TCP/IP Woes

Logla · Feb 7, 2004, 01:37 PM

I just got myself a router to link my machines together and for a little bit of hardware firewallery.

My main machine connects to the router no problem at all. My file server does not. I have set it to automatically pick up an IP address but it doesn't. It just assigns itself an automatic 169.x.x.x address. It has 2 NICs and does this on each of them. This only happened after I tried to bridge the 2 cards onto the router. That didn't work so I removed the bridge and now this. Its driving me nuts.

Can anyone help?

Chaos · Feb 7, 2004, 02:07 PM

do you have a dhcp pool created so the machines can grab and ip ?

Logla · Feb 7, 2004, 05:16 PM

The router does that automatically. Like I say, the main machine connects and grabs an address no problem. The second machine should pull the next IP in the pool but doesn't.

Murdock · Feb 8, 2004, 05:52 AM

Quote:

Originally posted by Logla
The router does that automatically. Like I say, the main machine connects and grabs an address no problem. The second machine should pull the next IP in the pool but doesn't.

Thats suppose a router have to do, "automaticly" in my case.

The_Neon_Cowboy · Feb 8, 2004, 05:58 AM

Quote:

Originally posted by Logla
I just got myself a router to link my machines together and for a little bit of hardware firewallery.

My main machine connects to the router no problem at all. My file server does not. I have set it to automatically pick up an IP address but it doesn't. It just assigns itself an automatic 169.x.x.x address. It has 2 NICs and does this on each of them. This only happened after I tried to bridge the 2 cards onto the router. That didn't work so I removed the bridge and now this. Its driving me nuts.

Can anyone help?

what os ? if it nt/2000/2003 you may hake sure you have a dhcp cliant running as a service, make shure dhcp host is not running...

*** make sure in your network seetings for you card it say obtain ip automatically....

other wise set them your self

Logla · Feb 8, 2004, 08:20 AM

Both machines running XP Pro. All set to be set IPs automatically from the DHCP server (in this case the router).

I've checked my ISPs settings and the MAC addresses are setup correctly there. I should in theory be able to power off the cable modem, wait 5 minutes and then switch everything back on. The router should then spoof the MAC address of the pc, allocate the PC its IP address and DNS servers and then connect to the ISP using the spoofed MAC address. Its just not happening.

Even when it uses the MAC address from the main machine, the file server just doesn't get an address. I've tried changing the ports the cables are connected to but it makes no difference.

Guidoo · Feb 8, 2004, 08:39 AM

What kind of router (brand/model) are we talkingabout here...????

Guido

Logla · Feb 8, 2004, 08:45 AM

Its a NETGEAR MR314. Its a little old but should suffice for what I wanted

Should add that its a wireless router, although I won't be using the wireless for a little while yet.

Guidoo · Feb 8, 2004, 09:25 AM

couple more questions....i'm still drinking coffee....

1. If you connect the file server alone to router does it pickup ip ??

2. If it doesnt can you connect straight to your modem and pickup ip ??

If server cant pickup ip either way then i'd say problem is in tcp/ip settings of server.

If server does pickup ip then check to be sure that your modem is connected to the ethernet/internet port
and not one of the 4 ethernet ports that are side by side.

Guido

Logla · Feb 8, 2004, 10:18 AM

Answers to your questions -

1.No

2.No

I'm pretty sure this all happened after I tried to bridge the two cards in the server and it looks to have corrupted the IP stack. In the olden days of win95, I could probably just remove TCP/IP and then re-install it. No such luck with XP pro though

Chaos · Feb 8, 2004, 10:59 AM

also if the uplink port of the router is used make sure the first RJ45 port is left open

Logla · Feb 8, 2004, 11:14 AM

Quote:

Originally posted by Chaos
also if the uplink port of the router is used make sure the first RJ45 port is left open

You lost me a bit there. Here's how I have it connected. Internet port and 4 other RJ45s for the computers.

I have the cable modem connected to the Internet RJ45, the main machine connected to port 1of4 and the server connected to port 2of4.

What am I doing wrong?

Guidoo · Feb 8, 2004, 11:19 AM

Yes it does sound like a software issue. I'm going to assume you have removed the nic driver
also removed the nic in the device mgr, rebooted and reinstalled nic and driver.

