to recover from a packet loss under 8.2-RELEASE?
Message-ID:  <E18D678F05BB4F3B93ADEB304CCA8504@multiplay.co.uk>

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We've been investiging an ongoing issue with some machines
we have in Amsterdam, when receiving files via scp from our
London DC.

Initially we suspected a igb driver issue but after continued
diagnosis including disabling hardware tso and cksums on
both end we're currently investigating the possibility of
a tcp stack issue.

What I believe we're seeing from the tcpdump trace is the
packet loss on the network results in an unrecoverable tcp
session.

>From my very limited knowledge of tcp, I would expect to see
the session to recover after receiving the lost packet by
either a fast retransmit or standard retransmit.

My interpretation of the capture is the packet is indeed resent
by the sender but that the receiver continues to respond
with TCP Dup ACK for said missing packet instead of recovering.

Trace is below, which starts from just before the point
the receiver sees the dropped packet to the point where the sender
gives up and resets the session.

Is my analysis correct and does it look like this is a tcp
stack bug?

tshark -z "proto,colinfo,tcp.seq,tcp.seq" -z "proto,colinfo,tcp.nxtseq,tcp.nxtseq" -r tcp-stall.pcap
  1   0.000000 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 1449  tcp.seq == 1
  2   0.000028 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 2897  tcp.seq == 1449
  3   0.000034 10.10.1.20 -> 10.10.1.10 TCP ssh > 28296 [ACK] Seq=49 Ack=2897 Win=9102 Len=0 TSV=1902423651 TSER=261560659
tcp.seq == 49
  4   0.000051 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 4345  tcp.seq == 2897
  5   0.000078 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 5793  tcp.seq == 4345
  6   0.000084 10.10.1.20 -> 10.10.1.10 TCP ssh > 28296 [ACK] Seq=49 Ack=5793 Win=8921 Len=0 TSV=1902423651 TSER=261560659
tcp.seq == 49
  7   0.000100 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 7241  tcp.seq == 5793
  8   0.000135 10.10.1.10 -> 10.10.1.20 SSH [TCP Previous segment lost] Encrypted request packet len=1448  tcp.nxtseq == 10137
tcp.seq == 8689
  9   0.000147 10.10.1.20 -> 10.10.1.10 TCP ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652 TSER=261560660
SLE=8689 SRE=10137  tcp.seq == 49
 10   0.000167 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 11585  tcp.seq == 10137
 11   0.000173 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#1] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=11585  tcp.seq == 49
 12   0.000180 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 13033  tcp.seq == 11585
 13   0.000186 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#2] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=13033  tcp.seq == 49
 14   0.000191 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 14481  tcp.seq == 13033
 15   0.000197 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#3] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=14481  tcp.seq == 49
 16   0.000201 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 15929  tcp.seq == 14481
 17   0.000209 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#4] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=15929  tcp.seq == 49
 18   0.000229 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 17377  tcp.seq == 15929
 19   0.000237 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#5] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=17377  tcp.seq == 49
 20   0.000460 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 18825  tcp.seq == 17377
 21   0.000469 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#6] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=18825  tcp.seq == 49
 22   0.000505 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 20273  tcp.seq == 18825
 23   0.000511 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#7] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=20273  tcp.seq == 49
 24   0.000513 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 21721  tcp.seq == 20273
 25   0.000519 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#8] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=21721  tcp.seq == 49
 26   0.000528 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 23169  tcp.seq == 21721
 27   0.000535 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#9] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 28   0.000539 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 24617  tcp.seq == 23169
 29   0.000546 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#10] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 30   0.000556 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 26065  tcp.seq == 24617
 31   0.000562 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 9#11] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=8830 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 32   0.000565 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 27513  tcp.seq == 26065
 33   0.000572 10.10.1.20 -> 10.10.1.10 TCP [TCP Window Update] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9011 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 34   0.000579 10.10.1.20 -> 10.10.1.10 TCP [TCP Window Update] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 35   0.000596 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 28961  tcp.seq == 27513
 36   0.000604 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#1] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 37   0.000621 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 30409  tcp.seq == 28961
 38   0.000627 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#2] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 39   0.000650 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 31857  tcp.seq == 30409
 40   0.000657 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#3] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 41   0.000672 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 33305  tcp.seq == 31857
 42   0.000679 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#4] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 43   0.000799 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 34753  tcp.seq == 33305
 44   0.000806 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#5] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 45   0.000857 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 36201  tcp.seq == 34753
 46   0.000866 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#6] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 47   0.000939 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 37649  tcp.seq == 36201
 48   0.000946 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#7] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 49   0.000955 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 39097  tcp.seq == 37649
 50   0.000963 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#8] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423652
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 51   0.001256 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 40545  tcp.seq == 39097
 52   0.001268 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#9] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 53   0.001300 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 41993  tcp.seq == 40545
 54   0.001309 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#10] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 55   0.001352 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 43441  tcp.seq == 41993
 56   0.001359 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#11] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 57   0.001431 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 44889  tcp.seq == 43441
 58   0.001439 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#12] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 59   0.001468 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 46337  tcp.seq == 44889
 60   0.001475 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#13] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 61   0.001492 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 47785  tcp.seq == 46337
 62   0.001498 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#14] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 63   0.001569 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 49233  tcp.seq == 47785
 64   0.001576 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#15] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 65   0.001879 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 50681  tcp.seq == 49233
 66   0.001890 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#16] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 67   0.001925 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 52129  tcp.seq == 50681
 68   0.001933 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#17] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 69   0.002006 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 53577  tcp.seq == 52129
