Key counters
| Counter | Value | Meaning |
|---|---|---|
| Tcp.RetransSegs | 0 | segments sent again; a rising rate means loss on the path |
| TcpExt.ListenOverflows | 0 | SYNs dropped because a listen backlog was full |
| TcpExt.ListenDrops | 0 | all SYN drops at listening sockets |
| TcpExt.TCPBacklogDrop | 0 | segments dropped because a socket was busy |
| TcpExt.TCPTimeouts | 0 | retransmission timeouts |
| Tcp.InErrs | 0 | bad segments received, such as checksum errors |
| Tcp.AttemptFails | 0 | |
| Tcp.EstabResets | 0 | |
| Udp.InErrors | 0 | datagrams that could not be delivered |
| Udp.RcvbufErrors | 0 | datagrams dropped because a socket receive buffer was full |
| Udp.SndbufErrors | 0 | |
| Udp.NoPorts | 0 | datagrams to a port nothing listens on |
| Ip.InDiscards | 0 | |
| Ip.InAddrErrors | 0 | packets for an address this host does not have, while not forwarding |
| Ip.OutNoRoutes | 0 | packets dropped for lack of a route |
| Ip.ReasmFails | 0 | |
| Ip6.InNoRoutes | 0 | |
| Ip6.OutNoRoutes | 0 | |
| Ip6.InDiscards | 0 | |
| Ip6.InAddrErrors | 0 | |
| Udp6.InErrors | 0 | |
| Udp6.RcvbufErrors | 0 | |
| IpExt.InNoRoutes | 0 |
Softnet, per CPU
| CPU | Processed | Dropped | Time squeeze | RPS received | Flow limit |
|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1001 | 0 | 0 | 0 | 0 |
Softnet counters are host-wide, not per namespace. Drops mean the input backlog (net.core.netdev_max_backlog) overflowed; time squeeze means the CPU ran out of budget with packets left.
All counters
Ip (20)
Forwarding2
DefaultTTL64
InReceives0
InHdrErrors0
InAddrErrors0
ForwDatagrams0
InUnknownProtos0
InDiscards0
InDelivers0
OutRequests0
OutDiscards0
OutNoRoutes0
ReasmTimeout0
ReasmReqds0
ReasmOKs0
ReasmFails0
FragOKs0
FragFails0
FragCreates0
OutTransmits0
Icmp (29)
InMsgs0
InErrors0
InCsumErrors0
InDestUnreachs0
InTimeExcds0
InParmProbs0
InSrcQuenchs0
InRedirects0
InEchos0
InEchoReps0
InTimestamps0
InTimestampReps0
InAddrMasks0
InAddrMaskReps0
OutMsgs0
OutErrors0
OutRateLimitGlobal0
OutRateLimitHost0
OutDestUnreachs0
OutTimeExcds0
OutParmProbs0
OutSrcQuenchs0
OutRedirects0
OutEchos0
OutEchoReps0
OutTimestamps0
OutTimestampReps0
OutAddrMasks0
OutAddrMaskReps0
Tcp (14)
RtoAlgorithm1
RtoMin200
RtoMax120000
ActiveOpens1
PassiveOpens1
AttemptFails0
EstabResets0
CurrEstab2
InSegs800
OutSegs674
RetransSegs0
InErrs0
OutRsts0
InCsumErrors0
Udp (9)
InDatagrams0
NoPorts0
InErrors0
OutDatagrams0
RcvbufErrors0
SndbufErrors0
InCsumErrors0
IgnoredMulti0
MemErrors0
UdpLite (9)
InDatagrams0
NoPorts0
InErrors0
OutDatagrams0
RcvbufErrors0
SndbufErrors0
InCsumErrors0
IgnoredMulti0
MemErrors0
TcpExt (135)
SyncookiesSent0
SyncookiesRecv0
SyncookiesFailed0
EmbryonicRsts0
PruneCalled0
RcvPruned0
OfoPruned0
OutOfWindowIcmps0
LockDroppedIcmps0
ArpFilter0
TW0
TWRecycled0
TWKilled0
PAWSActive0
PAWSEstab0
BeyondWindow0
TSEcrRejected0
PAWSOldAck0
PAWSTimewait0
DelayedACKs0
DelayedACKLocked0
DelayedACKLost0
ListenOverflows0
ListenDrops0
TCPHPHits0
TCPPureAcks40
TCPHPAcks269
TCPRenoRecovery0
TCPSackRecovery0
TCPSACKReneging0
TCPSACKReorder0
TCPRenoReorder0
TCPTSReorder0
TCPFullUndo0
TCPPartialUndo0
TCPDSACKUndo0
TCPLossUndo0
TCPLostRetransmit0
TCPRenoFailures0
TCPSackFailures0
TCPLossFailures0
TCPFastRetrans0
TCPSlowStartRetrans0
TCPTimeouts0
TCPLossProbes0
TCPLossProbeRecovery0
TCPRenoRecoveryFail0
