磊宇堂我的笔记 2022-03-28

监视网络接口数据

监视网络接口TCP状态信息数据有多种工具或命令。下面举例一些：

nstat命令

# nstat #kernel IpInReceives 9733104 0.0 IpInDelivers 9733102 0.0 IpOutRequests 9058593 0.0 IcmpInErrors 2147 0.0 IcmpInCsumErrors 1143 0.0 IcmpInDestUnreachs 2 0.0 IcmpInTimeExcds 1361 0.0 IcmpInParmProbs 56 0.0 IcmpInRedirects 1 0.0 IcmpInEchoReps 701 0.0 IcmpInTimestamps 26 0.0 IcmpOutErrors 750 0.0 IcmpOutTimeExcds 23 0.0 IcmpOutEchoReps 26 0.0 IcmpOutTimestamps 701 0.0 IcmpMsgInType0 26 0.0 IcmpMsgInType3 1361 0.0 IcmpMsgInType4 1 0.0 IcmpMsgInType8 701 0.0 IcmpMsgInType11 56 0.0 IcmpMsgOutType0 701 0.0 IcmpMsgOutType3 23 0.0 IcmpMsgOutType8 26 0.0 TcpActiveOpens 678940 0.0 TcpPassiveOpens 910289 0.0 TcpAttemptFails 58018 0.0 TcpEstabResets 14608 0.0 TcpInSegs 9686518 0.0 TcpOutSegs 9038288 0.0 TcpRetransSegs 6700 0.0 TcpInErrs 47 0.0 TcpOutRsts 67249 0.0 UdpInDatagrams 44409 0.0 UdpNoPorts 23 0.0 UdpOutDatagrams 44441 0.0 Ip6InReceives 6 0.0 Ip6InNoRoutes 6 0.0 Ip6OutRequests 9 0.0 Ip6OutNoRoutes 3948 0.0 Ip6OutMcastPkts 14 0.0 Ip6InOctets 432 0.0 Ip6OutOctets 612 0.0 Ip6OutMcastOctets 992 0.0 Ip6InNoECTPkts 6 0.0 Icmp6OutMsgs 9 0.0 Icmp6OutRouterSolicits 3 0.0 Icmp6OutNeighborSolicits 1 0.0 Icmp6OutMLDv2Reports 5 0.0 Icmp6OutType133 3 0.0 Icmp6OutType135 1 0.0 Icmp6OutType143 5 0.0 TcpExtSyncookiesFailed 140 0.0 TcpExtEmbryonicRsts 704 0.0 TcpExtPruneCalled 23 0.0 TcpExtTW 615681 0.0 TcpExtPAWSEstab 20 0.0 TcpExtDelayedACKs 52123 0.0 TcpExtDelayedACKLocked 44 0.0 TcpExtDelayedACKLost 1518 0.0 TcpExtListenDrops 32 0.0 TcpExtTCPPrequeued 19258 0.0 TcpExtTCPDirectCopyFromBacklog 45185 0.0 TcpExtTCPDirectCopyFromPrequeue 394312 0.0 TcpExtTC<a href=”http://www.ttlsa.com/php/” title=”php”target=”_blank”>PHP</a>Hits 943072 0.0 TcpExtTCPHPHitsToUser 3478 0.0 TcpExtTCPPureAcks 3242625 0.0 TcpExtTCPHPAcks 547259 0.0 TcpExtTCPSackRecovery 650 0.0 TcpExtTCPFACKReorder 1 0.0 TcpExtTCPSACKReorder 8 0.0 TcpExtTCPTSReorder 23 0.0 TcpExtTCPFullUndo 1 0.0 TcpExtTCPPartialUndo 23 0.0 TcpExtTCPDSACKUndo 1 0.0 TcpExtTCPLossUndo 854 0.0 TcpExtTCPLostRetransmit 162 0.0 TcpExtTCPSackFailures 135 0.0 TcpExtTCPLossFailures 18 0.0 TcpExtTCPFastRetrans 1517 0.0 TcpExtTCPForwardRetrans 104 0.0 TcpExtTCPSlowStartRetrans 172 0.0 TcpExtTCPTimeouts 2764 0.0 TcpExtTCPLossProbes 5201 0.0 TcpExtTCPLossProbeRecovery 2858 0.0 TcpExtTCPSackRecoveryFail 74 0.0 TcpExtTCPRcvCollapsed 460 0.0 TcpExtTCPDSACKOldSent 1645 0.0 TcpExtTCPDSACKOfoSent 21 0.0 TcpExtTCPDSACKRecv 879 0.0 TcpExtTCPAbortOnData 4314 0.0 TcpExtTCPAbortOnClose 346 0.0 TcpExtTCPAbortOnTimeout 186 0.0 TcpExtTCPDSACKIgnoredNoUndo 615 0.0 TcpExtTCPSpuriousRTOs 95 0.0 TcpExtTCPSackShifted 402 0.0 TcpExtTCPSackMerged 2048 0.0 TcpExtTCPSackShiftFallback 2592 0.0 TcpExtTCPRcvCoalesce 145162 0.0 TcpExtTCPOFOQueue 36672 0.0 TcpExtTCPOFOMerge 21 0.0 TcpExtTCPChallengeACK 329 0.0 TcpExtTCPSYNChallenge 47 0.0 IpExtInNoRoutes 2 0.0 IpExtInOctets 1568628267 0.0 IpExtOutOctets 1158526375 0.0 IpExtInNoECTPkts 9828130 0.0 IpExtInECT0Pkts 10 0.0 IpExtInCEPkts 3 0.0

