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Lan Connection Lost Repeatedly


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#1 ed ting

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Posted 01 February 2006 - 07:52 AM

I have 5 computers networked. Pharmacy program running database program on 4 of them. Computer with program that other 4 pull information off of has started to lose it's lan connection which in turn locks other programs out.

All have Win XP pro SP2.
Connected via DL-524 wireless router (wired to those 4)
Vonage Linksys adapter (only using WAN port to for phone service, no ethernet lans used on it)
Netgear HUB to add 1 port for one of the computers.
NIC Broadcom NetXtreme 57xx Gigabit Controller: Network controller configured for 100Mb full-duplex link.

There is no pattern of dropping connection. Happens when store is closed or when we are there using them.

Note: It does look like the router might be resetting when this happens (lights blinking on and off at the same time on all ethernet nodes) (replace original router recently b/c it was doing the same but could not renew ip's at all)

I am allowing the router to auto DHCP to all computers.

Below is the most recent system events logged:
Event Type: Warning
Event Source: b57w2k
Event Category: None
Event ID: 4
Date: 1/31/2006
Time: 10:20:03 PM
User: N/A
Computer: TERM2
Description:
Broadcom NetXtreme 57xx Gigabit Controller: The network link is down. Check to make sure the network cable is properly connected.
Data:
0000: 00 00 00 00 02 00 56 00 ......V.
0008: 00 00 00 00 04 00 05 80 .......?
0010: 00 00 00 00 00 00 00 00 ........
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........


Event Type: Information
Event Source: b57w2k
Event Category: None
Event ID: 9
Date: 1/31/2006
Time: 10:20:05 PM
User: N/A
Computer: TERM2
Description:
Broadcom NetXtreme 57xx Gigabit Controller: Network controller configured for 100Mb full-duplex link.
Data:
0000: 00 00 00 00 02 00 56 00 ......V.
0008: 00 00 00 00 09 00 05 40 .......@
0010: 00 00 00 00 00 00 00 00 ........
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........


Event Type: Information
Event Source: Tcpip
Event Category: None
Event ID: 4201
Date: 1/31/2006
Time: 10:20:05 PM
User: N/A
Computer: TERM2
Description:
The system detected that network adapter \DEVICE\TCPIP_{36023401-E565-4CE7-BD0E-7F7DFCFC0419} was connected to the network, and has initiated normal operation over the network adapter.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00 02 00 50 00 ......P.
0008: 00 00 00 00 69 10 00 40 ....i..@
0010: 02 00 00 00 00 00 00 00 ........
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........


Event Type: Warning
Event Source: Dhcp
Event Category: None
Event ID: 1003
Date: 1/31/2006
Time: 10:20:08 PM
User: N/A
Computer: TERM2
Description:
Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 001143B9DAF0. The following error occurred:
The operation was canceled by the user. . Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: c7 04 00 00 ...

Thank you

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#2 usasma

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Posted 02 February 2006 - 10:20 AM

Based on the Event Viewer messages - I'd say that the Hub was the problem. Remove the hub and see if the problem goes away. You also may want to try zeroing out any settings in the hub.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.

#3 ed ting

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Posted 02 February 2006 - 10:39 AM

There is no way to access hub, there is no internal software built into hub. Know the hubs are ok, b/c had to use two of them when orig router went down, no problems during that time.

thanks

#4 usasma

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Posted 02 February 2006 - 11:17 AM

Some suggestions:

1) Try resetting the router
2) Try rerunning the XP network setup wizard - then using the disk to set all the systems.
3) Try disabling the wireless portion of the router.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.