TCPSackRecoveryFail0
TCPRcvCollapsed0
TCPBacklogCoalesce0
TCPDSACKOldSent0
TCPDSACKOfoSent0
TCPDSACKRecv0
TCPDSACKOfoRecv0
TCPAbortOnData0
TCPAbortOnClose0
TCPAbortOnMemory0
TCPAbortOnTimeout0
TCPAbortOnLinger0
TCPAbortFailed0
TCPMemoryPressures0
TCPMemoryPressuresChrono0
TCPSACKDiscard0
TCPDSACKIgnoredOld0
TCPDSACKIgnoredNoUndo0
TCPSpuriousRTOs0
TCPMD5NotFound0
TCPMD5Unexpected0
TCPMD5Failure0
TCPSackShifted0
TCPSackMerged0
TCPSackShiftFallback0
TCPBacklogDrop0
PFMemallocDrop0
TCPMinTTLDrop0
TCPDeferAcceptDrop0
IPReversePathFilter0
TCPTimeWaitOverflow0
TCPReqQFullDoCookies0
TCPReqQFullDrop0
TCPRetransFail0
TCPRcvCoalesce0
TCPOFOQueue0
TCPOFODrop0
TCPOFOMerge0
TCPChallengeACK0
TCPSYNChallenge0
TCPFastOpenActive0
TCPFastOpenActiveFail0
TCPFastOpenPassive0
TCPFastOpenPassiveFail0
TCPFastOpenListenOverflow0
TCPFastOpenCookieReqd0
TCPFastOpenBlackhole0
TCPSpuriousRtxHostQueues0
BusyPollRxPackets0
TCPAutoCorking0
TCPFromZeroWindowAdv0
TCPToZeroWindowAdv0
TCPWantZeroWindowAdv0
TCPSynRetrans0
TCPOrigDataSent489
TCPHystartTrainDetect0
TCPHystartTrainCwnd0
TCPHystartDelayDetect0
TCPHystartDelayCwnd0
TCPACKSkippedSynRecv0
TCPACKSkippedPAWS0
TCPACKSkippedSeq0
TCPACKSkippedFinWait20
TCPACKSkippedTimeWait0
TCPACKSkippedChallenge0
TCPWinProbe0
TCPKeepAlive0
TCPMTUPFail0
TCPMTUPSuccess0
TCPDelivered490
TCPDeliveredCE0
TCPAckCompressed0
TCPZeroWindowDrop0
TCPRcvQDrop0
TCPWqueueTooBig0
TCPFastOpenPassiveAltKey0
TcpTimeoutRehash0
TcpDuplicateDataRehash0
TCPDSACKRecvSegs0
TCPDSACKIgnoredDubious0
TCPMigrateReqSuccess0
TCPMigrateReqFailure0
TCPPLBRehash0
TCPAORequired0
TCPAOBad0
TCPAOKeyNotFound0
TCPAOGood0
TCPAODroppedIcmps0
IpExt (18)
InNoRoutes0
InTruncatedPkts0
InMcastPkts0
OutMcastPkts0
InBcastPkts0
OutBcastPkts0
InOctets0
OutOctets0
InMcastOctets0
OutMcastOctets0
InBcastOctets0
OutBcastOctets0
InCsumErrors0
InNoECTPkts0
InECT1Pkts0
InECT0Pkts0
InCEPkts0
ReasmOverlaps0
Ip6 (33)
InReceives1001
InHdrErrors0
InTooBigErrors0
InNoRoutes0
InAddrErrors0
InUnknownProtos0
InTruncatedPkts0
InDiscards0
InDelivers997
OutForwDatagrams0
OutRequests863
OutDiscards0
OutNoRoutes0
ReasmTimeout0
ReasmReqds0
ReasmOKs0
ReasmFails0
FragOKs0
FragFails0
FragCreates0
InMcastPkts17
OutMcastPkts8
InOctets146429
OutOctets207700
InMcastOctets1480
OutMcastOctets624
InBcastOctets0
OutBcastOctets0
InNoECTPkts1001
InECT1Pkts0
InECT0Pkts0
InCEPkts0
OutTransmits863
Icmp6 (43)
InMsgs197
InErrors0
OutMsgs191
OutErrors0
InCsumErrors0
OutRateLimitHost0
InDestUnreachs0
InPktTooBigs0
InTimeExcds0
InParmProblems0
InEchos0
InEchoReplies0
InGroupMembQueries0
InGroupMembResponses0
InGroupMembReductions0
InRouterSolicits0
InRouterAdvertisements13
InNeighborSolicits125
InNeighborAdvertisements59
InRedirects0
InMLDv2Reports0
OutDestUnreachs0
OutPktTooBigs0
OutTimeExcds0
OutParmProblems0
OutEchos0
OutEchoReplies0
OutGroupMembQueries0
OutGroupMembResponses0
OutGroupMembReductions0
OutRouterSolicits3
OutRouterAdvertisements0
OutNeighborSolicits59
OutNeighborAdvertisements125
OutRedirects0
OutMLDv2Reports4
InType13413
InType135125
InType13659
OutType1333
OutType13559
OutType136125
OutType1434
Udp6 (9)
InDatagrams0
NoPorts0
InErrors0
OutDatagrams0
RcvbufErrors0
SndbufErrors0
InCsumErrors0
IgnoredMulti0
MemErrors0
UdpLite6 (8)
InDatagrams0
NoPorts0
InErrors0
OutDatagrams0
RcvbufErrors0
SndbufErrors0
InCsumErrors0
MemErrors0