Rack of Ethernet switches.

How To Read  netstat -s  Output

How To Read netstat -s

The output of netstat varies from one operating system to the next. This variation goes beyond Linux versus Solaris, different releases of the same kernel will have slightly data structures. Even the same kernel release will gain networking data structures when kernel modules are loaded.

The -s option is intended to mean "statistics", but "counters" is a far better explanation of what you see.

Jump to:

Linux 3.11.6 Linux 3.5.3 Linux 2.6.33 Linux 2.6.24

OpenBSD 5.4 OpenBSD 5.1 OpenBSD 4.5

SunOS 5.10

Cisco IOS

Historical Examples:

Linux 2.0.34

SunOS 4.1.1 SunOS 5.3

Linux

Linux 3.11.6 kernel

Ip:
    10186913 total packets received
    4572649 forwarded
    0 incoming packets discarded
    5586516 incoming packets delivered
    8731045 requests sent out
    1475 reassemblies required
    686 packets reassembled ok
    9 fragments received ok
    497 fragments failed
    26 fragments created
Icmp:
    2707 ICMP messages received
    94 input ICMP message failed.
    InCsumErrors: 22
    ICMP input histogram:
        destination unreachable: 2505
        timeout in transit: 168
        echo requests: 12
    28928 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 28914
        echo request: 2
        echo replies: 12
IcmpMsg:
        InType3: 2505
        InType8: 12
        InType11: 168
        OutType0: 12
        OutType3: 28914
        OutType8: 2
Tcp:
    72751 active connections openings
    150275 passive connection openings
    8389 failed connection attempts
    2543 connection resets received
    7 connections established
    5435862 segments received
    4377999 segments send out
    108568 segments retransmited
    227 bad segments received.
    428135 resets sent
    InCsumErrors: 5
Udp:
    119466 packets received
    28417 packets to unknown port received.
    1 packet receive errors
    107657 packets sent
    InCsumErrors: 1
UdpLite:
TcpExt:
    273808 invalid SYN cookies received
    1593 resets received for embryonic SYN_RECV sockets
    1 packets pruned from receive queue because of socket buffer overrun
    26264 TCP sockets finished time wait in fast timer
    37 active connections rejected because of time stamp
    56 packets rejects in established connections because of timestamp
    42475 delayed acks sent
    33 delayed acks further delayed because of locked socket
    Quick ack mode was activated 4888 times
    1 SYNs to LISTEN sockets ignored
    796 packets directly queued to recvmsg prequeue.
    2071380 packets directly received from prequeue
    3568259 packets header predicted
    458 packets header predicted and directly queued to user
    604767 acknowledgments not containing data received
    319995 predicted acknowledgments
    13332 times recovered from packet loss due to SACK data
    3 bad SACKs received
    Detected reordering 1 times using FACK
    Detected reordering 30 times using time stamp
    4 congestion windows fully recovered
    30 congestion windows partially recovered using Hoe heuristic
    TCPDSACKUndo: 32
    5015 congestion windows recovered after partial ack
    TCPLostRetransmit: 980
    3402 timeouts after SACK recovery
    541 timeouts in loss state
    16957 fast retransmits
    114 forward retransmits
    4426 retransmits in slow start
    47181 other TCP timeouts
    TCPLossProbes: 2693
    TCPLossProbeRecovery: 345
    3260 sack retransmits failed
    8 packets collapsed in receive queue due to low socket buffer
    6719 DSACKs sent for old packets
    4807 DSACKs received
    32 DSACKs for out of order packets received
    59801 connections reset due to unexpected data
    54336 connections reset due to early user close
    1046 connections aborted due to timeout
    TCPSACKDiscard: 1
    TCPDSACKIgnoredOld: 760
    TCPDSACKIgnoredNoUndo: 2672
    TCPSpuriousRTOs: 4162
    TCPSackShifted: 12297
    TCPSackMerged: 27025
    TCPSackShiftFallback: 26774
    IPReversePathFilter: 1
    TCPRcvCoalesce: 1266536
    TCPOFOQueue: 28540
    TCPChallengeACK: 362
    TCPSYNChallenge: 314
IpExt:
    InNoRoutes: 2
    InBcastPkts: 12339
    OutBcastPkts: 11
    InOctets: 2084107878
    OutOctets: 338026673
    InBcastOctets: 4059430
    OutBcastOctets: 505

Linux 3.5.3 kernel

Ip:
    3086637 total packets received
    13 with invalid addresses
    58535 forwarded
    0 incoming packets discarded
    3004099 incoming packets delivered
    3046249 requests sent out
    4884 outgoing packets dropped
    604 reassemblies required
    298 packets reassembled ok
Icmp:
    19 ICMP messages received
    1 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 18
        timeout in transit: 1
    110 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 110
IcmpMsg:
        InType3: 18
        InType11: 1
        OutType3: 110
Tcp:
    20144 active connections openings
    1890 passive connection openings
    24 failed connection attempts
    807 connection resets received
    5 connections established
    2844774 segments received
    2864999 segments send out
    666 segments retransmited
    0 bad segments received.
    1436 resets sent
Udp:
    191424 packets received
    110 packets to unknown port received.
    0 packet receive errors
    126296 packets sent
UdpLite:
TcpExt:
    8702 TCP sockets finished time wait in fast timer
    27501 delayed acks sent
    11 delayed acks further delayed because of locked socket
    Quick ack mode was activated 212 times
    2765 packets directly queued to recvmsg prequeue.
    3944 packets directly received from backlog
    3454200 packets directly received from prequeue
    1432347 packets header predicted
    2410 packets header predicted and directly queued to user
    1176313 acknowledgments not containing data received
    209063 predicted acknowledgments
    7 times recovered from packet loss due to SACK data
    97 congestion windows recovered after partial ack
    1 timeouts in loss state
    9 fast retransmits
    3 retransmits in slow start
    222 other TCP timeouts
    150 DSACKs sent for old packets
    68 DSACKs sent for out of order packets
    10 DSACKs received
    254 connections reset due to unexpected data
    440 connections reset due to early user close
    64 connections aborted due to timeout
    TCPDSACKIgnoredNoUndo: 3
    TCPSackShifted: 91
    TCPSackMerged: 40
    TCPSackShiftFallback: 41
    IPReversePathFilter: 3
    TCPRcvCoalesce: 174784
IpExt:
    InMcastPkts: 7196
    OutMcastPkts: 7198
    InBcastPkts: 38018
    OutBcastPkts: 4884
    InOctets: -2130469098
    OutOctets: -1510535438
    InMcastOctets: 2263192
    OutMcastOctets: 2263272
    InBcastOctets: 11839880
    OutBcastOctets: 874238

