Re: Alex Bochannek: TCP issue.

[Alex Bochannek <alex@p9.com>]

> What does netstat -ns say about IP and TCP errors ?

It's appended below. It is fairly useless though since it is the
cumulative count since start-up and I have not captured the stats
before and after his connection attempt. I can do this on Friday.

> What kernel version are you running ?

2.5-current from Jul 19.

Alex.


ip:
        1594297 total packets received
        0 bad header checksums
        0 with size smaller than minimum
        9 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 (dup or out of space)
        0 malformed fragments dropped
        0 fragments dropped after timeout
        0 packets reassembled ok
        1554620 packets for this host
        0 packets for unknown/unsupported protocol
        0 packets forwarded
        39668 packets not forwardable
        0 redirects sent
        1487588 packets sent from this host
        152 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
icmp:
        1252 calls to icmp_error
        0 errors not generated 'cuz old message was icmp
        Output histogram:
                echo reply: 1124
                destination unreachable: 1252
        0 messages with bad code fields
        0 messages < minimum length
        0 bad checksums
        0 messages with bad length
        Input histogram:
                echo reply: 15
                destination unreachable: 4685
                echo: 1124
                time exceeded: 231
        1124 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
tcp:
        1102465 packets sent
                614361 data packets (272277063 bytes)
                2623 data packets (1027658 bytes) retransmitted
                384 fast retransmitted packets
                422434 ack-only packets (5619 delayed)
                18 URG only packets
                116 window probe packets
                25850 window update packets
                37063 control packets
        863146 packets received
                520879 acks (for 271724476 bytes)
                16334 duplicate acks
                0 acks for unsent data
                486903 packets (133561195 bytes) received in-sequence
                3273 completely duplicate packets (1229052 bytes)
                0 old duplicate packets
                20 packets with some dup. data (2607 bytes duped)
                30483 out-of-order packets (7167567 bytes)
                20 packets (8388 bytes) of data after window
                4 window probes
                33137 window update packets
                63 packets received after close
                13 discarded for bad checksums
                0 discarded for bad header offset fields
                0 discarded because packet too short
                0 discarded for missing IPSec protection
        4212 connection requests
        29029 connection accepts
        31191 connections established (including accepts)
        34871 connections closed (including 4376 drops)
        2551 embryonic connections dropped
        446935 segments updated rtt (of 448548 attempts)
        8930 retransmit timeouts
                138 connections dropped by rexmit timeout
        254 persist timeouts
        2052 keepalive timeouts
                218 keepalive probes sent
                1789 connections dropped by keepalive
        98767 correct ACK header predictions
        265677 correct data packet header predictions
        30927 PCB cache misses
        0 SYN packets received with same src/dst address/port
udp:
        685419 datagrams received
        0 with incomplete header
        0 with bad data length field
        0 with bad checksum
        49627 with no checksum
        1252 dropped due to no socket
        31017 broadcast/multicast datagrams dropped due to no socket
        0 dropped due to missing IPSec protection
        0 dropped due to full socket buffers
        653150 delivered
        381331 datagrams output
        258534 missed PCB cache