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Win2K Advanced Server Cable modem disconnection

Posted on 2003-03-19
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Last Modified: 2012-05-04
Hello,
I have a Server that's disconnecting the Internet Nic connection every few hours.
I've tried everything I can think of - no settings are purposely disconnecting, and I've verified that the cable modem is OK (by plugging into a stand-alone Win98 PC - connection stayed up for several days).
The server is networked to two Win98 PC's. I also disconnected the networking to try to isolate the problem - Internet connection still disconnects when no other PC's connected.
In the event viewer, I see the the following message(amongst others): "The DNS proxy agent was unable to bind to the IP address ***
This error may indicate a problem with TCP/IP networking. The data is the error code. " 
A cable modem help site has suggested that win2k advanced server must have some setting/firewall that can block dhcp. Does anyone have any ideas for me to try?
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Question by:frogboy5
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21 Comments
 
LVL 32

Expert Comment

by:jhance
ID: 8165706
Check the "simple" stuff first.

1) You may have a bad patch cable (or cables if there are more than one) between the NIC on the server and the hub/switch/router.

2) You may have a bad connection or wire between the server and the router.

3) You may have a bad network card in the server.
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Author Comment

by:frogboy5
ID: 8170242
Hi,
Thanks for responding.
However, although there is a hub between the server and the other PC's, the cable modem is connected directly into the server (via a 13m cable).
The LAN network connection to the other PC's doesn't seem to be dropping - only the Internet connection.
The cable between the modem and the server could be bad - I will try another one if necessary (unfortunately I've had this one neatly recessed by a carpenter!).
Regarding the network card - I did try swapping the connections (i.e. configuring the LAN connection to be Internet), and this didn't help.
Unless you think that the cable between the server and hub can somehow affect the internet connection, I'm not sure how replacing this might help.
Cheers.
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LVL 14

Expert Comment

by:kronostm
ID: 8172262

   
   I subscribed to this question not having the answer, but because one of my friends had the same problem and he asked me, a few months earlier, if I have a solution. Now I saw jhance's comment, but I don't agree to him, mostly because I studied my friend's problem.  
   Frogboy...
   try browsing any web page (not local), because my friend's connection was reestablished once he browsed any web page from the server.
    In my opinion this is a timeout problem (he was using win2k server, and had about 50-60 machines with different microsoft OS's).
    He's not a begginer and I trust him when he sais that the settings are ok, but anyway, I had a win2k server & about 30 stations and did't have this probl, but I was connected by optical fiber.
   Have to go.. sorry

STOP THE WAR
Kronos
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Author Comment

by:frogboy5
ID: 8173661
Hi Kronos,
Thanks for responding. However, I'm not really sure how this can help me. Firstly, when the connection drops I can't access any web site to attempt browsing. And secondly, even if this was a solution it would not be satisfactory, as I run an automated e-mail application which relies on a constant connection.
But thanks anyway - anyone have any other suggestions?
Rgds,
fb
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LVL 14

Expert Comment

by:kronostm
ID: 8179376

    frogboy...  it wasn't ment as a sollution, I just wanted to compare your probl. with the one known by me, and with browsing a web page we could confirm it's the same probl. and I could phone my friend and ask him if he found a sollution, this was the way I wanted to help you.

best regards
Kronos
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Author Comment

by:frogboy5
ID: 8180921
Hi,
Thanks again. I have tried browsing a web page when it disconnects, and unfortunately it always responds with a page not found error.
Regards
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Author Comment

by:frogboy5
ID: 8187291
Hello again,
it's been suggested that a DHCP setting might be causing disconnections. Anyone have any ideas about this?
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LVL 32

Expert Comment

by:jhance
ID: 8187527
>>>STOP THE WAR

Amen!  The world just doesn't have enough murderous tyrants!
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Author Comment

by:frogboy5
ID: 8187554
...good idea jhance, but that's not exactly what I had in mind to resolve my disconnection issue! (although it might hel[ - who knows?)
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Expert Comment

by:jhance
ID: 8187574
I just couldn't resist!  