Linux 2.6.33 kernel

Ip:
    14160127 total packets received
    1 with invalid addresses
    1031595 forwarded
    1 with unknown protocol
    0 incoming packets discarded
    12823997 incoming packets delivered
    12175893 requests sent out
    40141 outgoing packets dropped
    1 fragments dropped after timeout
    16953 reassemblies required
    8476 packets reassembled ok
    1 packet reassembles failed
Icmp:
    883 ICMP messages received
    44 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 827
        timeout in transit: 28
        source quenches: 1
        echo requests: 27
    4052 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 4021
        echo request: 4
        echo replies: 27
IcmpMsg:
        InType3: 827
        InType4: 1
        InType8: 27
        InType11: 28
        OutType0: 27
        OutType3: 4021
        OutType8: 4
Tcp:
    399848 active connections openings
    248057 passive connection openings
    1201 failed connection attempts
    1462 connection resets received
    8 connections established
    11460573 segments received
    9916512 segments send out
    13667 segments retransmited
    0 bad segments received.
    25448 resets sent
Udp:
    1417813 packets received
    3663 packets to unknown port received.
    1 packet receive errors
    1210060 packets sent
UdpLite:
TcpExt:
    333665 TCP sockets finished time wait in fast timer
    3 packets rejects in established connections because of timestamp
    211661 delayed acks sent
    96 delayed acks further delayed because of locked socket
    Quick ack mode was activated 4229 times
    74274 packets directly queued to recvmsg prequeue.
    37833 packets directly received from backlog
    102627617 packets directly received from prequeue
    6771097 packets header predicted
    73381 packets header predicted and directly queued to user
    1281123 acknowledgments not containing data received
    1570328 predicted acknowledgments
    3 times recovered from packet loss due to SACK data
    Detected reordering 1 times using time stamp
    2 congestion windows fully recovered
    9 congestion windows partially recovered using Hoe heuristic
    588 congestion windows recovered after partial ack
    0 TCP data loss events
    60 timeouts after SACK recovery
    1 timeouts in loss state
    2 fast retransmits
    2 forward retransmits
    33 retransmits in slow start
    3755 other TCP timeouts
    2 times receiver scheduled too late for direct processing
    3967 DSACKs sent for old packets
    101 DSACKs sent for out of order packets
    115 DSACKs received
    3950 connections reset due to unexpected data
    659 connections reset due to early user close
    2389 connections aborted due to timeout
    TCPDSACKIgnoredOld: 38
    TCPDSACKIgnoredNoUndo: 20
    TCPSackShifted: 2
    TCPSackMerged: 5
    TCPSackShiftFallback: 431
IpExt:
    InMcastPkts: 266515
    OutMcastPkts: 266524
    InBcastPkts: 353235
    OutBcastPkts: 122858
    InOctets: 1402185666
    OutOctets: 2061596738
    InMcastOctets: 57085877
    OutMcastOctets: 57086245
    InBcastOctets: 98229428
    OutBcastOctets: 22241335

Linux 2.6.24 kernel

Ip:
    427117633 total packets received
    25 with invalid headers
    228 with invalid addresses
    0 forwarded
    0 incoming packets discarded
    427117380 incoming packets delivered
    268514658 requests sent out
Icmp:
    837 ICMP messages received
    3 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 570
        timeout in transit: 7
        echo requests: 260
    508 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 248
        echo replies: 260
IcmpMsg:
        InType3: 570
        InType8: 260
        InType11: 7
        OutType0: 260
        OutType3: 248
Tcp:
    1109 active connections openings
    154457 passive connection openings
    876 failed connection attempts
    244 connection resets received
    11 connections established
    424768042 segments received
    267933426 segments send out
    1105 segments retransmited
    0 bad segments received.
    3037 resets sent
Udp:
    1314435 packets received
    232 packets to unknown port received.
    1 packet receive errors
    570387 packets sent
UdpLite:
TcpExt:
    276 resets received for embryonic SYN_RECV sockets
    1308 packets pruned from receive queue because of socket buffer overrun
    516 ICMP packets dropped because they were out-of-window
    4527 TCP sockets finished time wait in fast timer
    2 packets rejects in established connections because of timestamp
    355080 delayed acks sent
    84 delayed acks further delayed because of locked socket
    Quick ack mode was activated 214 times
    137800 packets directly queued to recvmsg prequeue.
    489 bytes directly received in process context from prequeue
    343265897 packet headers predicted
    2339785 acknowledgments not containing data payload received
    127767879 predicted acknowledgments
    81 times recovered from packet loss by selective acknowledgements
    1 congestion windows recovered without slow start by DSACK
    89 congestion windows recovered without slow start after partial ack
    54 TCP data loss events
    35 timeouts after SACK recovery
    228 fast retransmits
    7 forward retransmits
    2 retransmits in slow start
    636 other TCP timeouts
    1897562 packets collapsed in receive queue due to low socket buffer
    215 DSACKs sent for old packets
    1 DSACKs sent for out of order packets
    144 DSACKs received
    101 connections reset due to unexpected data
    44 connections reset due to early user close
    9 connections aborted due to timeout
    TCPDSACKIgnoredOld: 46
    TCPDSACKIgnoredNoUndo: 25
    TCPSpuriousRTOs: 2
IpExt:
    InMcastPkts: 646981
    OutMcastPkts: 40789
    InBcastPkts: 1525325

