RE: Network going up and down...

[email protected] wrote:
> My network works fine most of the time. But whenever I try to access a
> folder shared by samba my NIC stops responding. Could not figure out
> where the problem exactly is. :-(
>
> Thank you,
> Tina..

Oh Tine, you boggle my mind.  There have been 12 messages concerning this
problem "Network going up and down..." and NOW you say it's when you try to
access a folder shared by SAMBA!!!!

Go back to school and read how to write up a proper request for help.
Describe the situation in great detail.  ALL of the messages you have
posted to this list have been short terse messages that have generated a
considerable amount of traffic by people willing to give of their time and
talent to help YOU.  Why not give them the same courtesy and provide a
COMPLETE description of your problem.  Put yourself in their shoes.  Ask
yourself what information do I need to solve this problem and then provide
it.

And your statement "My network works fine most of the time", it should work
"fine" ALL OF THE TIME.  That is the level of service that Linux and RH
Linux provides.  ALL OF THE TIME!!  I dare say that your customers might be
getting a bad feeling about their Linux server.  They might be thinking it
is not up to the task based on all the problems you have been describing
here.  Well, I would say it is the fault of the sysadm and not the system!

stew



>
> ----- Original Message -----
> From: "Rick Warner" <[email protected]>
> To: <[email protected]>
> Sent: Friday, March 14, 2003 3:23 AM
> Subject: Re: Network going up and down...
>
>
>> On Fri, 14 Mar 2003, System wrote:
>>
>>> No i am trying to connect it through thr ip only and it connects
>>> but the connections remains for sometime and then i get lost:(
>>> I don't know why its up for sometime and then down for another
>>> restart.
>>>
>>> Where can i find the log for this:()
>>
>> Nowhere, most likely.  First, while every event that happens with an
>> OS could be logged in very few cases is doing so a good idea.
>> Second, many events are outside the control and/or knowledge of the
>> OS.  What you are describing sounds like it is a hardware or network
>> issue, not an OS issue.  In these cases the OS cannot log anything
>> as it has no knowledge of what has happened.   The one place in the
>> OS that could be an issue is the NIC driver.  What version of the
>> kernel, what NIC, what driver? Are there any messages about missed
>> interrupts by the NIC, buffer overruns, etc. in /var/log/messages?
>>
>> You contend in a prior message that there is no IP address conflict;
>> that alleviates one network issue.  Is there a routing issue?  Do
>> you have asymmetric routes?  Is this straight telnet or is it telnet
>> via some tunneling protocol?  Is there a hardware issue with the
>> NIC?  PCI bus? Bad cable?  Bad switch/hub port?  I would start by
>> looking at the easiest to control/fix.  If it is a managed
>> hub/switch, look at the device logs and see how many errors/bad
>> packets etc. occur as a percentage of bytes or packets transferred?
>> Is is abnormally high?  If you do not have a managed device, try a
>> different switch/hub port or a different switch/hub entirely.  Try a
>> different cable connecting the machine to the switch/hub (better to
>> test the cable if you have a REAL cable tester, not one of those $20
>> cheapies that only ensure that an applied current can travel end to
>> end).  Switch to a different NIC, even better if it uses a different
>> driver.
>>
>> Lots of things to try.  No one will be able to help you narrow it
>> down more unless you post more specifics, things like NIC mfr and
>> model, kernel version, driver, driver version, etc.  For network
>> issues, traceroute output is useful, even better if you have traces
>> from both ends (can show if you have asymmetric routes).
>>
>> - rick -
>>
>>
>>
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