#5 ed ting

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Posted 02 February 2006 - 11:26 AM

1) Have already reset router multiple times.
2)why rerun xp network setup wizard? Was hoping not to unistall reinstall tcp/ip protocol, and other protocols unless last resort.
3) why disable wireless portion? I use it occasionally, but there is no mac addresses in the wireless lease area. have turned off my laptop wireless for now.

still hoping that the half duplex has fixed it but dont know why cause I ran this very same network setup for 5+yrs with no problems. (still think it was a MS security update, think it all started right around one of the last 2 or 3 updates ago)

thanks

#6 usasma

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Posted 02 February 2006 - 09:16 PM

1) Good that's one less thing to worry about.
2) Why? - because I'm just guessing here. I've about run out of ideas!
3) See 2) :thumbsup:
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able.

- John  (my website: http://www.carrona.org/ )**If you need a more detailed explanation, please ask for it. I have the Knack. **  If I haven't replied in 48 hours, please send me a message. My eye problems have recently increased and I'm having difficult reading posts. (23 Nov 2017)FYI - I am completely blind in the right eye and ~30% blind in the left eye.<p>If the eye problems get worse suddenly, I may not be able to respond.If that's the case and help is needed, please PM a staff member for assistance.

#7 ed ting

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Posted 02 February 2006 - 09:26 PM

thanks anyway. Did not have any drops today so maybe the half duplex thing worked.

#8 Cyclica

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Posted 02 February 2006 - 10:11 PM

Hi. Good thing the half-duplex fixed out your problem, but, don't you think the cause is still there?, something like a loose connection or a defective cable?

Try to test network latency and network loss with the pathping command, i. e. "pathping 192.168.0.1" (try every IP in your network). If you find there are loss packets, then most surely there is a physical problem somewhere. A network tester could ease the task of finding where the problem is.

#9 ed ting

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Posted 03 February 2006 - 06:35 AM

Not familar with network tester. Where can I get 1? How does it work? How $$? Yes I know that the problem is still there, but I have changed cables, still think it is either the NIC, or router, but both are so new, i guess you never know. I'll try the pathping command today. thanks.

#10 ed ting

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Posted 14 February 2006 - 02:32 PM

Contacted DELL and they replaced the MB (NIC is hardwired to MB) but still having problems. Network link is still dropping randomly. I still think it is the router, but cant figure out where it could be going wrong.

#11 Cyclica

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Posted 14 February 2006 - 03:10 PM

Re-reading your posts, it came to my mind something that happened to me in the times of 10mbps hubs: I configured one of the NIC's to full-duplex, unaware of the fact that the HUB wasn't compatible with full-duplex, and, as in your case, lights started blinking and the whole network went down everytime packets were sent to/from that computer.

Are you sure all of your network hardware is full-duplex ready?

#12 Enthusiast

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Posted 14 February 2006 - 04:12 PM

I would try getting a pci nic card before replacing a motherboard. You can get one for a few dollars.

You should not have to delete the current lan connection to make another using the new nic card and in making the new connection you can make sure the settings are correct.

#13 ed ting

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Posted 14 February 2006 - 04:15 PM

Doing some checking on the HUB now. (Netgear FE104) to see if it is full duplex or not, but pretty sure it is it isnt that old and is 10/100mbs.

will post what i find, but that computer is not directly connected to the hub, another one is. Did find this piece of info though. When rebooting router and re starting each computer i checked the event log and could see that when the nic starts on all the other computers it notes that they are half duplex, but the event log on the computer that is randomly dropping network connection, it registers full duplex. i believe though that i already went through this scenerio and forced half duplex once already. will probably try it again just to be sure.

#14 ed ting

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Posted 14 February 2006 - 04:31 PM

dell already sent a rep out who swapped out the motherboard. still dropping lan connection. So pretty sure it is some other configuration problem, just cant pin it down.

#15 Cyclica

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Posted 14 February 2006 - 06:09 PM

Me thinks the problem could be in the way your network is connected. If I get it right, you have 4 computers connected to the router and the other one is connecting through the HUB. I'd run tests using only the router (too bad you can't connect all the computers to a single device), and then, only the HUB. In fact, I'd rather get a switch with at least 5 connections to hook there all of the computers; and from there, a single line to the router.




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