OpenBSD

OpenBSD 5.4

ip:
	9120279 total packets received
	0 bad header checksums
	0 with size smaller than minimum
	0 with data size < data length
	0 with header length < data size
	0 with data length < header length
	0 with bad options
	0 with incorrect version number
	0 fragments received
	0 fragments dropped (duplicates or out of space)
	0 malformed fragments dropped
	0 fragments dropped after timeout
	0 packets reassembled ok
	9119862 packets for this host
	416 packets for unknown/unsupported protocol
	0 packets forwarded
	0 packets not forwardable
	0 redirects sent
	9442080 packets sent from this host
	2 packets sent with fabricated ip header
	0 output packets dropped due to no bufs, etc.
	0 output packets discarded due to no route
	0 output datagrams fragmented
	0 fragments created
	0 datagrams that can't be fragmented
	0 fragment floods
	0 packets with ip length > max ip packet size
	0 tunneling packets that can't find gif
	0 datagrams with bad address in header
	2184118 input datagrams checksum-processed by hardware
	2505639 output datagrams checksum-processed by hardware
	0 multicast packets which we don't join
icmp:
	0 calls to icmp_error
	0 errors not generated because old message was icmp
	0 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	0 echo requests to broadcast/multicast rejected
	Input packet histogram:
		destination unreachable: 416
	0 message responses generated
igmp:
	0 messages received
	0 messages received with too few bytes
	0 messages received with bad checksum
	0 membership queries received
	0 membership queries received with invalid field(s)
	0 membership reports received
	0 membership reports received with invalid field(s)
	0 membership reports received for groups to which we belong
	0 membership reports sent
ipencap:
	0 total input packets
	0 total output packets
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets with possibly spoofed local addresses
	0 packets were dropped due to full output queue
	0 input bytes
	0 output bytes
	0 protocol family mismatches
	0 attempts to use tunnel with unspecified endpoint(s)
tcp:
	9436474 packets sent
		5790154 data packets (2127707309 bytes)
		1110 data packets (471748 bytes) retransmitted
		0 fast retransmitted packets
		3580690 ack-only packets (1755333 delayed)
		0 URG only packets
		0 window probe packets
		57653 window update packets
		7197 control packets
		2500357 packets hardware-checksummed
	9116842 packets received
		5452319 acks (for 2127524524 bytes)
		3012 duplicate acks
		0 acks for unsent data
		0 acks for old data
		5278417 packets (1386987569 bytes) received in-sequence
		318 completely duplicate packets (92528 bytes)
		0 old duplicate packets
		0 packets with some duplicate data (0 bytes duplicated)
		1174 out-of-order packets (90469 bytes)
		0 packets (0 bytes) of data after window
		0 window probes
		23156 window update packets
		935 packets received after close
		0 discarded for bad checksums
		0 discarded for bad header offset fields
		0 discarded because packet too short
		0 discarded for missing IPsec protection
		0 discarded due to memory shortage
		2180541 packets hardware-checksummed
		0 bad/missing md5 checksums
		0 good md5 checksums
	3332 connection requests
	223 connection accepts
	3385 connections established (including accepts)
	3662 connections closed (including 98 drops)
	0 connections drained
	170 embryonic connections dropped
	5455357 segments updated rtt (of 5334814 attempts)
	502 retransmit timeouts
		39 connections dropped by rexmit timeout
	0 persist timeouts
	237 keepalive timeouts
		69 keepalive probes sent
		6 connections dropped by keepalive
	38401 correct ACK header predictions
	314984 correct data packet header predictions
	2636 PCB cache misses
	0 ECN connections accepted
		0 ECE packets received
		0 CWR packets received
		0 CE packets received
		0 ECT packets sent
		0 ECE packets sent
		0 CWR packets sent
			cwr by fastrecovery: 45
			cwr by timeout: 502
			cwr by ecn: 0
	0 bad connection attempts
	223 SYN cache entries added
		0 hash collisions
		223 completed
		0 aborted (no space to build PCB)
		0 timed out
		0 dropped due to overflow
		0 dropped due to bucket overflow
		0 dropped due to RST
		0 dropped due to ICMP unreachable
	0 SYN,ACKs retransmitted
	0 duplicate SYNs received for entries already in the cache
	0 SYNs dropped (no route or no space)
	45 SACK recovery episodes
		186 segment rexmits in SACK recovery episodes
		135050 byte rexmits in SACK recovery episodes
	1395 SACK options received
	335 SACK options sent
udp:
	3196 datagrams received
	0 with incomplete header
	0 with bad data length field
	0 with bad checksum
	0 with no checksum
	3170 input packets hardware-checksummed
	3168 output packets hardware-checksummed
	0 dropped due to no socket
	16 broadcast/multicast datagrams dropped due to no socket
	0 dropped due to missing IPsec protection
	0 dropped due to full socket buffers
	3180 delivered
	3194 datagrams output
	26 missed PCB cache
esp:
	0 input ESP packets
	0 output ESP packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets with bad encryption received
	0 packets that failed verification received
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 possibly replayed packets received
	0 packets with bad payload size or padding received
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed crypto processing
	0 input UDP encapsulated ESP packets
	0 output UDP encapsulated ESP packets
	0 UDP packets for non-encapsulating TDB received
	0 input bytes
	0 output bytes
ah:
	0 input AH packets
	0 output AH packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets that failed verification received
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 possibly replayed packets received
	0 packets with bad authenticator length received
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed crypto processing
	0 input bytes
	0 output bytes
etherip:
	0 packets shorter than header shows
	0 packets were dropped due to full output queue
	0 packets were dropped because of no interface/bridge information
	0 packets dropped due to policy
	0 packets dropped for other reasons
	0 input ethernet-in-IP packets
	0 output ethernet-in-IP packets
	0 input bytes
	0 output bytes
ipcomp:
	0 input IPCOMP packets
	0 output IPCOMP packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed (de)compression processing
	0 packets less than minimum compression length
	0 input bytes
	0 output bytes
carp:
	0 packets received (IPv4)
	0 packets received (IPv6)
		0 packets discarded for bad interface
		0 packets discarded for wrong TTL
		0 packets shorter than header
		0 discarded for bad checksums
		0 discarded packets with a bad version
		0 discarded because packet too short
		0 discarded for bad authentication
		0 discarded for unknown vhid
		0 discarded because of a bad address list
	0 packets sent (IPv4)
	0 packets sent (IPv6)
		0 send failed due to mbuf memory error
	0 transitions to master
pfsync:
	0 packets received (IPv4)
	0 packets received (IPv6)
		0 packets discarded for bad interface
		0 packets discarded for bad ttl
		0 packets shorter than header
		0 packets discarded for bad version
		0 packets discarded for bad HMAC
		0 packets discarded for bad action
		0 packets discarded for short packet
		0 states discarded for bad values
		0 stale states
		0 failed state lookup/inserts
	0 packets sent (IPv4)
	0 packets sent (IPv6)
		0 send failed due to mbuf memory error
		0 send error
divert:
	0 total packets received
	0 dropped due to no socket
	0 dropped due to full socket buffers
	0 packets output
	0 errors
pflow:
	0 flows sent
	0 packets sent
		0 send failed due to mbuf memory error
		0 send error
ip6:
	411 total packets received
	0 with size smaller than minimum
	0 with data size < data length
	0 with bad options
	0 with incorrect version number
	0 fragments received
	0 fragments dropped (duplicates or out of space)
	0 fragments dropped after timeout
	0 fragments that exceeded limit
	0 packets reassembled ok
	176 packets for this host
	0 packets forwarded
	0 packets not forwardable
	0 redirects sent
	175 packets sent from this host
	0 packets sent with fabricated ip header
	0 output packets dropped due to no bufs, etc.
	0 output packets discarded due to no route
	0 output datagrams fragmented
	0 fragments created
	0 datagrams that can't be fragmented
	0 packets that violated scope rules
	0 multicast packets which we don't join
	Input packet histogram:
		TCP: 166
		UDP: 10
		ICMP6: 235
	Mbuf statistics:
		166 one mbufs
		245 one ext mbufs
		0 two or more ext mbufs
	0 tunneling packets that can't find gif
	0 packets discarded due to too many headers
	0 failures of source address selection
	source addresses on an outgoing I/F
		83 node-locals
	source addresses of same scope
		83 node-locals
	0 forward cache hit
	0 forward cache miss
divert6:
	0 total packets received
	0 dropped due to no socket
	0 dropped due to full socket buffers
	0 packets output
	0 errors
icmp6:
	0 calls to icmp6_error
	0 errors not generated because old message was icmp6 or so
	0 errors not generated because of rate limitation
	Output packet histogram:
		multicast listener report: 8
		neighbor solicitation: 1
	0 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	Input packet histogram:
		router advertisement: 235
	Histogram of error messages to be generated:
		0 no route
		0 administratively prohibited
		0 beyond scope
		0 address unreachable
		0 port unreachable
		0 packet too big
		0 time exceed transit
		0 time exceed reassembly
		0 erroneous header field
		0 unrecognized next header
		0 unrecognized option
		0 redirect
		0 unknown
	0 message responses generated
	0 messages with too many ND options
	0 messages with bad ND options
	0 bad neighbor solicitation messages
	0 bad neighbor advertisement messages
	0 bad router solicitation messages
	0 bad router advertisement messages
	0 bad redirect messages
	0 path MTU changes
pim6:
	0 messages received
	0 messages received with too few bytes
	0 messages received with bad checksum
	0 messages received with bad version
	0 registers received
	0 bad registers received
	0 registers sent
rip6:
	0 messages received
	0 checksum calculations on inbound
	0 messages with bad checksum
	0 messages dropped due to no socket
	0 multicast messages dropped due to no socket
	0 messages dropped due to full socket buffers
	0 delivered
	0 datagrams output

