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I ran: tcpdump -i eth2 -s 0 -w out.pcap host x.4 and x.2 Then I tried "mount -v x.2:/data /data" in another term, waited until after the timeout then ^C then killed the tcpdump 1 0.000000 x.4 -> x.2 TCP 66 739 > nfs [ACK] Seq=1 Ack=1 Win=140 Len=0 TSval=2837501537 TSecr=1577364421 2 0.000034 x.4 -> x.2 NFS 206 [TCP Previous segment not captured] V3 READ Call, FH:0x48bf584a Offset:0 Len:131072 3 0.000127 x.2 -> x.4 TCP 60 nfs > 739 [RST] Seq=1 Win=0 Len=0 4 0.000148 x.2 -> x.4 TCP 60 nfs > 739 [RST] Seq=1 Win=0 Len=0 5 3.000003 x.4 -> x.2 TCP 74 [TCP Port numbers reused] 739 > nfs [SYN] Seq=0 Win=17920 Len=0 MSS=8960 SACK_PERM=1 TSval=2837504537 TSecr=0 WS=128 6 3.000182 x.2 -> x.4 TCP 74 nfs > 739 [SYN, ACK] Seq=0 Ack=1 Win=17896 Len=0 MSS=8960 SACK_PERM=1 TSval=1578327421 TSecr=2837504537 WS=128 7 3.000205 x.4 -> x.2 TCP 66 739 > nfs [ACK] Seq=1 Ack=1 Win=17920 Len=0 TSval=2837504537 TSecr=1578327421 8 3.000228 x.4 -> x.2 NFS 206 V3 READ Call, FH:0x48bf584a Offset:0 Len:131072 9 3.000261 x.2 -> x.4 TCP 66 nfs > 739 [ACK] Seq=1 Ack=141 Win=19072 Len=0 TSval=1578327421 TSecr=2837504537 10 4.100351 x.4 -> x.2 NFS 194 V4 Call PUTROOTFH | GETATTR 11 4.139630 x.2 -> x.4 TCP 66 nfs > 798 [ACK] Seq=4113 Ack=129 Win=157 Len=0 TSval=1578328561 TSecr=2837505637 12 44.294611 x.2 -> x.4 TCP 66 netconfsoaphttp > nfs [ACK] Seq=1 Ack=1 Win=140 Len=0 TSval=1578368716 TSecr=2837365831 13 44.294628 x.4 -> x.2 TCP 66 [TCP ACKed unseen segment] nfs > netconfsoaphttp [ACK] Seq=3969 Ack=2 Win=149 Len=0 TSval=2837545831 TSecr=1578188716 14 44.294634 x.2 -> x.4 TCP 66 [TCP Previous segment not captured] netconfsoaphttp > nfs [FIN, ACK] Seq=2 Ack=1 Win=140 Len=0 TSval=1578368716 TSecr=2837365831 15 44.294688 x.4 -> x.2 TCP 66 [TCP ACKed unseen segment] nfs > netconfsoaphttp [FIN, ACK] Seq=3969 Ack=3 Win=149 Len=0 TSval=2837545831 TSecr=1578368716 16 44.294734 x.2 -> x.4 TCP 60 netconfsoaphttp > nfs [RST] Seq=3 Win=0 Len=0 17 47.294699 x.2 -> x.4 TCP 74 [TCP Port numbers reused] netconfsoaphttp > nfs [SYN] Seq=0 Win=17920 Len=0 MSS=8960 SACK_PERM=1 TSval=1578371716 TSecr=0 WS=128 18 47.294723 x.4 -> x.2 TCP 74 nfs > netconfsoaphttp [SYN, ACK] Seq=0 Ack=1 Win=17896 Len=0 MSS=8960 SACK_PERM=1 TSval=2837548831 TSecr=1578371716 WS=128 19 47.294770 x.2 -> x.4 TCP 66 netconfsoaphttp > nfs [ACK] Seq=1 Ack=1 Win=17920 Len=0 TSval=1578371716 TSecr=2837548831 20 47.294794 x.2 -> x.4 NFS 270 V4 Call READDIR