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# nstat #kernel IpInReceives 9733104 0.0 IpInDelivers 9733102 0.0 IpOutRequests 9058593 0.0 IcmpInErrors 2147 0.0 IcmpInCsumErrors 1143 0.0 IcmpInDestUnreachs 2 0.0 IcmpInTimeExcds 1361 0.0 IcmpInParmProbs 56 0.0 IcmpInRedirects 1 0.0 IcmpInEchoReps 701 0.0 IcmpInTimestamps 26 0.0 IcmpOutErrors 750 0.0 IcmpOutTimeExcds 23 0.0 IcmpOutEchoReps 26 0.0 IcmpOutTimestamps 701 0.0 IcmpMsgInType0 26 0.0 IcmpMsgInType3 1361 0.0 IcmpMsgInType4 1 0.0 IcmpMsgInType8 701 0.0 IcmpMsgInType11 56 0.0 IcmpMsgOutType0 701 0.0 IcmpMsgOutType3 23 0.0 IcmpMsgOutType8 26 0.0 TcpActiveOpens 678940 0.0 TcpPassiveOpens 910289 0.0 TcpAttemptFails 58018 0.0 TcpEstabResets 14608 0.0 TcpInSegs 9686518 0.0 TcpOutSegs 9038288 0.0 TcpRetransSegs 6700 0.0 TcpInErrs 47 0.0 TcpOutRsts 67249 0.0 UdpInDatagrams 44409 0.0 UdpNoPorts 23 0.0 UdpOutDatagrams 44441 0.0 Ip6InReceives 6 0.0 Ip6InNoRoutes 6 0.0 Ip6OutRequests 9 0.0 Ip6OutNoRoutes 3948 0.0 Ip6OutMcastPkts 14 0.0 Ip6InOctets 432 0.0 Ip6OutOctets 612 0.0 Ip6OutMcastOctets 992 0.0 Ip6InNoECTPkts 6 0.0 Icmp6OutMsgs 9 0.0 Icmp6OutRouterSolicits 3 0.0 Icmp6OutNeighborSolicits 1 0.0 Icmp6OutMLDv2Reports 5 0.0 Icmp6OutType133 3 0.0 Icmp6OutType135 1 0.0 Icmp6OutType143 5 0.0 TcpExtSyncookiesFailed 140 0.0 TcpExtEmbryonicRsts 704 0.0 TcpExtPruneCalled 23 0.0 TcpExtTW 615681 0.0 TcpExtPAWSEstab 20 0.0 TcpExtDelayedACKs 52123 0.0 TcpExtDelayedACKLocked 44 0.0 TcpExtDelayedACKLost 1518 0.0 TcpExtListenDrops 32 0.0 TcpExtTCPPrequeued 19258 0.0 TcpExtTCPDirectCopyFromBacklog 45185 0.0 TcpExtTCPDirectCopyFromPrequeue 394312 0.0 TcpExtTCPHPHits 943072 0.0 TcpExtTCPHPHitsToUser 3478 0.0 TcpExtTCPPureAcks 3242625 0.0 TcpExtTCPHPAcks 547259 0.0 TcpExtTCPSackRecovery 650 0.0 TcpExtTCPFACKReorder 1 0.0 TcpExtTCPSACKReorder 8 0.0 TcpExtTCPTSReorder 23 0.0 TcpExtTCPFullUndo 1 0.0 TcpExtTCPPartialUndo 23 0.0 TcpExtTCPDSACKUndo 1 0.0 TcpExtTCPLossUndo 854 0.0 TcpExtTCPLostRetransmit 162 0.0 TcpExtTCPSackFailures 135 0.0 TcpExtTCPLossFailures 18 0.0 TcpExtTCPFastRetrans 1517 0.0 TcpExtTCPForwardRetrans 104 0.0 TcpExtTCPSlowStartRetrans 172 0.0 TcpExtTCPTimeouts 2764 0.0 TcpExtTCPLossProbes 5201 0.0 TcpExtTCPLossProbeRecovery 2858 0.0 TcpExtTCPSackRecoveryFail 74 0.0 TcpExtTCPRcvCollapsed 460 0.0 TcpExtTCPDSACKOldSent 1645 0.0 TcpExtTCPDSACKOfoSent 21 0.0 TcpExtTCPDSACKRecv 879 0.0 TcpExtTCPAbortOnData 4314 0.0 TcpExtTCPAbortOnClose 346 0.0 TcpExtTCPAbortOnTimeout 186 0.0 TcpExtTCPDSACKIgnoredNoUndo 615 0.0 TcpExtTCPSpuriousRTOs 95 0.0 TcpExtTCPSackShifted 402 0.0 TcpExtTCPSackMerged 2048 0.0 TcpExtTCPSackShiftFallback 2592 0.0 TcpExtTCPRcvCoalesce 145162 0.0 TcpExtTCPOFOQueue 36672 0.0 TcpExtTCPOFOMerge 21 0.0 TcpExtTCPChallengeACK 329 0.0 TcpExtTCPSYNChallenge 47 0.0 IpExtInNoRoutes 2 0.0 IpExtInOctets 1568628267 0.0 IpExtOutOctets 1158526375 0.0 IpExtInNoECTPkts 9828130 0.0 IpExtInECT0Pkts 10 0.0 IpExtInCEPkts 3 0.0

