DHCP serves one computer a Class B over wireless and Class A over wired

  • Thread starter Thread starter David
  • Start date Start date
D

David

OK. I used to eventually figure out how to fix this, at least long
enough to use the laptop. Not this time.

When I haven't used the laptop in a while, it boots up and gets a
Class B IP address using a class B subnet. The rest of my network is
on a Class A network. I used to be able to figure out how to get the
@#$&! thing to go back to a class A subnet and get a Class A IP
address like 10.0.0.2 so that the laptop could connect to the Internet
and I could connect to the wired computer through PC Anywhere. Now, no
Class A for the laptop, no Internet for the Laptop, and no PCanywhere
to the wired box with the laptop. THe wired box connects fine and gets
to the Internet and all is Class A OK for it.

What am I forgetting here, besides throwing the laptop out the window?

D.
 
OK. I used to eventually figure out how to fix this, at least long
enough to use the laptop. Not this time.

When I haven't used the laptop in a while, it boots up and gets a
Class B IP address using a class B subnet. The rest of my network is
on a Class A network. I used to be able to figure out how to get the
@#$&! thing to go back to a class A subnet and get a Class A IP
address like 10.0.0.2 so that the laptop could connect to the Internet
and I could connect to the wired computer through PC Anywhere. Now, no
Class A for the laptop, no Internet for the Laptop, and no PCanywhere
to the wired box with the laptop. THe wired box connects fine and gets
to the Internet and all is Class A OK for it.

What am I forgetting here, besides throwing the laptop out the window?

D.
Click to expand...

Is the class B address 169.254.x.x? If so, it indicates that:

1. The laptop's network connection is configured to obtain an IP
address automatically, and:

2. It's unable to communicate with a DHCP server on the network to get
the address.

Without knowing anything about your network setup, it's hard to say
what's wrong. The problem could be with the laptop's NIC hardware or
driver program, the network cabling, the hub/switch/router port that
laptop connects to, the device that acts as a DHCP server, etc.

I've written a web page with some suggestions that might help:

Windows XP Network Troubleshooting - Problems with Network Cards
http://www.practicallynetworked.com/sharing/troubleshoot/networkcard.htm
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
 
When you say that it gets a class B address, i assume you
are talking about one in the 169.254.x.x range?

This is automatically generated by the computer when it
is set to "obtain an address automatically" but cannot
find a DHCP server. Unfortunately, you don't give enough
details in your post to be specific. Is the laptop
wireless or wired? where do you normally get an address
from? (server/router/ISP)

You'll need to check the laptops connection to the dhcp
server. check cables, network cards, routers/hubs ports,
DHCP scope etc.

Can you set a static IP address, gateway and dns and then
ping or contact other machines/the web?

If you can give further details on your network set up
and the settings that the problem mahine uses, we may be
able to give you some more detailed help.
 
Steve Winograd said:
Is the class B address 169.254.x.x? If so, it indicates that:

1. The laptop's network connection is configured to obtain an IP
address automatically, and:

2. It's unable to communicate with a DHCP server on the network to get
the address.

Without knowing anything about your network setup, it's hard to say
what's wrong. The problem could be with the laptop's NIC hardware or
driver program, the network cabling, the hub/switch/router port that
laptop connects to, the device that acts as a DHCP server, etc.

I've written a web page with some suggestions that might help:

Windows XP Network Troubleshooting - Problems with Network Cards
http://www.practicallynetworked.com/sharing/troubleshoot/networkcard.htm
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
Click to expand...

Yes, that's the address. The laptop is wireless. It is supposed to get
the address from the Netgear Wireless Router that acts as the DHCP
server. The wired computer gets its address from the router no problem
over Ethernet. The Laptop doesn't.

Any more thoughts?

And BTW, I pulled the wireless router for now and went straight to my
DSL router for the wired computer. I'd rather connect using the DSL
router and use the wireless router as a hub that connects me to wired
and wireless. Any pointers on setup to make sure no wrong subnet
issues?

D.
 
adrian916 said:
When you say that it gets a class B address, i assume you
are talking about one in the 169.254.x.x range?

This is automatically generated by the computer when it
is set to "obtain an address automatically" but cannot
find a DHCP server. Unfortunately, you don't give enough
details in your post to be specific. Is the laptop
wireless or wired? where do you normally get an address
from? (server/router/ISP)

You'll need to check the laptops connection to the dhcp
server. check cables, network cards, routers/hubs ports,
DHCP scope etc.

Can you set a static IP address, gateway and dns and then
ping or contact other machines/the web?

If you can give further details on your network set up
and the settings that the problem mahine uses, we may be
able to give you some more detailed help.
Click to expand...

Yes, that's the IP. It's a wireless laptop and the Netgear wireless
router is the DHCP server. I tried the static IP, didn't work.

D.
 
OK, now I've got a USR wireless G kit, the new one out, the USR 5462.

My desktop connects via ethernet through the USR to the DSL modem and
sends data in and out no problem. I set everything up right but
something isn't right with the laptop. It gets an IP and says all is
well etc. But I can't get any data in or out.

The laptop also won't fully open outlook express or internet explorer
most of the time and though I have it connected to the wall outlet, the
battery is losing power like crazy instead of gaining. Now it is going
into hibernation mode.

Any idea what the deal is here?

BTW it's not using the other subnets now; it's using class C addressing.
 
(e-mail address removed) Dec 15, 5:22 pm hide options
Newsgroups: microsoft.public.windowsxp.network_web
From: (e-mail address removed) - Find messages by this author
Date: 15 Dec 2004 17:22:59 -0800
Local: Wed, Dec 15 2004 5:22 pm
Subject: Re: DHCP serves one computer a Class B over wireless and Class
A over wired
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OK, now I've got a USR wireless G kit, the new one out, the USR 5462.

My desktop connects via ethernet through the USR to the DSL modem and
sends data in and out no problem. I set everything up right but
something isn't right with the laptop. It gets an IP and says all is
well etc. But I can't get any data in or out.

The laptop also won't fully open outlook express or internet explorer
most of the time. Is there a way to totally restore the laptop (XP)
without using restore points since I don't have any restore points
left? Can I totally restore all default settings from the factory (IBM
Thinkpad R40)?
 
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