FH:0xcb5e6e28 21 47.294802 x.4 -> x.2 TCP 66 nfs > netconfsoaphttp [ACK] Seq=1 Ack=205 Win=19072 Len=0 TSval=2837548831 TSecr=1578371716 22 47.294975 x.4 -> x.2 NFS 4034 V4 Reply (Call In 20) READDIR 23 47.495918 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 24 47.897918 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 25 48.701955 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 26 50.309927 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 27 53.525953 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 28 59.957895 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 29 62.999962 x.4 -> x.2 TCP 66 [TCP Keep-Alive] 739 > nfs [ACK] Seq=140 Ack=1 Win=17920 Len=0 TSval=2837564537 TSecr=1578327421 30 63.000082 x.2 -> x.4 TCP 66 [TCP Previous segment not captured] nfs > 739 [ACK] Seq=17897 Ack=141 Win=19072 Len=0 TSval=1578387421 TSecr=2837504537 31 64.099972 x.4 -> x.2 TCP 66 798 > nfs [FIN, ACK] Seq=129 Ack=1 Win=140 Len=0 TSval=2837565637 TSecr=1578304804 32 64.100147 x.2 -> x.4 NFS 326 V4 Reply (Call In 10) PUTROOTFH | GETATTR 33 64.100174 x.4 -> x.2 TCP 54 798 > nfs [RST] Seq=130 Win=0 Len=0 34 67.099990 x.4 -> x.2 TCP 74 [TCP Port numbers reused] 798 > nfs [SYN] Seq=0 Win=17920 Len=0 MSS=8960 SACK_PERM=1 TSval=2837568637 TSecr=0 WS=128 35 67.100135 x.2 -> x.4 TCP 74 nfs > 798 [SYN, ACK] Seq=0 Ack=1 Win=17896 Len=0 MSS=8960 SACK_PERM=1 TSval=1578391521 TSecr=2837568637 WS=128 36 67.100158 x.4 -> x.2 TCP 66 798 > nfs [ACK] Seq=1 Ack=1 Win=17920 Len=0 TSval=2837568637 TSecr=1578391521 37 67.100181 x.4 -> x.2 NFS 238 V4 Call READDIR FH:0x0366982c 38 67.100222 x.2 -> x.4 TCP 66 nfs > 798 [ACK] Seq=1 Ack=173 Win=19072 Len=0 TSval=1578391521 TSecr=2837568637 39 67.100241 x.4 -> x.2 NFS 194 V4 Call PUTROOTFH | GETATTR 40 67.100285 x.2 -> x.4 TCP 66 nfs > 798 [ACK] Seq=1 Ack=301 Win=20096 Len=0 TSval=1578391521 TSecr=2837568637 41 67.100332 x.2 -> x.4 NFS 326 V4 Reply (Call In 39) PUTROOTFH | GETATTR 42 67.100339 x.4 -> x.2 TCP 66 798 > nfs [ACK] Seq=301 Ack=261 Win=19072 Len=0 TSval=2837568637 TSecr=1578391521 43 67.111864 x.4 -> x.2 NFS 198 V4 Call GETATTR FH:0x62d40c52 44 67.111991 x.2 -> x.4 NFS 158 [TCP Previous segment not captured] V4 Reply (Call In 43) GETATTR 45 67.112010 x.4 -> x.2 TCP 78 [TCP Dup ACK 43#1] 798 > nfs [ACK] Seq=433 Ack=261 Win=19072 Len=0 TSval=2837568649 TSecr=1578391521 SLE=4373 SRE=4465 46 72.821950 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 47 98.549965 x.4 -> x.2 