OpenBSD 5.1

ip:
	38876 total packets received
	1 bad header checksum
	0 with size smaller than minimum
	0 with data size < data length
	0 with header length < data size
	0 with data length < header length
	0 with bad options
	0 with incorrect version number
	0 fragments received
	0 fragments dropped (duplicates or out of space)
	0 malformed fragments dropped
	0 fragments dropped after timeout
	0 packets reassembled ok
	38875 packets for this host
	0 packets for unknown/unsupported protocol
	0 packets forwarded
	0 packets not forwardable
	0 redirects sent
	36235 packets sent from this host
	0 packets sent with fabricated ip header
	0 output packets dropped due to no bufs, etc.
	0 output packets discarded due to no route
	0 output datagrams fragmented
	0 fragments created
	0 datagrams that can't be fragmented
	0 fragment floods
	0 packets with ip length > max ip packet size
	0 tunneling packets that can't find gif
	0 datagrams with bad address in header
	16235 input datagrams checksum-processed by hardware
	2 output datagrams checksum-processed by hardware
	0 multicast packets which we don't join
icmp:
	0 calls to icmp_error
	0 errors not generated because old message was icmp
	0 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	0 echo requests to broadcast/multicast rejected
	0 message responses generated
igmp:
	0 messages received
	0 messages received with too few bytes
	0 messages received with bad checksum
	0 membership queries received
	0 membership queries received with invalid field(s)
	0 membership reports received
	0 membership reports received with invalid field(s)
	0 membership reports received for groups to which we belong
	0 membership reports sent
ipencap:
	0 total input packets
	0 total output packets
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets with possibly spoofed local addresses
	0 packets were dropped due to full output queue
	0 input bytes
	0 output bytes
	0 protocol family mismatches
	0 attempts to use tunnel with unspecified endpoint(s)
tcp:
	35623 packets sent
		18587 data packets (9007617 bytes)
		36 data packets (1332 bytes) retransmitted
		0 fast retransmitted packets
		15679 ack-only packets (8160 delayed)
		0 URG only packets
		0 window probe packets
		833 window update packets
		488 control packets
		0 packets hardware-checksummed
	38092 packets received
		17268 acks (for 9007538 bytes)
		142 duplicate acks
		0 acks for unsent data
		0 acks for old data
		22505 packets (9697921 bytes) received in-sequence
		2 completely duplicate packets (0 bytes)
		0 old duplicate packets
		0 packets with some duplicate data (0 bytes duplicated)
		73 out-of-order packets (0 bytes)
		0 packets (0 bytes) of data after window
		0 window probes
		80 window update packets
		0 packets received after close
		0 discarded for bad checksums
		0 discarded for bad header offset fields
		0 discarded because packet too short
		0 discarded for missing IPsec protection
		0 discarded due to memory shortage
		15187 packets hardware-checksummed
		0 bad/missing md5 checksums
		0 good md5 checksums
	278 connection requests
	132 connection accepts
	222 connections established (including accepts)
	486 connections closed (including 3 drops)
	0 connections drained
	188 embryonic connections dropped
	17358 segments updated rtt (of 16446 attempts)
	36 retransmit timeouts
		3 connections dropped by rexmit timeout
	0 persist timeouts
	2 keepalive timeouts
		2 keepalive probes sent
		0 connections dropped by keepalive
	5666 correct ACK header predictions
	14535 correct data packet header predictions
	458 PCB cache misses
	0 ECN connections accepted
		0 ECE packets received
		0 CWR packets received
		0 CE packets received
		0 ECT packets sent
		0 ECE packets sent
		0 CWR packets sent
			cwr by fastrecovery: 0
			cwr by timeout: 36
			cwr by ecn: 0
	0 bad connection attempts
	132 SYN cache entries added
		0 hash collisions
		132 completed
		0 aborted (no space to build PCB)
		0 timed out
		0 dropped due to overflow
		0 dropped due to bucket overflow
		0 dropped due to RST
		0 dropped due to ICMP unreachable
	0 SYN,ACKs retransmitted
	0 duplicate SYNs received for entries already in the cache
	0 SYNs dropped (no route or no space)
	0 SACK recovery episodes
		0 segment rexmits in SACK recovery episodes
		0 byte rexmits in SACK recovery episodes
	0 SACK options received
	0 SACK options sent
udp:
	783 datagrams received
	0 with incomplete header
	0 with bad data length field
	0 with bad checksum
	0 with no checksum
	687 input packets hardware-checksummed
	2 output packets hardware-checksummed
	0 dropped due to no socket
	362 broadcast/multicast datagrams dropped due to no socket
	0 dropped due to missing IPsec protection
	0 dropped due to full socket buffers
	421 delivered
	422 datagrams output
	34 missed PCB cache
esp:
	0 input ESP packets
	0 output ESP packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets with bad encryption received
	0 packets that failed verification received
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 possibly replayed packets received
	0 packets with bad payload size or padding received
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed crypto processing
	0 input UDP encapsulated ESP packets
	0 output UDP encapsulated ESP packets
	0 UDP packets for non-encapsulating TDB received
	0 input bytes
	0 output bytes
ah:
	0 input AH packets
	0 output AH packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets that failed verification received
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 possibly replayed packets received
	0 packets with bad authenticator length received
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed crypto processing
	0 input bytes
	0 output bytes
etherip:
	0 packets shorter than header shows
	0 packets were dropped due to full output queue
	0 packets were dropped because of no interface/bridge information
	0 packets dropped due to policy
	0 packets dropped for other reasons
	0 input ethernet-in-IP packets
	0 output ethernet-in-IP packets
	0 input bytes
	0 output bytes
ipcomp:
	0 input IPCOMP packets
	0 output IPCOMP packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed (de)compression processing
	0 packets less than minimum compression length
	0 input bytes
	0 output bytes
carp:
	0 packets received (IPv4)
	0 packets received (IPv6)
		0 packets discarded for bad interface
		0 packets discarded for wrong TTL
		0 packets shorter than header
		0 discarded for bad checksums
		0 discarded packets with a bad version
		0 discarded because packet too short
		0 discarded for bad authentication
		0 discarded for unknown vhid
		0 discarded because of a bad address list
	0 packets sent (IPv4)
	0 packets sent (IPv6)
		0 send failed due to mbuf memory error
	0 transitions to master
pfsync:
	0 packets received (IPv4)
	0 packets received (IPv6)
		0 packets discarded for bad interface
		0 packets discarded for bad ttl
		0 packets shorter than header
		0 packets discarded for bad version
		0 packets discarded for bad HMAC
		0 packets discarded for bad action
		0 packets discarded for short packet
		0 states discarded for bad values
		0 stale states
		0 failed state lookup/inserts
	0 packets sent (IPv4)
	0 packets sent (IPv6)
		0 send failed due to mbuf memory error
		0 send error
divert:
	0 total packets received
	0 dropped due to no socket
	0 dropped due to full socket buffers
	0 packets output
	0 errors
pflow:
	0 flows sent
	0 packets sent
		0 send failed due to mbuf memory error
		0 send error
ip6:
	0 total packets received
	0 with size smaller than minimum
	0 with data size < data length
	0 with bad options
	0 with incorrect version number
	0 fragments received
	0 fragments dropped (duplicates or out of space)
	0 fragments dropped after timeout
	0 fragments that exceeded limit
	0 packets reassembled ok
	0 packets for this host
	0 packets forwarded
	0 packets not forwardable
	0 redirects sent
	10 packets sent from this host
	0 packets sent with fabricated ip header
	0 output packets dropped due to no bufs, etc.
	0 output packets discarded due to no route
	0 output datagrams fragmented
	0 fragments created
	0 datagrams that can't be fragmented
	0 packets that violated scope rules
	0 multicast packets which we don't join
	Mbuf statistics:
		0 one mbufs
		0 one ext mbufs
		0 two or more ext mbufs
	0 tunneling packets that can't find gif
	0 packets discarded due to too many headers
	0 failures of source address selection
	0 forward cache hit
	0 forward cache miss
divert6:
	0 total packets received
	0 dropped due to no socket
	0 dropped due to full socket buffers
	0 packets output
	0 errors
icmp6:
	0 calls to icmp6_error
	0 errors not generated because old message was icmp6 or so
	0 errors not generated because of rate limitation
	Output packet histogram:
		multicast listener report: 8
		neighbor solicitation: 2
	0 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	Histogram of error messages to be generated:
		0 no route
		0 administratively prohibited
		0 beyond scope
		0 address unreachable
		0 port unreachable
		0 packet too big
		0 time exceed transit
		0 time exceed reassembly
		0 erroneous header field
		0 unrecognized next header
		0 unrecognized option
		0 redirect
		0 unknown
	0 message responses generated
	0 messages with too many ND options
	0 messages with bad ND options
	0 bad neighbor solicitation messages
	0 bad neighbor advertisement messages
	0 bad router solicitation messages
	0 bad router advertisement messages
	0 bad redirect messages
	0 path MTU changes
pim6:
	0 messages received
	0 messages received with too few bytes
	0 messages received with bad checksum
	0 messages received with bad version
	0 registers received
	0 bad registers received
	0 registers sent
rip6:
	0 messages received
	0 checksum calculations on inbound
	0 messages with bad checksum
	0 messages dropped due to no socket
	0 multicast messages dropped due to no socket
	0 messages dropped due to full socket buffers
	0 delivered
	0 datagrams output

