[afnog] Windows IP Conflict

[Antonio Godinho]

If you run IPCONFIG /all on the client computer you will see the IP of the 
DHCP server from where it got the address as well.

Cheers,

On Mon, 19 Dec 2005 08:57:23 +0000, Brian Candler wrote
> On Mon, Dec 19, 2005 at 07:24:42AM +0000, Maggie Yamfwa wrote:
> >    Can anyone help me.  I am running a windows 2000 DHCP server.  I have
> >    excluded a range of IP address which I have manually  assigned to
> >    servers and the rest are automatically assigned.  But some computers
> >    on the network are still picking the IP addresses from the excluded
> >    range and giving a conflict.  It also happened when I used the
> >    reservation.  There is also an access point on the LAN which is
> >    connected to ethernet switch.
> 
> On the clients, try using an ethernet sniffing tool to look at the DHCP
> OFFER packets they receive, to see (a) which DHCP server is handing 
> out the addresses, and (b) what address is being handed out. Then 
> you can find out whether your Win2K DHCP server is 
> misbehaving/misconfigured, or whether you have some other DHCP 
> server on your network that you're not aware of.
> 
> This should also work if you plug your sniffer into a hub (but not a
> switch).
> 
> Also, if your Win2K DHCP server has a request logging facility, try turning
> that on to see what is happening.
> 
> Regards,
> 
> Brian.
> 
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--
Antonio Godinho
B.Sc.,MCP, MCSE, CCNA, CCNP
Maputo
Mozambique