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Web Hosting Guru
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..


But I can do telnet 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 > S [tcp sum ok] 178083 ttl 64, id 3432, len 44)
17:44:49.722783 > S [tcp sum ok] 173753 ttl 64, id 45240, len 44)
17:44:55.197394 > S [tcp sum ok] 178083 ttl 64, id 3433, len 44)
17:45:07.197394 > S [tcp sum ok] 178083 1039:1780831039(0) win 5840 <mss 1460> (DF) (ttl 64, id 3434, len 44)
17:45:23.214857 > S [tcp sum ok] 182648 2916:1826482916(0) win 5840 <mss 1460> (DF) (ttl 64, id 17028, len 44)
17:45:23.240588 > S [tcp sum ok] 183089 6380:1830896380(0) win 5840 <mss 1460> (DF) (ttl 64, id 60050, len 44)
17:45:26.213022 > S [tcp sum ok] 182648 2916:1826482916(0) win 5840 <mss 1460> (DF) (ttl 64, id 17029, len 44)
17:45:26.240370 > S [tcp sum ok] 183089 6380:1830896380(0) win 5840 <mss 1460> (DF) (ttl 64, id 60051, len 44)
17:45:30.333405 > S [tcp sum ok] 184027 5888:1840275888(0) win 5840 <mss 1460> (DF) (ttl 64, id 55085, len 44)
17:45:31.197409 > 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...?

Thinking Different !!

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WHT Addict
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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