BTW, I still think your problem is hardware related.  I.e. bad cable, bad NIC, bad hub.
0
 

Author Comment

by:frogboy5
ID: 8201940
Hi,
Update on this problem. I've now isolated as many components as I can think of by:-
a) Buying a new cable and installing - still disconnects.
b) Swapping NIC cards - still disconnects
c) Running the win2K server as stand-alone with no network connectins etc. - still diconnects.
d) Moving the internet connection to another (Win98) PC - plugging the cable modem directly into this. Doesn't disconnect.
I therefore feel that it's unlikely to be hardware or NTL -unless I'm missing something.
I'm seeing the warning below in the event viewer - does this mean anything to anyone?
"Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 0002B3C15948. The following error occured:
The semaphore timeout period has expired. . Your computer will continue to try and obtain an address on its own from the network address (DHCP) server."
Rgds.

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LVL 32

Expert Comment

by:jhance
ID: 8201967
What about your HUB or SWITCH?
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LVL 14

Expert Comment

by:kronostm
ID: 8202189

    It's not a hardware problem, as long as the server can make the request to the dhcp server of the provider, and only when it has to renew the annoncement it can't communicate (maybe a protocol problem or a filtering on dhcp protocol), or a timeout for the account (call the provider and ask them to check your account settings). Also check ALL (I know it's monstruous) your TTL settings on win2k server.
   
Stop the war
Kronos
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LVL 32

Expert Comment

by:jhance
ID: 8202686
How do you know it's not a hardware problem?

A FUNDAMENTAL principle of debugging a problem for which you do not know the cause is to continue eliminating potential sources until only the culprit remains.

You are ASSUMING that this cannot be a hardware issue when if fact that is very likely (in my EXPERT opinion) to be a prime cause.  In fact I have a defective LinkSys hub/switch that causes behavior exactly like what you are describing.


Oh, and I agree on your anti-war sentiments.  Ever since Idi Amin, Pol Pot, and Manuel Noriega were deposed the world has really lacked the most wicked of despots.  I know that Khaddafi tries but he's just to stupid to be really memorable here.  

It's great to see a first rate villian like Hussein step up to fill that role.  He's a master at genocide, mass murder, torture, and other crimes against humanity.  It's just too bad that the Israelis bombed his nuclear reactor in 1981.  Can you imagine how much more exciting this would be with atomic bombs going off all over the world?

And he's so sweet about it at the same time.  He's been responsible the the killing of millions of people from Iraq and surrounding nations and people around the world seem to love him.  What an AMAZING man!
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LVL 14

Expert Comment

by:kronostm
ID: 8203329
jhance
I really have a great respect for your expert qualities, proved by your expert points, but....

  I know this is not an hardware problem because frogboy said before, that he tried to connect the win98 PC and worked. So, only the hardware installed on the windows 2k PC can be the probl., but I remember frogboy telling "b) Swapping NIC cards - still disconnects". Do you EXPERT know any other hardware that can cause the probl?  Yeah "What about your HUB or SWITCH?" What about them? "c) Running the win2K server as stand-alone with no network connectins etc. - still diconnects.", so, there is no switch involved in this type of running and still disconnects. "
  ....now, do you EXPERT know any hardware that can cause the server to disconnect?
yeah... maybe the RAM ...  but if it's damaged, other apps should crash.
same for CPU & MOBO & ....  MOUSE & KEYBOARD  :)

Now, let me tell u what really made me angry!
Not your opinion about my opinion about your opinion made me angry. We both might be wrong, so... we are humans... we do mistakes. In fact I have the decency to say that I'm not 100% sure it's not a hardware probl.
What really made me angry was your opinion about this invasion (because it's not a war)
...if you want to find Osama bin Laden you don't bomb a whole country "maybe he's there". They all deserve to be bombed cause he's hiding there, that's the philosophy?  Or USA needed a reason (a pathetic one ... my opinion) to invade Afghanistan.
If you want to punish Saddam ( I agree that he deserve more than death) you don't invade his country and bomb everything. .... in fact not everything... not the oil fields...  major British & American oil companies won't allow this. They need those fields for later, when american "democracy" will be installed in Iraq. And another thing..... they don't bomb everybody because they need cheap workers, that's all.
    But it's not about oil either.... it's about US $ who's power weakens every day, being denied by more & more nations that don't agree USA's arrogance.
 
