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Linux - Networking This forum is for any issue related to networks or networking.
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Old 05-02-2004, 03:02 PM   #1
liutom
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Registered: Oct 2003
Posts: 24

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Network crashes whole PC -> PLEASE help


Hello !

I`ve a problem with my network

I have 2 ethernet cards...

eth1 (192.168.1.100 is connected to 192.168.1.1 (on a second PC)
but when i transfer data through the cabel my system stopps working...
this happens not when i use "ssh" or for example "swat"

only if i transfer more things (like data, or when i connect through "VNC") then my computer stops working...
(btw. this pc which stops is a P4 2GHz 512 MBram -> this should be enough:-))

any ideas how to make my datatransfer more stable ????


thank you alot for your answers!!!

Liu
 
Old 05-02-2004, 07:07 PM   #2
btmiller
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Registered: May 2004
Location: In the DC 'burbs
Distribution: Arch, Scientific Linux, Debian, Ubuntu
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There's not really enough information in your post to go on, but it sounds like it may be a hardware issue of some kind. What do you mean when you say your computer "stops working"? Does the net connection go down? Or does the machine freeze? Assuming that the machine doesn't freeze, do the system logs have anything useful to say? I've seen ethernet drivers die and shut the device down when they got overwhelmed with packets -- maybe there's something similar in your case, but that shouldn't happen on relatively modern well-designed hardware with good drivers.

In any case, if you want more help I would suggest posting more detailed symptoms and some of your hardware specs. Also, are the computers connected directly via a crossover cable or is there a hub or switch?
 
Old 05-03-2004, 03:18 AM   #3
liutom
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Registered: Oct 2003
Posts: 24

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Thanks for your replay!

My system:
ASUS P4T533-c Mainboard
P4 2GHz
512MBRam
160GB HDD
GFORCE4MX
Realtek (Network)
Onboard Intel ethernet

it doesnīt matter on which ethernet interface i connect...
if i try to transfer data my PC stops working (freeze)
Ic canīt do anything...
the only thing is to reset!!!

I ve connected 2 PCīs
the second one is a P3 500 Mhz 128 MBRAM (with realtek network)
both PCīs are connectet throug a powerline adapter (this is a small box where you put your networkkabel in an your data is transfered throug your house "plug socket" from one room to another...
because of this powerlineadapter i can only connect with 10MBit/halfduplex...

both PC`s youse slackware current with SAMBA (kernel 2.4.26)


btw. When i connect from Windows (2GHz PC) to Linux (P3 500Mhz PC) I have no problems....

so I donīt think it is a hardwareproblem...

????

Thank you


LIU
 
Old 05-03-2004, 03:36 AM   #4
liutom
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Registered: Oct 2003
Posts: 24

Original Poster
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Hmmm...

i recently talked with a person who claims to be very fit in IP/SUBNETs etc...
I donīt know if he is right!

he said i have a problem with my subnetmasks:

now:
P1 = Pentium3 500 (192.168.1.1 / 255.255.255.0)
P2 = Pentium4 2000 eth0 (192.168.1.100 / 255.255.255.0)
P2 = eth1 (192.168.0.100 / 255.255.255.0)
P3 = EPIA (192.168.0.1 / 255.255.255.0)

but he said i should change my subnetmasks:
P1 = Pentium3 500 (192.168.1.1 / 255.255.255.100 )
P2 = Pentium4 2000 eth0 (192.168.1.100 / 255.255.255.100 )
P2 = eth1 (192.168.0.100 / 255.255.255.0)
P3 = EPIA (192.168.0.1 / 255.255.255.0)


I canīt try now because im not on my pc now!
but: is he right ????


Thank you alot !!!


Liu
 
Old 05-03-2004, 09:19 AM   #5
liutom
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Registered: Oct 2003
Posts: 24

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Dose anyone know if he is right?

Bye,

Liu
 
Old 05-03-2004, 07:55 PM   #6
zaphodiv
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Registered: Oct 2003
Distribution: Slackware
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All the machines in the same subnet should use the same netmask.

255.255.255.100 is not a valid netmask.

100 (decimal) is 1100100 in binary.
192.168.1.1 / 255.255.255.100 is wrong, that would give you a subnet
that is not a continuous range of addresses.

It should be one of these, depending on how many ip addresses you need.
255.255.255.0 -> 1111 1111 1111 1111 1111 1111 0000 0000
255.255.255.128 -> 1111 1111 1111 1111 1111 1111 1000 0000
255.255.255.192 -> 1111 1111 1111 1111 1111 1111 1100 0000
255.255.255.224 -> 1111 1111 1111 1111 1111 1111 1110 0000
255.255.255.240 -> 1111 1111 1111 1111 1111 1111 1111 0000
255.255.255.248 -> 1111 1111 1111 1111 1111 1111 1111 1000
255.255.255.252 -> 1111 1111 1111 1111 1111 1111 1111 1100

Your machine is unlikly to be freezing due to subnet settings. There
must be a hardware problem. kernel bug or driver module bug.
I have a problem with the video on a slackware9.1 machine, I suspect
there is an interrupt related bug in current slackware.
 
Old 05-07-2004, 05:33 AM   #7
nowonmai
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Can you ping the machine that's hung?
 
  


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