ss命令

# ss -s Total: 319 (kernel 752) TCP: 187 (estab 114, closed 58, orphaned 0, synrecv 0, timewait 58/0), ports 0 Transport Total IP IPv6 * 752 – – RAW 0 0 0 UDP 3 2 1 TCP 129 113 16 INET 132 115 17 FRAG 0 0 0

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# ss -s Total : 319 ( kernel 752 ) TCP : 187 ( estab 114 , closed 58 , orphaned 0 , synrecv 0 , timewait 58 / 0 ) , ports 0 Transport Total IP IPv6 * 752 – – RAW 0 0 0 UDP 3 2 1 TCP 129 113 16 INET 132 115 17 FRAG 0 0 0

netstat命令

# netstat -i Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 9001 0 2194916 0 0 0 1424609 0 0 0 BMRU lo 65536 0 7670598 0 0 0 7670598 0 0 0 LRU

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# netstat -i Kernel Interface table Iface MTU Met RX – OK RX – ERR RX – DRP RX – OVR TX – OK TX – ERR TX – DRP TX – OVR Flg eth0 9001 0 2194916 0 0 0 1424609 0 0 0 BMRU lo 65536 0 7670598 0 0 0 7670598 0 0 0 LRU

# netstat -s Ip: 9743496 total packets received 0 forwarded 0 incoming packets discarded 9743494 incoming packets delivered 9068146 requests sent out Icmp: 2147 ICMP messages received 1143 input ICMP message failed. InCsumErrors: 2 ICMP input histogram: destination unreachable: 1361 timeout in transit: 56 source quenches: 1 echo requests: 701 echo replies: 26 750 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 23 echo request: 26 echo replies: 701 IcmpMsg: InType0: 26 InType3: 1361 InType4: 1 InType8: 701 InType11: 56 OutType0: 701 OutType3: 23 OutType8: 26 Tcp: 679665 active connections openings 911387 passive connection openings 58018 failed connection attempts 14608 connection resets received 118 connections established 9696894 segments received 9047825 segments send out 6700 segments retransmited 47 bad segments received. 67249 resets sent Udp: 44425 packets received 23 packets to unknown port received. 0 packet receive errors 44457 packets sent UdpLite: TcpExt: 140 invalid SYN cookies received 704 resets received for embryonic SYN_RECV sockets 23 packets pruned from receive queue because of socket buffer overrun 616402 TCP sockets finished time wait in fast timer 20 packets rejects in established connections because of timestamp 52124 delayed acks sent 45 delayed acks further delayed because of locked socket Quick ack mode was activated 1519 times 32 SYNs to LISTEN sockets dropped 19258 packets directly queued to recvmsg prequeue. 45185 bytes directly in process context from backlog 394312 bytes directly received in process context from prequeue 943942 packet headers predicted 3478 packets header predicted and directly queued to user 3246338 acknowledgments not containing data payload received 547737 predicted acknowledgments 650 times recovered from packet loss by selective acknowledgements Detected reordering 1 times using FACK Detected reordering 8 times using SACK Detected reordering 23 times using time stamp 1 congestion <a href=”http://www.ttlsa.com/windows/” title=”windows”target=”_blank”>windows</a> fully recovered without slow start 23 congestion windows partially recovered using Hoe heuristic 1 congestion windows recovered without slow start by DSACK 854 congestion windows recovered without slow start after partial ack TCPLostRetransmit: 162 135 timeouts after SACK recovery 18 timeouts in loss state 1517 fast retransmits 104 forward retransmits 172 retransmits in slow start 2764 other TCP timeouts TCPLossProbes: 5202 TCPLossProbeRecovery: 2859 74 SACK retransmits failed 460 packets collapsed in receive queue due to low socket buffer 1646 DSACKs sent for old packets 21 DSACKs sent for out of order packets 879 DSACKs received 4314 