OpenBSD 4.5

ip:
	113879070 total packets received
	0 bad header checksums
	0 with size smaller than minimum
	0 with data size < data length
	0 with header length < data size
	0 with data length < header length
	0 with bad options
	0 with incorrect version number
	0 fragments received
	0 fragments dropped (duplicates or out of space)
	0 malformed fragments dropped
	0 fragments dropped after timeout
	0 packets reassembled ok
	113856119 packets for this host
	21903 packets for unknown/unsupported protocol
	0 packets forwarded
	1048 packets not forwardable
	0 redirects sent
	167534674 packets sent from this host
	0 packets sent with fabricated ip header
	0 output packets dropped due to no bufs, etc.
	0 output packets discarded due to no route
	0 output datagrams fragmented
	0 fragments created
	0 datagrams that can't be fragmented
	0 fragment floods
	0 packets with ip length > max ip packet size
	0 tunneling packets that can't find gif
	0 datagrams with bad address in header
	0 input datagrams checksum-processed by hardware
	0 output datagrams checksum-processed by hardware
	0 multicast packets which we don't join
icmp:
	23352 calls to icmp_error
	0 errors not generated because old message was icmp
	Output packet histogram:
		echo reply: 2
		destination unreachable: 1450
	0 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	Input packet histogram:
		destination unreachable: 1
		echo: 2
	2 message responses generated
igmp:
	21902 messages received
	0 messages received with too few bytes
	0 messages received with bad checksum
	21902 membership queries received
	0 membership queries received with invalid field(s)
	0 membership reports received
	0 membership reports received with invalid field(s)
	0 membership reports received for groups to which we belong
	0 membership reports sent
ipencap:
	0 total input packets
	0 total output packets
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets with possibly spoofed local addresses
	0 packets were dropped due to full output queue
	0 input bytes
	0 output bytes
	0 protocol family mismatches
	0 attempts to use tunnel with unspecified endpoint(s)
tcp:
	167270512 packets sent
		155169891 data packets (202180710920 bytes)
		1638646 data packets (2147950886 bytes) retransmitted
		15314 fast retransmitted packets
		7078190 ack-only packets (12071080 delayed)
		0 URG only packets
		5540 window probe packets
		36313 window update packets
		3341932 control packets
		0 packets hardware-checksummed
	111547222 packets received
		88864288 acks (for 199370430017 bytes)
		7683219 duplicate acks
		0 acks for unsent data
		0 acks for old data
		12249277 packets (4687141549 bytes) received in-sequence
		417940 completely duplicate packets (11116414 bytes)
		5211 old duplicate packets
		806 packets with some duplicate data (179003 bytes duplicated)
		1297011 out-of-order packets (7173309 bytes)
		5 packets (5 bytes) of data after window
		5 window probes
		2040443 window update packets
		22313 packets received after close
		295 discarded for bad checksums
		0 discarded for bad header offset fields
		0 discarded because packet too short
		0 discarded for missing IPsec protection
		0 discarded due to memory shortage
		0 packets hardware-checksummed
		0 bad/missing md5 checksums
		0 good md5 checksums
	746 connection requests
	3485840 connection accepts
	3486338 connections established (including accepts)
	3495720 connections closed (including 636723 drops)
	0 connections drained
	248 embryonic connections dropped
	52914518 segments updated rtt (of 37891887 attempts)
	1000453 retransmit timeouts
		28646 connections dropped by rexmit timeout
	6896 persist timeouts
	5 keepalive timeouts
		5 keepalive probes sent
		0 connections dropped by keepalive
	12842986 correct ACK header predictions
	6710126 correct data packet header predictions
	7188442 PCB cache misses
	0 ECN connections accepted
		0 ECE packets received
		776 CWR packets received
		90355 CE packets received
		0 ECT packets sent
		0 ECE packets sent
		0 CWR packets sent
			cwr by fastrecovery: 469165
			cwr by timeout: 1000453
			cwr by ecn: 0
	7513 bad connection attempts
	3513244 SYN cache entries added
		0 hash collisions
		3485840 completed
		83 aborted (no space to build PCB)
		119 timed out
		0 dropped due to overflow
		0 dropped due to bucket overflow
		27202 dropped due to RST
		0 dropped due to ICMP unreachable
	107624 SYN,ACKs retransmitted
	64402 duplicate SYNs received for entries already in the cache
	0 SYNs dropped (no route or no space)
	453851 SACK recovery episodes
		831147 segment rexmits in SACK recovery episodes
		1126292568 byte rexmits in SACK recovery episodes
	4403069 SACK options received
	19974 SACK options sent
udp:
	2313974 datagrams received
	0 with incomplete header
	0 with bad data length field
	0 with bad checksum
	20 with no checksum
	0 input packets hardware-checksummed
	0 output packets hardware-checksummed
	1453 dropped due to no socket
	2183211 broadcast/multicast datagrams dropped due to no socket
	0 dropped due to missing IPsec protection
	0 dropped due to full socket buffers
	129310 delivered
	129742 datagrams output
	1450 missed PCB cache
esp:
	0 input ESP packets
	0 output ESP packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets with bad encryption received
	0 packets that failed verification received
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 possibly replayed packets received
	0 packets with bad payload size or padding received
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed crypto processing
	0 input UDP encapsulated ESP packets
	0 output UDP encapsulated ESP packets
	0 UDP packets for non-encapsulating TDB received
	0 input bytes
	0 output bytes
ah:
	0 input AH packets
	0 output AH packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets that failed verification received
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 possibly replayed packets received
	0 packets with bad authenticator length received
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed crypto processing
	0 input bytes
	0 output bytes
etherip:
	0 packets shorter than header shows
	0 packets were dropped due to full output queue
	0 packets were dropped because of no interface/bridge information
	0 packets dropped due to policy
	0 packets dropped for other reasons
	0 input ethernet-in-IP packets
	0 output ethernet-in-IP packets
	0 input bytes
	0 output bytes
ipcomp:
	0 input IPCOMP packets
	0 output IPCOMP packets
	0 packets from unsupported protocol families
	0 packets shorter than header shows
	0 packets dropped due to policy
	0 packets for which no TDB was found
	0 input packets that failed to be processed
	0 packets for which no XFORM was set in TDB received
	0 packets were dropped due to full output queue
	0 packets where counter wrapping was detected
	0 packets attempted to use an invalid TDB
	0 packets got larger than max IP packet size
	0 packets that failed (de)compression processing
	0 packets less than minimum compression length
	0 input bytes
	0 output bytes
carp:
	0 packets received (IPv4)
	0 packets received (IPv6)
		0 packets discarded for bad interface
		0 packets discarded for wrong TTL
		0 packets shorter than header
		0 discarded for bad checksums
		0 discarded packets with a bad version
		0 discarded because packet too short
		0 discarded for bad authentication
		0 discarded for unknown vhid
		0 discarded because of a bad address list
	0 packets sent (IPv4)
	0 packets sent (IPv6)
		0 send failed due to mbuf memory error
	0 transitions to master
pfsync:
	0 packets received (IPv4)
	0 packets received (IPv6)
		0 packets discarded for bad interface
		0 packets discarded for bad ttl
		0 packets shorter than header
		0 packets discarded for bad version
		0 packets discarded for bad HMAC
		0 packets discarded for bad action
		0 packets discarded for short packet
		0 states discarded for bad values
		0 stale states
		0 failed state lookup/inserts
	0 packets sent (IPv4)
	0 packets sent (IPv6)
		0 send failed due to mbuf memory error
		0 send error
pflow:
	0 flows sent
	0 packets sent
		0 send failed due to mbuf memory error
		0 send error
ip6:
	8443 total packets received
	0 with size smaller than minimum
	0 with data size < data length
	0 with bad options
	0 with incorrect version number
	0 fragments received
	0 fragments dropped (duplicates or out of space)
	0 fragments dropped after timeout
	0 fragments that exceeded limit
	0 packets reassembled ok
	5079 packets for this host
	0 packets forwarded
	0 packets not forwardable
	0 redirects sent
	5086 packets sent from this host
	0 packets sent with fabricated ip header
	0 output packets dropped due to no bufs, etc.
	0 output packets discarded due to no route
	0 output datagrams fragmented
	0 fragments created
	0 datagrams that can't be fragmented
	0 packets that violated scope rules
	296 multicast packets which we don't join
	Input packet histogram:
		hop by hop: 6
		TCP: 5079
		ICMP6: 3358
	Mbuf statistics:
		4796 one mbufs
		two or more mbuf:
			lo0 = 283
		3364 one ext mbufs
		0 two or more ext mbufs
	0 packets whose headers are not continuous
	0 tunneling packets that can't find gif
	0 packets discarded due to too many headers
	0 failures of source address selection
	source addresses on an outgoing I/F
		2 node-locals
	source addresses of same scope
		2 node-locals
	0 forward cache hit
	0 forward cache miss
icmp6:
	0 calls to icmp6_error
	0 errors not generated because old message was icmp6 or so
	0 errors not generated because of rate limitation
	Output packet histogram:
		multicast listener report: 6
		neighbor solicitation: 1
	0 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	Input packet histogram:
		multicast listener report: 6
		neighbor advertisement: 3062
	Histogram of error messages to be generated:
		0 no route
		0 administratively prohibited
		0 beyond scope
		0 address unreachable
		0 port unreachable
		0 packet too big
		0 time exceed transit
		0 time exceed reassembly
		0 erroneous header field
		0 unrecognized next header
		0 unrecognized option
		0 redirect
		0 unknown
	0 message responses generated
	0 messages with too many ND options
	0 messages with bad ND options
	0 bad neighbor solicitation messages
	0 bad neighbor advertisement messages
	0 bad router solicitation messages
	0 bad router advertisement messages
	0 bad redirect messages
	0 path MTU changes
pim6:
	0 messages received
	0 messages received with too few bytes
	0 messages received with bad checksum
	0 messages received with bad version
	0 registers received
	0 bad registers received
	0 registers sent
rip6:
	0 messages received
	0 checksum calculations on inbound
	0 messages with bad checksum
	0 messages dropped due to no socket
	0 multicast messages dropped due to no socket
	0 messages dropped due to full socket buffers
	0 delivered
	0 datagrams output

