[AccessD] dhcp stuff

Stuart McLachlan stuart at lexacorp.com.pg
Sat Dec 16 16:54:29 CST 2006


Here's Microsoft's take on this one. Basically - don't do it.

On 16 Dec 2006 at 15:46, JWColby wrote:

> I am trying to get my router (DL-624) to be the DHCP server (which it has
> always been) and to assign static addresses to my various computers.  I have
> discovered the mac addresses, built up the list of statically assigned mac /
> ip address sets etc.  One of my machines has two 1gb NICs.  For come reason,
> one of those NICs ends up being assigned a Dynamic address even though the
> router has a mac / ip pair in the static assignment table and it is enabled.
> I have double checked everything.
> 
> The NIC that windows claims is the second port is the culprit.  If I go into
> the properties inside of windows and specifically tell it to use a given
> address (statically assigned inside of Windows) it does take that address,
> but if I tell it to dynamically acquire an address it gets the dynamic
> address that the router assigns.
> 
> The router, at this instant, has TWO IP addresses for this NIC - a
> statically assigned (now matching both in the router table and in Windows)
> and a dynamically assigned address by the router.  If I try (for example) to
> remote desktop into the dynamically assigned address the attempt fails,
> which makes sense because the actual port (mac address) is statically
> assigned (in windows and the router) to a different address.
> 
> I am wondering why the router dynamically assigns an address to that MAC
> even though there is an entry in the static address table for that MAC, and
> in fact I have told Windows to statically assign an address to that NIC to
> match that static address assigned by the router.
> 
> In essence, I can now remote desktop in (from inside of my network) to
> either nic on that machine, at the "statically assigned" ip addresses, and
> cannot remote desktop to the "dynamically assigned" ip address for the
> offending mac, so I know now which addresses are valid.  But why the dynamic
> assignment which is in fact not used by the machine?
> 
> I sure wish I understood this stuff better.
> 
> John W. Colby
> Colby Consulting
> www.ColbyConsulting.com
> 
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-- 
Stuart





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