Urgent Network Issues

Don

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Mar 3, 2010, 11:32:12 PM3/3/10

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Hello, around last month we started to lose lan connections to our NAS.
We wanted to replace it anyways since it was old and did not have
encryption.

So we moved the data to the boses machine and we have still experienced
lan drop out so here is a list of what has been tried and replaced.

1. router replaced
2. switch replaced 2x
3. switched out machines new machines still drop
4. added new nas nas still drops
5. changed from wired to wireless still drops
6. changed network cards. still drops

Please help.

Frankster

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Mar 4, 2010, 9:04:01 AM3/4/10

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Try turning off ALL power saving settings on ALL connected computers.

-Frank

"Don" <donal...@gmail.com> wrote in message
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Don

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Mar 4, 2010, 10:28:08 AM3/4/10

to Frankster

Forgot to mention did that, for network adaptors no power saving is
enabled and even changed power settings for windows to always on

Frankster

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Mar 4, 2010, 10:38:44 AM3/4/10

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"Don" <donal...@gmail.com> wrote in message

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By "drops", do you mean the share disconnects? Or do you mean you cannot
ping that machine? By name? By IP?

This could also be due to a software (personal firewall?) you have loaded on
each machine. Any chance of that?

-Frank

Jack [MVP-Networking]

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Mar 4, 2010, 10:40:51 AM3/4/10

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Hi
Changing from Wire to wireless is not necessarily a general indication.
Start by connecting two computer to the switch with new commercially made
wires.
Jack (MS, MVP-Networking).

"Don" <donal...@gmail.com> wrote in message
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Don

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Mar 5, 2010, 9:43:47 PM3/5/10

to Jack [MVP-Networking]

seems my messages weren't getting through. I connected the computers
static ips to the switch with new cables and they still drop.

IS there a program i can install on the computer to monitor the network
and report what happens like wireshark? would wireshark be good to trac
what computer is causing the network to drop?

Ben M. Schorr, MVP

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Mar 6, 2010, 4:23:19 AM3/6/10

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<SWAG> Do you have your switch plugged into a good UPS?

--
-Ben-
Ben M. Schorr, MVP
Roland Schorr & Tower
http://www.rolandschorr.com
http://www.officeforlawyers.com/outlook.html
Author: The Lawyer's Guide to Microsoft Outlook 2007:
http://tinyurl.com/ol4law-amazon

"Don" <donal...@gmail.com> wrote in message
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Frankster

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Mar 6, 2010, 10:08:06 AM3/6/10

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I asked before but never saw an answer. What do you mean by "drop"? Can
you describe the exact symptoms?

-Frank

"Don" <donal...@gmail.com> wrote in message

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Don

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Mar 6, 2010, 12:20:18 PM3/6/10

to Frankster

sorry that was in my earlier messages that were never posted for some
reason.

drop means you will lose connectivity to the devices eg you can no
longer ping them, depending they will come back up after 2 minutes or
longer. sometimes they don't come back up without a restart or power cycle.

Don

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Mar 6, 2010, 12:21:30 PM3/6/10

to Ben M. Schorr, MVP

On 3/6/2010 2:23 AM, Ben M. Schorr, MVP wrote:
> <SWAG> Do you have your switch plugged into a good UPS?
>

yes. relatively new apc ups (around 1 year old)

Frankster

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Mar 6, 2010, 6:05:59 PM3/6/10

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Okay, after reading everything you've done in this thread, there's not much
more you can do.

However, one thing comes to mind. If this is on a VOIP system, this could
be it. This one caused me undue grief for a number of hours troubleshooting
until I got to the bottom of it. It was the SIP "ALG" service in my router.
I had to disable it. I found out after I had already tried another router,
like you. Before I disabled it, I could do a continuous ping and get back
something like...

ping...
no response
<delay of 5 seconds or so>
one response
no response
no response
no response
no response
response!
<delay of 3 seconds>
no response
response!
response!
response!
no response
no response
no response
<delay of 10 seconds>
response!
no response
etcetera...

...was driving me crazy...

Turned out what I had to do was to disable ALG support in the router
(Netgear in my case).

Check out this link...

http://www.voip-info.org/wiki/view/Routers+SIP+ALG

Anyway, other than that, I'm out of ideas, considering what you have already
changed.

-Frank

"Don" <donal...@gmail.com> wrote in message

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DOon

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Mar 6, 2010, 6:48:53 PM3/6/10

to Frankster

no voip system here. However I am changing every network card in the
systems and seeing if that works. Right now all machines have a static
ip and are connected to a switch with no router and seeing if any thing
drops. every machine is also being tested one at a time connected to the
switch and NAS with a large data file being transferred to see if it
causes any problems.

Don

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Mar 9, 2010, 1:40:59 AM3/9/10

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Ok it turned out 3 network cards were bad, one router had massive packet
loss, and one network cable needed to be replaced. After all that was
fixed systems ran great until...

the receptionists computer decided to die and it sent a surge through
the network killing off everything that was fixed.

Replaced everything again switch survived and they are now up.

Frankster

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Mar 9, 2010, 9:02:23 AM3/9/10

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"Don" <donal...@gmail.com> wrote in message

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Have you done something bad to piss-off God lately?

-Frank