SunOS

SunOS 5.10

RAWIP	rawipInDatagrams    =     4	rawipInErrors       =     0
	rawipInCksumErrs    =     0	rawipOutDatagrams   =    11
	rawipOutErrors      =     0

UDP	udpInDatagrams      =883900	udpInErrors         =     0
	udpOutDatagrams     =595637	udpOutErrors        =     0

TCP	tcpRtoAlgorithm     =     4	tcpRtoMin           =   400
	tcpRtoMax           = 60000	tcpMaxConn          =    -1
	tcpActiveOpens      = 13323	tcpPassiveOpens     = 25502
	tcpAttemptFails     =   104	tcpEstabResets      =   444
	tcpCurrEstab        =    29	tcpOutSegs          =10974247
	tcpOutDataSegs      =17549229	tcpOutDataBytes     =766486016
	tcpRetransSegs      =  1952	tcpRetransBytes     =1153273
	tcpOutAck           =563037	tcpOutAckDelayed    =243780
	tcpOutUrg           =     0	tcpOutWinUpdate     =   422
	tcpOutWinProbe      =    62	tcpOutControl       = 78222
	tcpOutRsts          =   600	tcpOutFastRetrans   =    88
	tcpInSegs           =8618291
	tcpInAckSegs        =8162920	tcpInAckBytes       =240168277
	tcpInDupAck         = 37303	tcpInAckUnsent      =     0
	tcpInInorderSegs    =4221681	tcpInInorderBytes   =1569280709
	tcpInUnorderSegs    =  1555	tcpInUnorderBytes   =2752928
	tcpInDupSegs        =  3747	tcpInDupBytes       =271298
	tcpInPartDupSegs    =     0	tcpInPartDupBytes   =     0
	tcpInPastWinSegs    =     1	tcpInPastWinBytes   =265402301
	tcpInWinProbe       =     0	tcpInWinUpdate      =    38
	tcpInClosed         =   103	tcpRttNoUpdate      =    20
	tcpRttUpdate        =8128899	tcpTimRetrans       =   735
	tcpTimRetransDrop   =    74	tcpTimKeepalive     =  1217
	tcpTimKeepaliveProbe=     7	tcpTimKeepaliveDrop =     0
	tcpListenDrop       =     0	tcpListenDropQ0     =     0
	tcpHalfOpenDrop     =     0	tcpOutSackRetrans   =   711

IPv4	ipForwarding        =     2	ipDefaultTTL        =   255
	ipInReceives        =10278918	ipInHdrErrors       =     0
	ipInAddrErrors      =     0	ipInCksumErrs       =     0
	ipForwDatagrams     =     0	ipForwProhibits     =     1
	ipInUnknownProtos   = 18858	ipInDiscards        =     3
	ipInDelivers        =10056663	ipOutRequests       =16653663
	ipOutDiscards       =     0	ipOutNoRoutes       =     0
	ipReasmTimeout      =    60	ipReasmReqds        =    79
	ipReasmOKs          =    79	ipReasmFails        =     0
	ipReasmDuplicates   =     0	ipReasmPartDups     =     0
	ipFragOKs           =     0	ipFragFails         =     0
	ipFragCreates       =     0	ipRoutingDiscards   =     0
	tcpInErrs           =    14	udpNoPorts          =461901
	udpInCksumErrs      =     3	udpInOverflows      =     0
	rawipInOverflows    =     0	ipsecInSucceeded    =257293
	ipsecInFailed       =     0	ipInIPv6            =     0
	ipOutIPv6           =     0	ipOutSwitchIPv6     =     0

IPv6	ipv6Forwarding      =     2	ipv6DefaultHopLimit =     0
	ipv6InReceives      =  5767	ipv6InHdrErrors     =     0
	ipv6InTooBigErrors  =     0	ipv6InNoRoutes      =     0
	ipv6InAddrErrors    =     0	ipv6InUnknownProtos =     0
	ipv6InTruncatedPkts =     0	ipv6InDiscards      =     0
	ipv6InDelivers      = 27367	ipv6OutForwDatagrams=     0
	ipv6OutRequests     = 33751	ipv6OutDiscards     =     2
	ipv6OutNoRoutes     = 17271	ipv6OutFragOKs      =     0
	ipv6OutFragFails    =     0	ipv6OutFragCreates  =     0
	ipv6ReasmReqds      =     0	ipv6ReasmOKs        =     0
	ipv6ReasmFails      =     0	ipv6InMcastPkts     =  5767
	ipv6OutMcastPkts    =  6603	ipv6ReasmDuplicates =     0
	ipv6ReasmPartDups   =     0	ipv6ForwProhibits   =     0
	udpInCksumErrs      =     0	udpInOverflows      =     0
	rawipInOverflows    =     0	ipv6InIPv4          =     0
	ipv6OutIPv4         =     0	ipv6OutSwitchIPv4   =     0