 70   0.002016 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#18] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423653
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 71   0.002218 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 55025  tcp.seq == 53577
 72   0.002225 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#19] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 73   0.002281 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 56473  tcp.seq == 55025
 74   0.002288 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#20] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 75   0.002343 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 57921  tcp.seq == 56473
 76   0.002350 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#21] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 77   0.002525 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 59369  tcp.seq == 57921
 78   0.002535 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#22] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 79   0.002580 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 60817  tcp.seq == 59369
 80   0.002589 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#23] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 81   0.002772 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 62265  tcp.seq == 60817
 82   0.002779 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#24] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 83   0.002826 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 63713  tcp.seq == 62265
 84   0.002834 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#25] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 85   0.002889 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 65161  tcp.seq == 63713
 86   0.002896 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#26] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 87   0.002967 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 66609  tcp.seq == 65161
 88   0.002974 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#27] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423654
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 89   0.003411 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 68057  tcp.seq == 66609
 90   0.003419 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#28] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 91   0.003457 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 69505  tcp.seq == 68057
 92   0.003464 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#29] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 93   0.003557 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 70953  tcp.seq == 69505
 94   0.003564 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#30] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 95   0.003644 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 72401  tcp.seq == 70953
 96   0.003653 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#31] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 97   0.003675 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 73849  tcp.seq == 72401
 98   0.003683 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#32] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
 99   0.003728 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 75297  tcp.seq == 73849
100   0.003735 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#33] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
101   0.003780 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 76745  tcp.seq == 75297
102   0.003792 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#34] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
103   0.003829 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 78193  tcp.seq == 76745
104   0.003842 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#35] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
105   0.003874 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 79641  tcp.seq == 78193
106   0.003883 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#36] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423655
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
107   0.004165 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 81089  tcp.seq == 79641
108   0.004172 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#37] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
109   0.004279 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 82537  tcp.seq == 81089
110   0.004287 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#38] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
111   0.004340 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 83985  tcp.seq == 82537
112   0.004347 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#39] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
113   0.004400 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 85433  tcp.seq == 83985
114   0.004408 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#40] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
115   0.004887 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 86881  tcp.seq == 85433
116   0.004894 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#41] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
117   0.004940 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 88329  tcp.seq == 86881
118   0.004947 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#42] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
119   0.005006 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 89777  tcp.seq == 88329
120   0.005015 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#43] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423656
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
121   0.005140 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 91225  tcp.seq == 89777
122   0.005150 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#44] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
123   0.005194 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 92673  tcp.seq == 91225
124   0.005203 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#45] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
125   0.005263 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 94121  tcp.seq == 92673
126   0.005270 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#46] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
127   0.005413 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 95569  tcp.seq == 94121
128   0.005420 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#47] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
129   0.005480 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 97017  tcp.seq == 95569
130   0.005487 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#48] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
131   0.005504 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 98465  tcp.seq == 97017
132   0.005511 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#49] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
133   0.005528 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 99913  tcp.seq == 98465
134   0.005536 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#50] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
135   0.005553 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 101361  tcp.seq == 99913
136   0.005561 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#51] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
137   0.005576 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 102809  tcp.seq == 101361
138   0.005583 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#52] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
139   0.005627 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 104257  tcp.seq == 102809
140   0.005634 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#53] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
141   0.005689 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 105705  tcp.seq == 104257
142   0.005696 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#54] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
143   0.005704 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 107153  tcp.seq == 105705
144   0.005710 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#55] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
145   0.005716 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 108601  tcp.seq == 107153
146   0.005724 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#56] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
147   0.005727 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 110049  tcp.seq == 108601
148   0.005734 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#57] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
149   0.005739 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 111497  tcp.seq == 110049
150   0.005746 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#58] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
151   0.005756 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 112945  tcp.seq == 111497