connections reset due to unexpected data 346 connections reset due to early user close 186 connections aborted due to timeout TCPDSACKIgnoredNoUndo: 615 TCPSpuriousRTOs: 95 TCPSackShifted: 402 TCPSackMerged: 2048 TCPSackShiftFallback: 2592 TCPRcvCoalesce: 145187 TCPOFOQueue: 36673 TCPOFOMerge: 21 TCPChallengeACK: 329 TCPSYNChallenge: 47 IpExt: InNoRoutes: 2 InOctets: 1570012766 OutOctets: 1159491497 InNoECTPkts: 9838700 InECT0Pkts: 10 InCEPkts: 3

# netstat -s Ip : 9743496 total packets received 0 forwarded 0 incoming packets discarded 9743494 incoming packets delivered 9068146 requests sent out Icmp : 2147 ICMP messages received 1143 input ICMP message failed . InCsumErrors : 2 ICMP input histogram : destination unreachable : 1361 timeout in transit : 56 source quenches : 1 echo requests : 701 echo replies : 26 750 ICMP messages sent 0 ICMP messages failed ICMP output histogram : destination unreachable : 23 echo request : 26 echo replies : 701 IcmpMsg : InType0 : 26 InType3 : 1361 InType4 : 1 InType8 : 701 InType11 : 56 OutType0 : 701 OutType3 : 23 OutType8 : 26 Tcp : 679665 active connections openings 911387 passive connection openings 58018 failed connection attempts 14608 connection resets received 118 connections established 9696894 segments received 9047825 segments send out 6700 segments retransmited 47 bad segments received . 67249 resets sent Udp : 44425 packets received 23 packets to unknown port received . 0 packet receive errors 44457 packets sent UdpLite : TcpExt : 140 invalid SYN cookies received 704 resets received for embryonic SYN_RECV sockets 23 packets pruned from receive queue because of socket buffer overrun 616402 TCP sockets finished time wait in fast timer 20 packets rejects in established connections because of timestamp 52124 delayed acks sent 45 delayed acks further delayed because of locked socket Quick ack mode was activated 1519 times 32 SYNs to LISTEN sockets dropped 19258 packets directly queued to recvmsg prequeue . 45185 bytes directly in process context from backlog 394312 bytes directly received in process context from prequeue 943942 packet headers predicted 3478 packets header predicted and directly queued to user 3246338 acknowledgments not containing data payload received 547737 predicted acknowledgments 650 times recovered from packet loss by selective acknowledgements Detected reordering 1 times using FACK Detected reordering 8 times using SACK Detected reordering 23 times using time stamp 1 congestion windows fully recovered without slow start 23 congestion windows partially recovered using Hoe heuristic 1 congestion windows recovered without slow start by DSACK 854 congestion windows recovered without slow start after partial ack TCPLostRetransmit : 162 135 timeouts after SACK recovery 18 timeouts in loss state 1517 fast retransmits 104 forward retransmits 172 retransmits in slow start 2764 other TCP timeouts TCPLossProbes : 5202 TCPLossProbeRecovery : 2859 74 SACK retransmits failed 460 packets collapsed in receive queue due to low socket buffer 1646 DSACKs sent for old packets 21 DSACKs sent for out of order packets 879 DSACKs received 4314 connections reset due to unexpected data 346 connections reset due to early user close 186 connections aborted due to timeout TCPDSACKIgnoredNoUndo : 615 TCPSpuriousRTOs : 95 TCPSackShifted : 402 TCPSackMerged : 2048 TCPSackShiftFallback : 2592 TCPRcvCoalesce : 145187 TCPOFOQueue : 36673 TCPOFOMerge : 21 TCPChallengeACK : 329 TCPSYNChallenge : 47 IpExt : InNoRoutes : 2 InOctets : 1570012766 OutOctets : 1159491497 InNoECTPkts : 9838700 InECT0Pkts : 10 InCEPkts : 3