ICMPv4	icmpInMsgs          =  5062	icmpInErrors        =     0
	icmpInCksumErrs     =     0	icmpInUnknowns      =     0
	icmpInDestUnreachs  =  4971	icmpInTimeExcds     =    35
	icmpInParmProbs     =     0	icmpInSrcQuenchs    =     0
	icmpInRedirects     =     0	icmpInBadRedirects  =     0
	icmpInEchos         =    53	icmpInEchoReps      =     3
	icmpInTimestamps    =     0	icmpInTimestampReps =     0
	icmpInAddrMasks     =     0	icmpInAddrMaskReps  =     0
	icmpInFragNeeded    =     0	icmpOutMsgs         =  2458
	icmpOutDrops        = 18858	icmpOutErrors       =     0
	icmpOutDestUnreachs =  2405	icmpOutTimeExcds    =     0
	icmpOutParmProbs    =     0	icmpOutSrcQuenchs   =     0
	icmpOutRedirects    =     0	icmpOutEchos        =     0
	icmpOutEchoReps     =    53	icmpOutTimestamps   =     0
	icmpOutTimestampReps=     0	icmpOutAddrMasks    =     0
	icmpOutAddrMaskReps =     0	icmpOutFragNeeded   =     0
	icmpInOverflows     =     0

ICMPv6	icmp6InMsgs         = 17494	icmp6InErrors       =     0
	icmp6InDestUnreachs =  9845	icmp6InAdminProhibs =     0
	icmp6InTimeExcds    =     0	icmp6InParmProblems =     0
	icmp6InPktTooBigs   =     0	icmp6InEchos        =     0
	icmp6InEchoReplies  =     0	icmp6InRouterSols   =     0
	icmp6InRouterAds    =     0	icmp6InNeighborSols =     2
	icmp6InNeighborAds  =  7647	icmp6InRedirects    =     0
	icmp6InBadRedirects =     0	icmp6InGroupQueries =     0
	icmp6InGroupResps   =     0	icmp6InGroupReds    =     0
	icmp6InOverflows    =     0
	icmp6OutMsgs        = 13617	icmp6OutErrors      =     0
	icmp6OutDestUnreachs=  9845	icmp6OutAdminProhibs=     0
	icmp6OutTimeExcds   =     0	icmp6OutParmProblems=     0
	icmp6OutPktTooBigs  =     0	icmp6OutEchos       =     0
	icmp6OutEchoReplies =     0	icmp6OutRouterSols  =     3
	icmp6OutRouterAds   =     0	icmp6OutNeighborSols=     4
	icmp6OutNeighborAds =  3760	icmp6OutRedirects   =     0
	icmp6OutGroupQueries=     0	icmp6OutGroupResps  =     5
	icmp6OutGroupReds   =     0

IGMP:
      18858 messages received
          0 messages received with too few bytes
          0 messages received with bad checksum
       9451 membership queries received
          0 membership queries received with invalid field(s)
          0 membership reports received
          0 membership reports received with invalid field(s)
          0 membership reports received for groups to which we belong
       9407 membership reports sent

SCTP	sctpRtoAlgorithm    =  vanj	sctpRtoMin          =  1000
	sctpRtoMax          = 60000	sctpRtoInitial      =  3000
	sctpMaxAssocs       =    -1	sctpValCookieLife   = 60000
	sctpMaxInitRetr     =     8	sctpCurrEstab       =     0
	sctpActiveEstab     =     0	sctpPassiveEstab    =     0
	sctpAborted         =     0	sctpShutdowns       =     0
	sctpOutOfBlue       =     0	sctpChecksumError   =     0
	sctpOutCtrlChunks   =     0	sctpOutOrderChunks  =     0
	sctpOutUnorderChunks=     0	sctpRetransChunks   =     0
	sctpOutAck          =     0	sctpOutAckDelayed   =     0
	sctpOutWinUpdate    =     0	sctpOutFastRetrans  =     0
	sctpOutWinProbe     =     0	sctpInCtrlChunks    =     0
	sctpInOrderChunks   =     0	sctpInUnorderChunks =     0
	sctpInAck           =     0	sctpInDupAck        =     0
	sctpInAckUnsent     =     0	sctpFragUsrMsgs     =     0
	sctpReasmUsrMsgs    =     0	sctpOutSCTPPkts     =     0
	sctpInSCTPPkts      =     0	sctpInInvalidCookie =     0
	sctpTimRetrans      =     0	sctpTimRetransDrop  =     0
	sctpTimHearBeatProbe=     0	sctpTimHearBeatDrop =     0
	sctpListenDrop      =     0	sctpInClosed        =     0

Cisco

Here is the output of    show ip traffic

IP statistics:
  Rcvd:  326 total, 299 local destination
         0 format errors, 0 checksum errors, 0 bad hop count
         0 unknown protocol, 0 not a gateway
         0 security failures, 0 bad options, 0 with options
  Opts:  0 end, 0 nop, 0 basic security, 0 loose source route
         0 timestamp, 0 extended security, 0 record route
         0 stream ID, 0 strict source route, 0 alert, 0 cipso
         0 other
  Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
         0 fragmented, 0 couldn't fragment
  Bcast: 24 received, 8 sent
  Mcast: 0 received, 0 sent
  Sent:  249 generated, 0 forwarded
  Drop:  14 encapsulation failed, 0 unresolved, 0 no adjacency
         8 no route, 0 unicast RPF, 0 forced drop

ICMP statistics:
  Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 5 unreachable
        2 echo, 0 echo reply, 0 mask requests, 0 mask replies, 0 quench
        0 parameter, 0 timestamp, 0 info request, 0 other
        0 irdp solicitations, 0 irdp advertisements
  Sent: 0 redirects, 0 unreachable, 0 echo, 2 echo reply
        0 mask requests, 0 mask replies, 0 quench, 0 timestamp
        0 info reply, 0 time exceeded, 0 parameter problem
        0 irdp solicitations, 0 irdp advertisements

UDP statistics:
  Rcvd: 41 total, 0 checksum errors, 18 no port
  Sent: 36 total, 0 forwarded broadcasts

TCP statistics:
  Rcvd: 254 total, 0 checksum errors, 0 no port
  Sent: 212 total

Probe statistics:
  Rcvd: 0 address requests, 0 address replies
        0 proxy name requests, 0 where-is requests, 0 other
  Sent: 0 address requests, 0 address replies (0 proxy)
        0 proxy name replies, 0 where-is replies

EGP statistics:
  Rcvd: 0 total, 0 format errors, 0 checksum errors, 0 no listener
  Sent: 0 total

IGRP statistics:
  Rcvd: 0 total, 0 checksum errors
  Sent: 0 total

OSPF statistics:
  Rcvd: 0 total, 0 checksum errors
        0 hello, 0 database desc, 0 link state req
        0 link state updates, 0 link state acks

  Sent: 0 total

IP-IGRP2 statistics:
  Rcvd: 0 total
  Sent: 0 total

PIMv2 statistics: Sent/Received
  Total: 0/0, 0 checksum errors, 0 format errors
  Registers: 0/0, Register Stops: 0/0,  Hellos: 0/0
  Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0
  Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0

IGMP statistics: Sent/Received
  Total: 0/0, Format errors: 0/0, Checksum errors: 0/0
  Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0 
  DVMRP: 0/0, PIM: 0/0

ARP statistics:
  Rcvd: 10 requests, 1 replies, 0 reverse, 0 other
  Sent: 3 requests, 11 replies (0 proxy), 0 reverse

Here is the output of    show tcp statistics

Rcvd: 332 Total, 0 no port
      0 checksum error, 0 bad offset, 0 too short
      214 packets (315 bytes) in sequence
      0 dup packets (0 bytes)
      0 partially dup packets (0 bytes)
      0 out-of-order packets (0 bytes)
      0 packets (0 bytes) with data after window
      0 packets after close
      0 window probe packets, 0 window update packets
      0 dup ack packets, 0 ack packets with unsend data
      222 ack packets (25253 bytes)
Sent: 274 Total, 0 urgent packets
      1 control packets (including 0 retransmitted)
      257 data packets (25254 bytes)
      0 data packets (0 bytes) retransmitted
      16 ack only packets (16 delayed)
      0 window probe packets, 0 window update packets
0 Connections initiated, 1 connections accepted, 1 connections established
0 Connections closed (including 0 dropped, 0 embryonic dropped)
0 Total rxmt timeout, 0 connections dropped in rxmt timeout
0 Keepalive timeout, 0 keepalive probe, 0 Connections dropped in keepalive

