Odd LAN problem with XP Pro

[Guest]

Just slicked a laptop at work and installed XP Pro from scratch. DHCP will
not register an IP address. There are zero received packets, when I look at
LAN adaptor, just outgoing packets.

So I figure my on-board lan card is DOA and install a PC-Card NIC. Same
problem, won't register DHCP and zero rx packets. Any ideas appreciated.

BTW, before installing XP Pro the unit had the same problem. I'm sure it's
a software switch, but I sure can't find it. IPCONFIG comes up zip.

 

[Robert L [MS-MVP]]

it could be hardware settings such as nic and switch issue.

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[Guest]

back to basics... need more information...

have you done the following?

Got a physical link indication light active? on both the NIC and the
switch/port?
changed cat5 cables? (making sure to use straight through cables from your pc)
made sure DHCP is running on your segment of the network?
tried to statically assign an IP address to test network connectivity?

Taoto
CISSP, NCSA, CCNP, MCSE, Server+, Network +, A+

 

[Guest]

I'm at home recovering from surgery andd brought the laptop home with me as a
project. So I'm using it on my cable modem at the house. I connect up fine
with the home computer and have used as many settings as I can move over to
the laptop to test it, still no go.

I get l link and activity lights on both my on-board nic and the PC-Card nic
as well as the cable modem.

I have tried three Cat 5 cables.

DHCP is working. I'll switch off the cable modem and have it assign a new
IP when I turn it back on after 5 minutes. I get a new IP address.

Reading further down on the list, using the new XP command I've dumped the
winsock stack and let the computer rebuild it.

Still on either the motherboard NIC or my PC Card nic, my machine will
continue to show zero bytes received by the NIC while lots of packets going
out.

Any ideas?

 

[Chuck]

I'm at home recovering from surgery andd brought the laptop home with me as a
project. So I'm using it on my cable modem at the house. I connect up fine
with the home computer and have used as many settings as I can move over to
the laptop to test it, still no go.

I get l link and activity lights on both my on-board nic and the PC-Card nic
as well as the cable modem.

I have tried three Cat 5 cables.

DHCP is working. I'll switch off the cable modem and have it assign a new
IP when I turn it back on after 5 minutes. I get a new IP address.

Reading further down on the list, using the new XP command I've dumped the
winsock stack and let the computer rebuild it.

Still on either the motherboard NIC or my PC Card nic, my machine will
continue to show zero bytes received by the NIC while lots of packets going
out.

Any ideas?

Where is DHCP working? Your original post said "won't register DHCP". The
cable modem acts as a bridge - it simply connects the ISPs network to the device
connected to it (computer or router), and lets the ISPs DHCP server assign an ip
address to that device.

You say that you connect fine with the home computer. When you move over to the
laptop to test it, are you powering the cable modem down each time?

Do you have a router connected to the modem, or are you alternately connecting
the home computer (desktop) and laptop?

Remember, cable modems register the device connected to them by MAC address.
You have to power the cable modem off, then change what's connected to it, then
power the cable modem on, and then the device connected to the cable modem.

Cheers,
Chuck
Paranoia comes from experience - and is not necessarily a bad thing.

 

[Guest]

Thanks for the reminder.

I powered down the cable modem, powered down the laptop, hooked them up with
cat 5, powered up the cable box and then the computer.

the laptop nic will search for 30 minutes waiting to be assigned an IP
address without finding one. There is zero received packets by the nic, but
dozens sent out. I can see activity on both the lan port and the cable modem
port.

When, however, I put the house computer back on the system and power both
up, the tower works fine.

 

[Chuck]

Thanks for the reminder.

I powered down the cable modem, powered down the laptop, hooked them up with
cat 5, powered up the cable box and then the computer.

the laptop nic will search for 30 minutes waiting to be assigned an IP
address without finding one. There is zero received packets by the nic, but
dozens sent out. I can see activity on both the lan port and the cable modem
port.

When, however, I put the house computer back on the system and power both
up, the tower works fine.

So was I correct, you're swapping the house computer and laptop, alternately
connected to the cable modem?

If so, with the house computer connected and working:
1) Run "ipconfig /release" from a command window.
2) Power down the house computer and cable modem.
3) Connect the laptop.
4) Wait 5 - 10 minutes.
5) Power up the cable modem.
6) Power up the laptop.

You've tried two NICs in the laptop, with no success. Have you tried the laptop
on any other network?

You might get a useful answer from the comp.dcom.modems.cable newsgroup.

Cheers,
Chuck
Paranoia comes from experience - and is not necessarily a bad thing.