SBS 2003 server gets new motherboard and NIC mac address change

All of a sudden the XP Pro clients cannto get an IP address from DHCP. The
NIC is set the same but the Mac address has changed. No router just a
10./100/1000 switch. The Internal NIC was replaced with the motherboard and
therefore a new MAC. Provide a static and everything is fine. Ipconfig
/release and /renew gives Microsoft IP 169.... DHCP server is good scope is
good Most PCs are not connecting a few however do.

 

Are you saying your SBS NIC has the 169.x.x.x IP address? That is not a
valid, good IP address. You will get a 169.x.x.x IP address when a valid IP
address cannot be handed out.

Did you rerun CEICW after replacing your NIC?

 

The clients are posting the 169 address the SBS server nic is 10.24.5.10 and
is the same as it was before. Its an onboard NIC. I tried IPCONFIG /release
and /renew but the clients still do not get a 10.24.5.xxx address from the
SBS DHCP range. clients are somehow looking for the old dhcp servers onborad
nic's mac address.

Single switched environment with no other DHCP server. DHCP service was
stopped and restared and flushed all of the A records for clients out. A
couple of workstations are getting the proper address and connect fine but
after the motherboard replacement most are not getting a DHCP dished out
address. Static address on the client will work but we want to use DHCP.

 

Sorry I did not run CEICW again. Internet works fine for two desktops and if
you provide a static address - issue is all of a sudden DHCP is not working.

 

Are you by any chance using a hosts or lmhosts file?

GaryK

 

Hi Pete,

When a nic gets pulled out from under the OS, strange behaviour is the norm
;-). That's in effect what happened when you changed the board.

You've most likely got a 'ghosted' nic in the system, and getting rid of it
and then re-setting your network configuration and running the CEICW
(connect to the internet wizard) should bring things back.

Enable 'show hidden devices' in devman, and get rid of any ghosted
hardware (stuff you know doesn't exist in the new box)

1. Click Start, click Run, type cmd.exe, and then press ENTER.
2. Type set devmgr_show_nonpresent_devices=1, and then press ENTER.
3. Type Start DEVMGMT.MSC, and then press ENTER.
4. Click View, and then click Show Hidden Devices.

Delete the ghosted nic.