NFS 4034 [RPC duplicate of #22][TCP Retransmission] V4 Reply (Call In 20) READDIR 48 107.294623 x.2 -> x.4 TCP 66 [TCP Keep-Alive] netconfsoaphttp > nfs [ACK] Seq=204 Ack=1 Win=17920 Len=0 TSval=1578431716 TSecr=2837548831 49 107.294642 x.4 -> x.2 TCP 66 [TCP Keep-Alive ACK] nfs > netconfsoaphttp [ACK] Seq=3969 Ack=205 Win=19072 Len=0 TSval=2837608831 TSecr=1578371716 50 122.999956 x.4 -> x.2 TCP 66 [TCP Keep-Alive] 739 > nfs [ACK] Seq=140 Ack=1 Win=17920 Len=0 TSval=2837624537 TSecr=1578327421 51 123.000088 x.2 -> x.4 TCP 66 [TCP Keep-Alive ACK] nfs > 739 [ACK] Seq=17897 Ack=141 Win=19072 Len=0 TSval=1578447421 TSecr=2837504537 52 123.354599 Solarfla_y -> Solarfla_z ARP 60 Who has x.4? Tell x.2 53 123.354613 Solarfla_z -> Solarfla_y ARP 42 x.4 is at 00:0f:53:z 54 127.110922 x.4 -> x.2 TCP 78 798 > nfs [FIN, ACK] Seq=433 Ack=261 Win=19072 Len=0 TSval=2837628648 TSecr=1578391521 SLE=4373 SRE=4465 55 127.111041 x.2 -> x.4 TCP 66 nfs > 798 [FIN, ACK] Seq=4465 Ack=434 Win=21120 Len=0 TSval=1578451532 TSecr=2837628648 56 127.111068 x.4 -> x.2 TCP 54 798 > nfs [RST] Seq=434 Win=0 Len=0 57 130.110999 x.4 -> x.2 TCP 74 [TCP Port numbers reused] 798 > nfs [SYN] Seq=0 Win=17920 Len=0 MSS=8960 SACK_PERM=1 TSval=2837631648 TSecr=0 WS=128 58 130.111106 x.2 -> x.4 TCP 74 nfs > 798 [SYN, ACK] Seq=0 Ack=1 Win=17896 Len=0 MSS=8960 SACK_PERM=1 TSval=1578454532 TSecr=2837631648 WS=128 59 130.111133 x.4 -> x.2 TCP 66 798 > nfs [ACK] Seq=1 Ack=1 Win=17920 Len=0 TSval=2837631648 TSecr=1578454532 60 130.111146 x.4 -> x.2 NFS 238 V4 Call READDIR FH:0x0366982c 61 130.111162 x.4 -> x.2 NFS 198 V4 Call GETATTR FH:0x62d40c52 62 130.111198 x.2 -> x.4 TCP 66 nfs > 798 [ACK] Seq=1 Ack=173 Win=19072 Len=0 TSval=1578454532 TSecr=2837631648 63 130.111208 x.2 -> x.4 TCP 66 nfs > 798 [ACK] Seq=1 Ack=305 Win=20096 Len=0 TSval=1578454532 TSecr=2837631648 64 130.111290 x.2 -> x.4 NFS 158 V4 Reply (Call In 61) GETATTR 65 130.111296 x.4 -> x.2 TCP 66 798 > nfs [ACK] Seq=305 Ack=93 Win=17920 Len=0 TSval=2837631648 TSecr=1578454532 66 130.111367 x.4 -> x.2 NFS 202 V4 Call GETATTR FH:0x62d40c52 67 130.111430 x.2 -> x.4 NFS 178 V4 Reply (Call In 66) GETATTR 68 130.111463 x.4 -> x.2 NFS 198 V4 Call GETATTR FH:0x62d40c52 69 130.111513 x.2 -> x.4 NFS 158 [TCP Previous segment not captured] V4 Reply (Call In 68) GETATTR 70 130.111521 x.4 -> x.2 TCP 78 [TCP Dup ACK 68#1] 798 > nfs [ACK] Seq=573 Ack=205 Win=17920 Len=0 TSval=2837631648 TSecr=1578454532 SLE=4317 SRE=4409