   What if USA's arrogance will touch your country tommorow and your family will be between the "minor casualities" ?
Or... u are one proud american? Then you have nothing to worry. U are safe behind the arrogance and ignorance of your politicians.

now I have to appologise to all the people that read this post as a technical solution to some problem.

jhance.. now I saw your "member info" ... I'm still more impressed.

best regards
Kronos
0
 

Author Comment

by:frogboy5
ID: 8209801
Hello all,
everyone's views are valid and welcome, but I'm concerned that hositilities seem to be breaking out in my question board. Being a raving pacifist, it's not exactly what I'd hoped for!
Maybe there should be a separate forum within Experts-exchange for war discussions?
This is interesting discourse, but being totally selfish doesn't progress my line disconnection problem.
Back to that issue - I really don't think it can be hardware, as I've tried to isolate everything possible.
The hub is not connected to the Internet NIC card - only LAN for the other PC connections. I think I've checked all setting in Win2K, although not being an expert I could easily have missed something.
I'm still desperate with this, so any new suggestions would be appreciated.
Namaste
FB5
 
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LVL 14

Expert Comment

by:kronostm
ID: 8209968

    have you called your isp and asked for a little check of your account and maybe... if they are not to busy  :)  they can take a look in the logs.

have to go
0
 

Author Comment

by:frogboy5
ID: 8278202
Hello again,
still don't seem to be getting anywhere with this. I have had an engineer from the cable company round again, checked all the power levels etc. which seem to be fine.
I've now moved the Win98 PC to the location of the Win2K PC, unplugged the Win2K and setup the Win98 in it's place. This is to isolate any possible problems with cable modem, cables etc. The Win98 PC has remained connected to th Internet for 2 days without disconnecting.
Therefore, the problem MUST be something to do with Win2K.
Any suggestions??
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Expert Comment

by:cempasha
ID: 8595930
This question is still open and getting old. If any of the comment(s) above helped you please accept it as an answer or split the points who ever helped you in this question. Your attention in finalising this question is very much appreciated. Thanks in advance,

****** PLEASE DO NOT ACCEPT THIS AS AN ANSWER ********

- If you would like to close this question and have your points refunded, please post a question in community support area on http://www.experts-exchange.com/Community_Support/ giving the address of this question. Thank you      

Pasha

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Expert Comment

by:LizardofOz
ID: 8935073
Hi

I have been working on a similiar problem for a customer of mine. They are running a W2k server which is using the MS DHCP service to service TCPIP details to clients connected to the internal LAN. The W2k has a second Nic which is attached to an ADSL modem providing permanent connection to their ISP. The connection regularly drops off as you have described.

I have queryed Microsoft and they have responed with a couple of ideas. One idea has been that when the Nic puts out a request for an address from a DHCP server, it sends a broadcast and waits for a response. As the ADSL modem repsonds first the Nic accepts the offer and broadcasts an acceptance for the offer. However on a W2k network, all DHCP servers must be Authorised. The MS DHCP server may be picking up the acknowledgement from the Nic for the address obtained from the ADSL modem, then broadcasts a NACK which could result in the card losing the address. The issue comes about because the ADSL modem is not an authorised DHCP server It probalby doesn't help that the ADSL modem is actually attached to the server itself.

Another response which I received from Microsoft was that a server which is running the DHCP service is obviously acting as a DHCP server. It is not a valid configuration for Nics installed on a DHCP server to obtain addresses automatically. They should be using static IP addresses. I know on a NT 4 DHCP server, the installed Nics were not allowed to request an address. They had to be assigned static addresses. It initially appeared that this had changed in W2K as it would allow you to configre a Nic installed on a DHCP server to automatically request TCPIP details. However Microsoft has told me that this is not the case.

So unfortunately as yet I have not found a work around. If I do, I'll post back what I came up with.

Thanks
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