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  1. #1
    Join Date
    Apr 2004
    Location
    India
    Posts
    292

    Some n/w problem.....

    Hi People,
    I am trying to figure out this for last couple of hrs..
    See....maillog shows..

    Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/

    But I can do telnet ....to port 25 on remote server....

    but log still shows the same...

    Now I did tcpsump -vv dst host IP address

    It shows very slow o/p as ...
    17:44:49.197393 192.10.15.13.40508 > 203.199.162.248.smtp: S [tcp sum ok] 178083 ttl 64, id 3432, len 44)
    17:44:49.722783 192.10.15.13.40420 > 203.199.162.248.smtp: S [tcp sum ok] 173753 ttl 64, id 45240, len 44)
    17:44:55.197394 192.10.15.13.40508 > 203.199.162.248.smtp: S [tcp sum ok] 178083 ttl 64, id 3433, len 44)
    17:45:07.197394 192.10.15.13.40508 > 203.199.162.248.smtp: S [tcp sum ok] 178083 1039:1780831039(0) win 5840 <mss 1460> (DF) (ttl 64, id 3434, len 44)
    17:45:23.214857 192.10.15.13.40574 > 203.199.162.248.smtp: S [tcp sum ok] 182648 2916:1826482916(0) win 5840 <mss 1460> (DF) (ttl 64, id 17028, len 44)
    17:45:23.240588 192.10.15.13.40575 > 203.199.162.248.smtp: S [tcp sum ok] 183089 6380:1830896380(0) win 5840 <mss 1460> (DF) (ttl 64, id 60050, len 44)
    17:45:26.213022 192.10.15.13.40574 > 203.199.162.248.smtp: S [tcp sum ok] 182648 2916:1826482916(0) win 5840 <mss 1460> (DF) (ttl 64, id 17029, len 44)
    17:45:26.240370 192.10.15.13.40575 > 203.199.162.248.smtp: S [tcp sum ok] 183089 6380:1830896380(0) win 5840 <mss 1460> (DF) (ttl 64, id 60051, len 44)
    17:45:30.333405 192.10.15.13.40603 > 203.199.162.248.smtp: S [tcp sum ok] 184027 5888:1840275888(0) win 5840 <mss 1460> (DF) (ttl 64, id 55085, len 44)
    17:45:31.197409 192.10.15.13.40508 > 203.199.162.248.smtp: S [tcp sum ok] 178083

    ...So in 10 min...I received only 40 packets...

    My lspci -vv for n/w card shows...
    0a:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
    Subsystem: Surecom Technology EP-320X-R
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
    Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 64 (8000ns min, 16000ns max)
    Interrupt: pin A routed to IRQ 10
    Region 0: I/O ports at 5000 [size=256]
    Region 1: Memory at f7ff0000 (32-bit, non-prefetchable) [size=256]
    Capabilities: [50] Power Management version 2
    Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0-,D1+,D2+,D3hot+,D3cold+)
    Status: D0 PME-Enable- DSel=0 DScale=0 PME-
    ..
    I suspect on n/w card....
    What u people think...?
    thelinophile
    Thinking Different !!

  2. #2
    Join Date
    Jul 2001
    Location
    Glasgow, Scotland
    Posts
    129
    IMHO, none of those super cheap integrated in one single IC network cards are suitable for heavy network load.
    Realtek RTL-8139 is definitively one of such cards!
    My development blog - (un)Interesting codesnippets and the occational code-related rant!

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