[nflug] Help- At a Loss

[justin.bennett at dynabrade.com]

Thanks guys, after hours of troubleshooting with guys who's native 
language is not english, I had them pull every network connection from the 
switch except the servers, and plug them back in one at a time,  It wound 
up being a drop that ran to a Dlink switch in an area where salesguys plug 
in their laptops, as it turns out one of them apparently plugged both ends 
of a patch cable into the DLink switch...

Thanks again for the replies.. :)

Justin





Robert Meyer <meyer_rm at yahoo.com> 
Sent by: nflug-bounces at nflug.org
08/11/2008 02:18 PM
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nflug at nflug.org


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Re: [nflug] Help- At a Loss






Another possibility is that you have a mix of half duplex and full duplex 
links in your environment.  This causes FCS errors that cause lots of 
retransmissions.  This is especially bad between switches.  If your 
switches are talking to each other in full duplex but the machines are 
half, bad things happen.  It's the same problem if you have full duplex 
machines and half duplex switches...  Give that a check

Cheers!

Bob
 
--
"When once you have tasted flight, you will forever walk the earth with 
your eyes turned skyward, for there you have been, and there you will 
always long to return."
--Leonardo da Vinci


----- Original Message ----
From: Cyber Source <peter at thecybersource.com>
To: nflug at nflug.org
Sent: Monday, August 11, 2008 2:02:30 PM
Subject: Re: [nflug] Help- At a Loss

The first thing that comes to mind are these;
1. Duplicate MAC address on the network ?
2. Bad termination of an RJ45?
3. Some windows box gone hay wire?

justin.bennett at dynabrade.com wrote:
>
> Hey guys,
>
>        This is a little off topic, but I need some help. I'm 
> experiencing some packet loss on an internal network at one of our 
> remote locations. I don't understand why, It's network wide, if I try 
> to ping a windows server from a local desktop, I'll loose between 
> 6-19% of the packets, If I ping one server from another, or desktop to 
> desktop, I get packet loss, so bad it's affecting the performance of 
> the network to the point where DNS lookups fail and sites can't be 
> reached. I thought it was the network switch there, but I had him 
> replace it with a new one, (different brand) same problem. Is there 
> anything that may be causing this? I'm looking for thoughts at the 
> moment. Basically it's windows XP clients doing DHCP to a Linux box 
> running samba as a file server, and the a Windows 2003 server as their 
> application system.
>
> Thanks
> Justin
>
> ------------------------------------------------------------------------
>
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