Re: Ping failures.
- From: "Lanwench [MVP - Exchange]" <lanwench@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 31 Jan 2008 08:24:56 -0500
Control Freq <nick@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hi,
I appreciate that I am not giving you much to go on, but I have a
networking problem.
I have a Sony Vaio Laptop, a 3Com OfficeConnect Hub and a Dell PE 2800
server.
Laptop is Win XP Pro, Server is Windows Server 2003.
The Server has an embedded Intel 10/100/1000 NIC as standard.
Based on what you've written, this really doesn't sound like a server
problem. I suspect you're having problems on your workstation (see below).
You also ought to swap out that hub for a decent Ethernet switch - they're
much better performing and are not expensive nowadays, even for small
offices.
Now, the problem is that I get intermittent ping responses from the
server.
This is not a broken cable issue.
If I set up a 'ping -t 192.168.1.100' in a command prompt on the
laptop, then I might see successful ping responses from the server.
The IP address just mentioned is the IP of the server.
Now, if I unplug the Cat 5 cable from the laptop, the ping response
changes to 'Hardware Error' and eventually changes to 'Destination
unreachable'
Yes, that's normal behavior.
Now, If I plug the network cable back in, I SOMETIMES start to receive
ping responses after a few seconds, but most often the laptop will
keep responding with 'request timedout'.
Stop the ping and start it again. You're unplugging & reconnecting your
network connection - this sounds perfectly normal to me so far!
After a few minutes of seeing 'request timedout' the laptop might
suddenly get a good reply to the ping.
So, I can't work out what is wrong with this?
Why would the server respond OK sometimes and not others?
It really doesn't sound like it's the server's fault - sounds like the issue
is with your laptop reconnecting to the network. This is either your laptop
(if you're using sony's crappy network management software, disable or
uninstall it in favor of the built-in networking stuff in Windows) or you're
having a problem on your hub.
Just as a further test, I can also plug in another PC into the hub,
and this same ping test succeeds every time to that piece of kit. I am
inclined to believe that there is something wrong with the NIC on the
server,
From the server, you might mention whether you are having any problemsconnecting to anything.
but I need more advice.
Also, in the full network setup. If I plug in a hardware firewall into
the hub, and have lots of PCs connecting through the firewall, they
all ping the server OK everytime!!!
You'll have to explain what you mean by "plug a hardware firewall into the
hub" -as in, is this going onto your LAN, etc.
I don't understand enough about this problem.
Sorry, but I really don't understand what the problem *is* yet. What are the
symptoms of the
issue that caused you to write, outside of the ethernet cable
disconnect/ping thing?
Any help appreciated!
Regards
.
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