Historical Examples

SunOS 4.1.1

udp:
	0 incomplete headers
	0 bad data length fields
	0 bad checksums
	0 socket overflows
tcp:
	5129067 packets sent
		3910227 data packets (468550717 bytes)
		4484 data packets (812357 bytes) retransmitted
		923879 ack-only packets (825994 delayed)
		485 URG only packets
		1681 window probe packets
		229373 window update packets
		58948 control packets
	5321087 packets received
		3615669 acks (for 468578941 bytes)
		50858 duplicate acks
		0 acks for unsent data
		3926829 packets (596246583 bytes) received in-sequence
		6795 completely duplicate packets (737152 bytes)
		179 packets with some dup. data (8550 bytes duped)
		44965 out-of-order packets (1892274 bytes)
		13827 packets (1592878 bytes) of data after window
		2097 window probes
		6390 window update packets
		238 packets received after close
		1 discarded for bad checksum
		0 discarded for bad header offset fields
		0 discarded because packet too short
	13210 connection requests
	33906 connection accepts
	46383 connections established (including accepts)
	48029 connections closed (including 1160 drops)
	821 embryonic connections dropped
	3587807 segments updated rtt (of 3606368 attempts)
	4564 retransmit timeouts
		4 connections dropped by rexmit timeout
	65 persist timeouts
	6155 keepalive timeouts
		2038 keepalive probes sent
		115 connections dropped by keepalive
icmp:
	284410 calls to icmp_error
	0 errors not generated 'cuz old message too short
	0 errors not generated 'cuz old message was icmp
	Output histogram:
		echo reply: 6
		destination unreachable: 284410
	32 messages with bad code fields
	0 messages < minimum length
	0 bad checksums
	0 messages with bad length
	Input histogram:
		echo reply: 139
		destination unreachable: 284523
		source quench: 13
		echo: 6
		time exceeded: 24
	6 message responses generated
ip:
	18208602 total packets received
	0 bad header checksums
	0 with size smaller than minimum
	0 with data size < data length
	0 with header length < data size
	0 with data length < header length
	950137 fragments received
	0 fragments dropped (dup or out of space)
	143 fragments dropped after timeout
	0 packets forwarded
	0 packets not forwardable
	0 redirects sent
	0 ip input queue drops

SunOS 5.3

UDP
	udpInDatagrams      =7414564	udpInErrors         =     0
	udpOutDatagrams     =6512142

TCP	tcpRtoAlgorithm     =     4	tcpRtoMin           =   200
	tcpRtoMax           = 60000	tcpMaxConn          =    -1
	tcpActiveOpens      = 54250	tcpPassiveOpens     = 21125
	tcpAttemptFails     =   997	tcpEstabResets      = 63047
	tcpCurrEstab        =    27	tcpOutSegs          =25923926
	tcpOutDataSegs      =22351702	tcpOutDataBytes     =2010766060
	tcpRetransSegs      =241242	tcpRetransBytes     =83568747
	tcpOutAck           =3573443	tcpOutAckDelayed    =1975482
	tcpOutUrg           =  1296	tcpOutWinUpdate     =  4045
	tcpOutWinProbe      =  7231	tcpOutControl       =270923
	tcpOutRsts          = 16769	tcpOutFastRetrans   =  3065
	tcpInSegs           =16961868
	tcpInAckSegs        =11264480	tcpInAckBytes       =2009322750
	tcpInDupAck         =330904	tcpInAckUnsent      =     0
	tcpInInorderSegs    =10599470	tcpInInorderBytes   =1690623444
	tcpInUnorderSegs    = 43478	tcpInUnorderBytes   =28159048
	tcpInDupSegs        =  5277	tcpInDupBytes       =907838
	tcpInPartDupSegs    =   575	tcpInPartDupBytes   =245987
	tcpInPastWinSegs    =     0	tcpInPastWinBytes   =     0
	tcpInWinProbe       =  6507	tcpInWinUpdate      =  6059
	tcpInClosed         =  2010	tcpRttNoUpdate      = 59423
	tcpRttUpdate        =3806139	tcpTimRetrans       =246023
	tcpTimRetransDrop   =   195	tcpTimKeepalive     =  4654
	tcpTimKeepaliveProbe=  3451	tcpTimKeepaliveDrop =     1

IP	ipForwarding        =     2	ipDefaultTTL        =   255
	ipInReceives        =25929592	ipInHdrErrors       =     0
	ipInAddrErrors      =     0	ipInCksumErrs       =     0
	ipForwDatagrams     =     0	ipForwProhibits     =     0
	ipInUnknownProtos   =     0	ipInDiscards        =     0
	ipInDelivers        =24355001	ipOutRequests       =30760900
	ipOutDiscards       =     0	ipOutNoRoutes       =     0
	ipReasmTimeout      =    60	ipReasmReqds        =609440
	ipReasmOKs          =604871	ipReasmFails        =  4398
	ipReasmDuplicates   =     9	ipReasmPartDups     =     0
	ipFragOKs           =646218	ipFragFails         =     0
	ipFragCreates       =3683908	ipRoutingDiscards   =     0
	tcpInErrs           =    94	udpNoPorts          =793941
	udpInCksumErrs      =     4	udpInOverflows      =   667
	rawipInOverflows    =    76

ICMP	icmpInMsgs          =  7409	icmpInErrors        =     0
	icmpInCksumErrs     =     0	icmpInUnknowns      =     0
	icmpInDestUnreachs  =   879	icmpInTimeExcds     =   599
	icmpInParmProbs     =     0	icmpInSrcQuenchs    =   181
	icmpInRedirects     =     0	icmpInBadRedirects  =     0
	icmpInEchos         =     1	icmpInEchoReps      =     1
	icmpInTimestamps    =     0	icmpInTimestampReps =     0
	icmpInAddrMasks     =     0	icmpInAddrMaskReps  =     0
	icmpInFragNeeded    =    36	icmpOutMsgs         =  5243
	icmpOutDrops        =   315	icmpOutErrors       =     0
	icmpOutDestUnreachs =  3641	icmpOutTimeExcds    =  1601
	icmpOutParmProbs    =     0	icmpOutSrcQuenchs   =     0
	icmpOutRedirects    =     0	icmpOutEchos        =     0
	icmpOutEchoReps     =     1	icmpOutTimestamps   =     0
	icmpOutTimestampReps=     0	icmpOutAddrMasks    =     0
	icmpOutAddrMaskReps =     0	icmpOutFragNeeded   =     0
	icmpInOverflows     =     0
IGMP:
          0 messages received
          0 messages received with too few bytes
          0 messages received with bad checksum
          0 membership queries received
          0 membership queries received with invalid field(s)
          0 membership reports received
          0 membership reports received with invalid field(s)
          0 membership reports received for groups to which we belong
          0 membership reports sent

Linux 2.0.34

Ip:
    6889 total packets received
    0 with invalid headers
    0 with invalid addresses
    0 forwarded
    0 with unknown protocol
    0 incoming packets discarded
    6000 incoming packets delivered
    11851 requests sent out
    0 outgoing packets dropped
    18 dropped because of missing route
    0 fragments dropped after timeout
    0 reassemblies required
    0 packets reassembled ok
    0 packet reassembles failed
    0 fragments received ok
    0 fragments failed
    0 fragments created
Icmp:
    2 ICMP messages received
    0 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 2
    2 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 2
Tcp:
    9 active opens
    0 passive opens
    0 failed connection attempts
    0 connection resets received
    0 connections established
    887 segments received
    1122 segments send out
    32 segments retransmited
Udp:
    5998 packets received
    2 packets to unknown port received.
    0 packet receive errors
    5642 packets send