Ip: 15829871449 total packets received (InReceives) 0 forwarded (ForwDatagrams) 0 incoming packets discarded (InDiscards) 15829871405 incoming packets delivered (InDelivers) 14182698760 requests sent out (OutRequests) 31 outgoing packets dropped 16 dropped because of missing route (OutNoRoutes) 143 fragments failed Icmp: 12710040 ICMP messages received (InMsgs) 167 input ICMP message failed. (InErrors) ICMP input histogram: destination unreachable: 12263649 (InDestUnreachs) timeout in transit: 420248 (InTimeExcds) source quenches: 6 (InSrcQuenchs) redirects: 92 (InRedirects) echo requests: 26045 (InEchos) 28937 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 2892 (OutDestUnreachs) echo replies: 26045 (OutEchoReps) IcmpMsg: InType3: 12263649 InType4: 6 InType5: 92 InType8: 26045 InType11: 420248 OutType0: 26045 OutType3: 2892 Tcp: 25768376 active connections openings (TcpActiveOpens) 647707490 passive connection openings (TcpPassiveOpens) 4647341 failed connection attempts (AttemptFails) 31117340 connection resets received (EstabResets) 3537 connections established (CurrEstab) https://tools.ietf.org/html/rfc793 15817063195 segments received (InSegs) 16491280655 segments send out (OutSegs) 986318177 segments retransmited (RetransSegs) 7440 bad segments received. (InErrs) 91126171 resets sent (OutRsts) Udp: 95601 packets received (InDatagrams) 2569 packets to unknown port received. (NoPorts) 0 packet receive errors (InErrors) 111544 packets sent (OutDatagrams) 0 receive buffer errors (RcvbufErrors) 0 send buffer errors (SndbufErrors) UdpLite: TcpExt: 42045 SYN cookies sent (SyncookiesSent) 12143 SYN cookies received (SyncookiesRecv) 60209039 invalid SYN cookies received (SyncookiesFailed) 4647134 resets received for embryonic SYN_RECV sockets (EmbryonicRsts) 3821 packets pruned from receive queue because of socket buffer overrun (PruneCalled) 63491 ICMP packets dropped because they were out-of-window (OutOfWindowIcmps) 22286 ICMP packets dropped because socket was locked (LockDroppedIcmps) 107834482 TCP sockets finished time wait in fast timer (TW) 46352300 packets rejects in established connections because of timestamp (PAWSEstab) 607439027 delayed acks sent (DelayedACKs) 632566 delayed acks further delayed because of locked socket (DelayedACKLocked) Quick ack mode was activated 199302465 times (DelayedACKLost) 208055 SYNs to LISTEN sockets dropped (ListenDrops) 418093 packets directly queued to recvmsg prequeue. (TCPPrequeued) 122606 bytes directly in process context from backlog (TCPDirectCopyFromBacklog) 79146389 bytes directly received in process context from prequeue (TCPDirectCopyFromPrequeue) 1574327100 packet headers predicted (TCPHPHits) 402495 packets header predicted and directly queued to user (TCPHPHitsToUser) 7766206385 acknowledgments not containing data payload received (TCPPureAcks) 559462251 predicted acknowledgments 24017 times recovered from packet loss due to fast retransmit 72915270 times recovered from packet loss by selective acknowledgements 586 bad SACK blocks received Detected reordering 889310 times using FACK Detected reordering 465211 times using SACK Detected reordering 697 times using reno fast retransmit Detected reordering 13789060 times using time stamp 6344097 congestion windows fully recovered without slow start 10638781 congestion windows partially recovered using Hoe heuristic 1716234 congestion windows recovered without slow start by DSACK 43272810 congestion windows recovered without slow start after partial ack TCPLostRetransmit: 1784385 13185 timeouts after reno fast retransmit 15322792 timeouts after SACK recovery 26945066 timeouts in loss state 104358514 fast retransmits 30761536 forward retransmits 72817949 retransmits in slow start 189678472 other TCP timeouts TCPLossProbes: 324536377 TCPLossProbeRecovery: 76481412 12218 classic Reno fast retransmits failed 27270545 SACK retransmits failed 200116946 DSACKs sent for old packets (TCPDSACKOldSent) 3581427 DSACKs sent for out of order packets 188637563 DSACKs received 1897085 DSACKs for out of order packets received 17269734 connections reset due to unexpected data (TCPAbortOnData) 994645 connections reset due to early user close (TCPAbortOnClose) 71206457 connections aborted due to timeout (TCPAbortOnTimeout) 20 times unable to send RST due to no memory TCPSACKDiscard: 2614 (Number of SACK blocks are invalid) TCPDSACKIgnoredOld: 457719 (Number of DSACK block is invalid, undo_marker not set) TCPDSACKIgnoredNoUndo: 94644730(Number ofDSACK block is invalid,undo_marker set) TCPSpuriousRTOs: 3443956 (Number of The spurious retransmission timeout detected by the `F-RTO`_ algorithm) * skb: The linux networking stack stores data in sk_buff struct TCPSackShifted: 17209501 (Number of skb is shifted) TCPSackMerged: 57304616 (Number of skb is merged) TCPSackShiftFallback: 234570612 (Number of TCP stack doesn't merge it for some reasons.) TCPBacklogDrop: 43 IPReversePathFilter: 3 TCPReqQFullDoCookies: 42045 TCPRetransFail: 271 TCPRcvCoalesce: 606120335 * OFO: Out Of Order TCPOFOQueue: 154893248 (Number of packets queued in OFO queue) TCPOFOMerge: 3581444 (Number of packets in OFO that were merged with other packets) TCPChallengeACK: 2105995 TCPSYNChallenge: 64987 TCPFastOpenCookieReqd: 3824 TCPSpuriousRtxHostQueues: 332 TCPAutoCorking: 19132 TCPWantZeroWindowAdv: 6989 TCPSynRetrans: 106752693 (Number of SYN and SYN/ACK retransmits to break down retransmissions into SYN, fast-retransmits, timeout retransmits, etc. 참고링크) TCPOrigDataSent: 11168295644 (Number of outgoing packets with original data, 참고링크) TCPHystartTrainDetect: 97852 (Number of the ACK train length threshold is detected) * CWND: Congestion Window TCPHystartTrainCwnd: 2647949 (The sum of CWND detected by ACK train length) TCPHystartDelayDetect: 21988563 (Number of the packet delay threshold is detected) TCPHystartDelayCwnd: 781061970 (The sum of CWND detected by packet delay) TCPACKSkippedSynRecv: 1717067 (If the ACk sending frequency is higher than tcp_invalid_ratelimit allows, then +1) * PAWS: Protect Against Wrapped Sequence numbers TCPACKSkippedPAWS: 1738488 TCPACKSkippedSeq: 38312 TCPACKSkippedFinWait2: 2294 TCPACKSkippedTimeWait: 230801 TCPACKSkippedChallenge: 8756 IpExt: InNoRoutes: 41 InOctets: 8387403650946 OutOctets: 12141527324794 InNoECTPkts: 14298811581 InECT1Pkts: 279253858 InECT0Pkts: 271928848 InCEPkts: 981945413
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