152   0.005765 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#59] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
153   0.005768 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 114393  tcp.seq == 112945
154   0.005777 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#60] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
155   0.005781 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 115841  tcp.seq == 114393
156   0.005789 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#61] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423657
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
157   0.006154 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 117289  tcp.seq == 115841
158   0.006162 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#62] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
159   0.006200 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 118737  tcp.seq == 117289
160   0.006207 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#63] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
161   0.006229 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 120185  tcp.seq == 118737
162   0.006237 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#64] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
163   0.006253 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 121633  tcp.seq == 120185
164   0.006259 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#65] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
165   0.006278 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 123081  tcp.seq == 121633
166   0.006285 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#66] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
167   0.006294 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 124529  tcp.seq == 123081
168   0.006300 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#67] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
169   0.006304 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 125977  tcp.seq == 124529
170   0.006310 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#68] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
171   0.006315 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 127425  tcp.seq == 125977
172   0.006323 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#69] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
173   0.006333 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 128873  tcp.seq == 127425
174   0.006340 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#70] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
175   0.006342 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 130321  tcp.seq == 128873
176   0.006349 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#71] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
177   0.006358 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 131769  tcp.seq == 130321
178   0.006365 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#72] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
179   0.006368 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 133217  tcp.seq == 131769
180   0.006375 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#73] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
181   0.006388 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 134665  tcp.seq == 133217
182   0.006395 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#74] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
183   0.006435 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 136113  tcp.seq == 134665
184   0.006446 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#75] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
185   0.006506 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 137561  tcp.seq == 136113
186   0.006516 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#76] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
187   0.006558 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 139009  tcp.seq == 137561
188   0.006565 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#77] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
189   0.006568 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 140457  tcp.seq == 139009
190   0.006574 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#78] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
191   0.006579 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 141905  tcp.seq == 140457
192   0.006585 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#79] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
193   0.006596 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 143353  tcp.seq == 141905
194   0.006603 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#80] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
195   0.006606 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 144801  tcp.seq == 143353
196   0.006612 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#81] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
197   0.006654 10.10.1.10 -> 10.10.1.20 SSH Encrypted request packet len=1448  tcp.nxtseq == 146249  tcp.seq == 144801
198   0.006661 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#82] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560660 SLE=8689 SRE=23169  tcp.seq == 49
199   0.006696 10.10.1.10 -> 10.10.1.20 SSH [TCP Fast Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689
tcp.seq == 7241
200   0.006703 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#83] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423658
TSER=261560666 SLE=8689 SRE=23169  tcp.seq == 49
201   0.246652 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
202   0.246664 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#84] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902423897
TSER=261560896 SLE=8689 SRE=23169  tcp.seq == 49
203   0.518331 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
204   0.518343 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#85] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902424168
TSER=261561156 SLE=8689 SRE=23169  tcp.seq == 49
205   0.852522 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
206   0.852535 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#86] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902424501
TSER=261561476 SLE=8689 SRE=23169  tcp.seq == 49
207   1.311920 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
208   1.311933 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#87] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902424958
TSER=261561916 SLE=8689 SRE=23169  tcp.seq == 49
209   2.022170 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
210   2.022184 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#88] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902425666
TSER=261562596 SLE=8689 SRE=23169  tcp.seq == 49
211   3.233004 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
212   3.233016 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#89] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902426872
TSER=261563756 SLE=8689 SRE=23169  tcp.seq == 49
213   5.444340 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
214   5.444353 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#90] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902429074
TSER=261565876 SLE=8689 SRE=23169  tcp.seq == 49
215   9.658815 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
216   9.658826 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#91] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902433272
TSER=261569916 SLE=8689 SRE=23169  tcp.seq == 49
217  17.882735 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
218  17.882748 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#92] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902441463
TSER=261577796 SLE=8689 SRE=23169  tcp.seq == 49
219  34.113339 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
220  34.113352 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#93] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902457629
TSER=261593356 SLE=8689 SRE=23169  tcp.seq == 49
221  50.343593 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
222  50.343607 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#94] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902473795
TSER=261608916 SLE=8689 SRE=23169  tcp.seq == 49
223  66.567449 10.10.1.10 -> 10.10.1.20 SSH [TCP Retransmission] Encrypted request packet len=1448  tcp.nxtseq == 8689  tcp.seq ==
7241
224  66.567461 10.10.1.20 -> 10.10.1.10 TCP [TCP Dup ACK 34#95] ssh > 28296 [ACK] Seq=49 Ack=7241 Win=9283 Len=0 TSV=1902489954
TSER=261624476 SLE=8689 SRE=23169  tcp.seq == 49
225  82.793601 10.10.1.10 -> 10.10.1.20 TCP 28296 > ssh [RST, ACK] Seq=146249 Ack=49 Win=4163 Len=0 TSV=261640036 TSER=1902489954
tcp.seq == 146249

Just to confirm both machines involved are running 8.2-RELEASE
with both hardware checksums and offloading disabled using
-tso -rxcsum -txcsum.

The sender is using em and the receiver using igb.

    Regards
    Steve


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