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Intermittent Network Connection problem- ping timeout

By jbronk ·
I'm having a problem with my Microsoft Server 2003 R2 and was hoping someone could give me some advice on locating the problem.

Our facility has 4 servers, 1 MS Server 2003 R2, 1-MS Exchange Server, 1-AS400 server and 1-Dell server.
I?m having problems keeping connected to the MS Server 2003, I?m having intermittent connection problems. I?ve tried many solutions and here are the symptoms. When I ping the MS Server 2003 from a known good device connected to a good switch. Here are my results.

ping 192.168.9.20 -t
Pinging 192.168.9.20 with 32 bytes of data:
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Request timed out.
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Reply from 192.168.9.20: bytes=32 time<1ms TTL=128
Request timed out.

When I ping the other servers in my network, the reply is perfect every time. I?m receiving this response from all 49 PC?s within my network.

I?m not that good at server configuration but this is what I have done so far:
Checked all switches in the network, replaced CAT5 cables leading to my server room, replaced the NIC card in the server and went as far as removing the hard drives in the MS Server 2003 and placed it into another backup server to see if the problem was related to my server?s hardware. I?ve ruled out all hardware in my network and now it looks like there?s something in the Server 2003 configuration that is causing this problem.
I must say that I'm not very good at Microsoft Server 2003 software.
Any suggestions as to what I can check? It seems simple but it's been beating me up for about 4 day's now

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All Answers

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OK I just have to ask

by OH Smeg In reply to Intermittent Network Conn ...

What is a Dell Server?

I know of a company named Dell who make hardware in the form of Assembled computers but I have never heard of a Dell Server as doing something unlike Exchange or ISA and so on.

Here as far as the 2003 Server goes turn off the DCHP in it.

Also what is on the Dell?

If the Dell is running 2003 SBS and the DC then just adding another 2003 Server to the Domain isn't going to work here you need to bring it in and promote it to whatever it was purchased for. One of these M$ Knowledge Base Articles should help you here

http://support.microsoft.com/kb/311078/en-us

http://support.microsoft.com/kb/910204/en-us

http://support.microsoft.com/kb/884453/en-us

I think that may be helpful but without knowing the Network Topology it's very hard to say one way or the other.

Col

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network topology

by jbronk In reply to OK I just have to ask

I guess I should have explained Network Topology. Sorry about that.
I hope I don?t ramble on here and I?ll try to explain.

We assembled our network about 6 months ago and has been working great until last week. For some reason we started experiencing these intermittent problems.

This network is in a hospital environment and we have the following structure.
Server 1 is Windows 2003 Server, used for DNS set up for DHCP
Server 2 is setup for Microsoft Exchange (Static IP)
Server 3 is a (Dell) Windows Server 2003 setup for running Pharmacy Software (Static IP)
Server 4 is a IBM AS400 for running Patient Billing Software (Static IP)

I have setup all 49 PC?s to point to Server 1 and obtain there IP thru DHCP on this server
Different departments use server 2, 3 and 4 thru connection with server 1 for various operations.

Part of the symptoms is when my billing department logs into server 1 (2003 server) to connect to the IBM AS400 Server 4, they loose connection due to the intermittent connection with the Server 1.

I?m going to turn off the DHCP and view the M$ Knowledge Base Articles in your previous post.

Thanks for the help, I?ll keep you posted on the results.

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OK I thought that this was a new install

by OH Smeg In reply to network topology

Not an existing setup so Don't turn off the DHCP that is what should be assigning address across the Domain.

Try loading Wireshark and see if that shows you what is happening here

http://www.wireshark.org/download.html

As this is a Hospital installation it's not a great idea to take things down seems that people complain and complain quite loudly as well.

Have you tried replacing any patch cables with new pre-made ones as apposed to ones made up as required here? When you make your own they can cause this type of Interment and are very hard to track down as they tend to test OK until they are bent out of shape and then stop transmitting data.

Col

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Problem Solved...........

by jbronk In reply to OK I thought that this wa ...

After many day's of confusion and troubleshooting I've taken your advice (OH Smeg) and downloaded Wireshark. I wasn't really sure of all the data was that I was getting but it was clear I had a IP conflict somewhere in my network. I checked every PC's IP address and found that the computers in my clinic were connected to my network thru a wireless router. The wireless router assigned 5 PC's there private IP address and one of the PC's was assigned the same IP as my server. Normally, this would not be a problem because the computers are after the wireless modem. One of my maintenance workers was doing some work in my clinic and had to disconnect the router to move it to another side of the room, but when he plugged the network cable back into the switch, he placed the wire in one of the ports instead of the input port of the router. So, to make a long story short, the computers that were assigned IP's thru DHCP from the router was assigned the same number as my server. I was suprised that the computer or my server never gave me a pop up that said "IP CONFLICT". When I scanned the system for current IP's in use, there was no indication that there was a problem. So, I assigned static IP's to my 5 computers in my clinic and now my network is running as wonderful as the day it was installed.
What a learning experience I would never want to go thru again. It was 10 day's of scratching my head over and over again.

Thanks for your help......

Jay Bronk

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Your Welcome. <NT>

by OH Smeg In reply to Problem Solved...........
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Same Problem

by sbaraqouni In reply to Your Welcome. <NT>

i've the same problem in my network, with similar topology and similar environment ... i don't solve it till now ... but m trying to solve it, monitoring Switch's Ports .. i hope that my problem could be solved inshalala

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Any Update?

by DKiewra In reply to Same Problem

Have you made progress? I'm having simiar issues and was wondering...

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That post is over a year old, so

by seanferd In reply to Same Problem

I'm not sure you will get any response from the poster.

Have you checked for an IP conflict? Tried using Wireshark to investigate the network traffic?

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BEST SOLUTION

by thundderkidd In reply to Intermittent Network Conn ...

I'VE ANALYZED THAT PROBLEM ALREADY. THE SOURCE OF IT WAS FROM AN APPLICATION AFFECTING YAHOO INTERFACE THAT WHEN YOUR CONNECTED TO IT A PING TIME OCCURS. POSSIBLE SOLUTION YOU DO IS TO INSTALL A LICENSED ANTI VIRUS SOFTWARE THAT CAN SCAN PROPERLY YOUR SERVERS OR PC'S. REPORT ANY CHANGES TO YOUR ANTIVIRUS PROVIDER. IF YOU CANT FIX IT REFORMAT YOUR COMPUTER, INSTALL SOME FIREWALL PROTECTOR, ILLEGAL ACCESS TRAPPER SOFTWARE, DEEPFREEZE OR OTHER SYSTEM LOCKER. JUST BACK UP FIRST YOUR FILES INCLUDING DATABASES OF YOUR COMPANY BEFORE YOU DO THE POSSIBLE ANSWER ^_^

HAVE A NICE DAY

BEST REGARDS:
POGI AKO

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Apparently not.

by seanferd In reply to BEST SOLUTION

As YOUR SOLUTION IN ALL CAPS has nothing to do with the problem experienced <i>at the beginning of the year</i> by the person who posted the question.

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