ip命令

# ip -s link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 RX: bytes packets errors dropped overrun mcast 883395575 7672258 0 0 0 0 TX: bytes packets errors dropped carrier collsns 883395575 7672258 0 0 0 0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 02:7a:7d:d2:f7:21 brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 694754381 2197268 0 0 0 0 TX: bytes packets errors dropped carrier collsns 296980409 1425257 0 0 0 0

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# ip -s link 1 : lo : < LOOPBACK , UP , LOWER_UP > mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link / loopback 00 : 00 : 00 : 00 : 00 : 00 brd 00 : 00 : 00 : 00 : 00 : 00 RX : bytes packets errors dropped overrun mcast 883395575 7672258 0 0 0 0 TX : bytes packets errors dropped carrier collsns 883395575 7672258 0 0 0 0 2 : eth0 : < BROADCAST , MULTICAST , UP , LOWER_UP > mtu 9001 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link / ether 02 : 7a : 7d : d2 : f7 : 21 brd ff : ff : ff : ff : ff : ff RX : bytes packets errors dropped overrun mcast 694754381 2197268 0 0 0 0 TX : bytes packets errors dropped carrier collsns 296980409 1425257 0 0 0 0

sar命令

# sar -n DEV 1 <a href=”http://www.ttlsa.com/linux/” title=”linux”target=”_blank”>Linux</a> 3.13.0-48-generic (beta) 2015年08月17日 _x86_64_ (4 CPU) 14时46分54秒 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 14时46分55秒 eth0 12.00 5.00 0.97 1.18 0.00 0.00 0.00 0.00 14时46分55秒 lo 10.00 10.00 1.00 1.00 0.00 0.00 0.00 0.00 14时46分55秒 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 14时46分56秒 eth0 1.00 1.00 0.05 0.47 0.00 0.00 0.00 0.00 14时46分56秒 lo 16.00 16.00 2.17 2.17 0.00 0.00 0.00 0.00 14时46分56秒 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 14时46分57秒 eth0 5.00 3.00 0.26 0.61 0.00 0.00 0.00 0.00 14时46分57秒 lo 10.00 10.00 1.00 1.00 0.00 0.00 0.00 0.00

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# sar -n DEV 1 Linux 3.13.0 – 48 – generic ( beta ) 2015年 08月 17日 _x86_64_ ( 4 CPU ) 14时 46分 54秒 IFACE rxpck / s txpck / s rxkB / s txkB / s rxcmp / s txcmp / s rxmcst / s % ifutil 14时 46分 55秒 eth0 12.00 5.00 0.97 1.18 0.00 0.00 0.00 0.00 14时 46分 55秒 lo 10.00 10.00 1.00 1.00 0.00 0.00 0.00 0.00 14时 46分 55秒 IFACE rxpck / s txpck / s rxkB / s txkB / s rxcmp / s txcmp / s rxmcst / s % ifutil 14时 46分 56秒 eth0 1.00 1.00 0.05 0.47 0.00 0.00 0.00 0.00 14时 46分 56秒 lo 16.00 16.00 2.17 2.17 0.00 0.00 0.00 0.00 14时 46分 56秒 IFACE rxpck / s txpck / s rxkB / s txkB / s rxcmp / s txcmp / s rxmcst / s % ifutil 14时 46分 57秒 eth0 5.00 3.00 0.26 0.61 0.00 0.00 0.00 0.00 14时 46分 57秒 lo 10.00 10.00 1.00 1.00 0.00 0.00 0.00 0.00

还有其它工具如nload，iftop等等，不一一列举了。

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