network traffic gone on lan

edotom · 06-10-2009, 07:23 AM

Hello everyone.

There is a problem on my company´s lan.
First of all we have a lan, connections to other lans, vpn's and many people connected at a given time.

Many times at night (most of the times at the same hour) the connectivity is gone. No internet and limited access to local servers.

I have installed (tried ) some sniffers like ethereal trying to search for the answer, but I don't know what to look for. We reinstalled all of our pc's in our lan, but we can control other lans connected.

What can we do to find what the problem is? This problem is becoming critical as we are unable to realize what the real problem is?
What can we do?

Thanks in advance

**johnwill** · 06-10-2009, 07:50 AM

I can't imagine anyone coming up with a useful answer to this issue. You have so many moving parts that it's not something you're going to analyze from a small post in a forum!

**lorjack** · 06-10-2009, 04:12 PM

The only thing i can suggest is for you to isolate the different networks, that will make it easier to track down.

grue155 · 06-10-2009, 08:27 PM

Quote:

Many times at night (most of the times at the same hour) the connectivity is gone. No internet and limited access to local servers.

This suggests a common failure point, like a router, or possibly a power supply to a set of routers.

There is an old story about the cleaning crew unplugging a server to use the power outlet for their vacuum cleaner. Your description has a similar characteristic.

06-10-2009, 07:23 AM	#1 (permalink)
edotom Registered User Join Date: Jun 2009 Posts: 1 OS: win xp	network traffic gone on lan Hello everyone. There is a problem on my company´s lan. First of all we have a lan, connections to other lans, vpn's and many people connected at a given time. Many times at night (most of the times at the same hour) the connectivity is gone. No internet and limited access to local servers. I have installed (tried ) some sniffers like ethereal trying to search for the answer, but I don't know what to look for. We reinstalled all of our pc's in our lan, but we can control other lans connected. What can we do to find what the problem is? This problem is becoming critical as we are unable to realize what the real problem is? What can we do? Thanks in advance

06-10-2009, 07:50 AM	#2 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,783 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Re: network traffic gone on lan I can't imagine anyone coming up with a useful answer to this issue. You have so many moving parts that it's not something you're going to analyze from a small post in a forum! __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

06-10-2009, 04:12 PM	#3 (permalink)
lorjack TSF Enthusiast Join Date: Nov 2007 Location: Planet Earth Posts: 2,205 OS: Windows 2K, XP Pro sp3, Windows Vista, Windows 7, Ubuntu	Re: network traffic gone on lan The only thing i can suggest is for you to isolate the different networks, that will make it easier to track down. __________________ Those who can't write, write manuals. Don't trouble trouble until trouble troubles you...