If thats hasn't worked you may want to check out someplace like
Speedguide.net

Quite e few networking gurus in the forums over there.....

Guido

ps
keep us posted i'm interested in the resolution to this

Chaos · Feb 8, 2004, 11:50 AM

Quote:

Originally posted by Logla
You lost me a bit there. Here's how I have it connected. Internet port and 4 other RJ45s for the computers.

I have the cable modem connected to the Internet RJ45, the main machine connected to port 1of4 and the server connected to port 2of4.

What am I doing wrong?

Try leaving port 1 open use 2 and 3 or 2 and 4, often times the internet post is like an uplink which shares the 1st RJ45 port

Logla · Feb 8, 2004, 01:12 PM

Tried it - didn't work. I don't think the problem is with the router as the server won't pick up an address from the modem if its plugged straight into that.

PangingJr · Feb 8, 2004, 08:50 PM

Try searching Netgere Knowledgebase
http://kbserver.netgear.com/products...atic/MR314.asp

No Internet With New Router, Computer, or Adapter: MAC Spoofing
http://kbserver.netgear.com/kb_web_files/n101227.asp

Murdock · Feb 9, 2004, 04:24 AM

Quote:

Originally posted by Guidoo
What kind of router (brand/model) are we talkingabout here...????

Guido

I'm Talking about a 3Com Router.

Murdock · Feb 9, 2004, 04:28 AM

I'm Dutch what's mean the expression Woes ?

Logla · Feb 9, 2004, 09:54 AM

Quote:

Originally posted by Murdock
I'm Dutch what's mean the expression Woes ?

see here

Logla · Feb 9, 2004, 09:58 AM

Quote:

Originally posted by panging
Try searching Netgere Knowledgebase
http://kbserver.netgear.com/products...atic/MR314.asp

No Internet With New Router, Computer, or Adapter: MAC Spoofing
http://kbserver.netgear.com/kb_web_files/n101227.asp

Checked all that to no avail. I'm convinced that the problem doesn't lie with the router - more the server itself as I have the same problem if I plug it directly into the modem. This only started after I tried to bridge the servers two network cards. It was working before that. The server also doesn't talk to the client pc even if connected directly with a crossover cable and static addresses.

I've removed the cards in device manager but this didn't work either. I'm ready to rebuild the server but really don't want to go that far if there is an easier fix.

The_Neon_Cowboy · Feb 9, 2004, 10:06 AM

man to bad you way to far way lol .... It's really hard to work in the blind

PangingJr · Feb 9, 2004, 11:37 AM

okay Logla if the server is still there, try resetting its TCP/IP and all related components to a clean state and see if it helps..

Open the Run box and enter the below command and hit enter.

netsh interface ip reset resetlog.txt

and Reboot, then try connecting with the others again.

note-- you can see what's the command do to your registry in the "resetlog.txt",
and it will be in C:\Documents and Settings\<your user ID>,

Logla · Feb 9, 2004, 06:07 PM

OK NOW I'M REALLY REALLY PEED OFF!

As I work as a "support technician" (a joke of a title considering how deskilled I have become since starting this job 5 years ago) I learned that one of the golden rules of networking is to make sure the patch cables are working.

Now had I tried 3 different cables on the server - all of which I assumed to be working as they had been before. Hence I didn't try them in the main rig.
In a moment of inspiration I decided to try the cable from the rig, in the server. Lo and Behold it picked up an address no problem. internet access and everything was wonderfull. So I tried one of the 'faulty' cables in the rig - and it worked fine. Swapped the cables back over and the server could not pick up an address. swapped them over again just to make sure and I got the same results.
None of the 3 cables I had tried in the server, worked in the server but worked in the main rig. They are all cat5e cables I nicked from the office sometime ago (they were surplus stock that was going to get binned due to a new win2000 roll out - so I didn't steal them really). I'm really confused by this, especially as the server has 2 different NICs - one on board intel and a PCI 3Com card.
Anyway I've swapped the cables over and everything is good and working now.

Thanks for your help guys.

Wierd Wierd Wierd.