Release IP

Hi, i am from Spain, excuse my Inglish

I have a DHCP server in my LAN with 20 days lease configure.

When I start a PC get IP from DHCP server (for example 192.168. 1.115)

If i run ipconfig /release and ipconfig /renew and run ipconfig /all the PC
get again the same IP (192.168.1.115)

How i can force the PC to get new IP from DHCP Server ?

Thanks for all and excuse my bad Inglish

Hello Zidac,

Your English is very good.

Your DHCP Server is acting the way it was designed.

When a client releases or attempts to renew it's address, the DCHP server
will generally assign the same address (if the IP address is available) based
on the PC's hardware MAC address.

If you release your address and another PC gets it, then obviously the DHCP
server will assign you a different address.

When a PC releases its address, the IP address goes into a pool of available
address that the DHCP server can assign.


--
Miguel Fra / Falcon ITS
http://www.falconits.com

"Falcon ITS" <> wrote in message
news:C09C7629-8D34-4663-BF15-...
> Hello Zidac,
>
> Your English is very good.
>
> Your DHCP Server is acting the way it was designed.
>
> When a client releases or attempts to renew it's address, the DCHP server
> will generally assign the same address (if the IP address is available)
> based
> on the PC's hardware MAC address.
>
> If you release your address and another PC gets it, then obviously the
> DHCP
> server will assign you a different address.
>
> When a PC releases its address, the IP address goes into a pool of
> available
> address that the DHCP server can assign.
>
>
> --
> Miguel Fra / Falcon ITS
> http://www.falconits.com
>
>


I would like to add, DHCP will provide the next one in sequential order. If
once released, and no other machine grabs it, since it is the next available
IP sequentially, it gives the client the same IP. If there were another
machine with an IP lower in the order, and then release this machine with
the higher IP, it will get the lower one upon an ipconfig /release and
/renew.

ICS however, does not work this way, and will randomly pick one. Believe me,
I found this out the hard way many years ago experimenting with ICS and
using static IPs for some internal machines. At one point I got an IP
conflict and couldn't understand why. After some testing I found that ICS
randomly gives them out. That was with Windows 2000. I don't know if that
was changed with ICS with subsequent OS releases, but I did find it quite
annoying. I just chalked it up to be another good reason to not use ICS in a
prod environment.


--
Ace

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Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE &
MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services

If you feel this is an urgent issue and require immediate assistance, please
contact Microsoft PSS directly. Please check http://support.microsoft.com
for regional support phone numbers.

"Bill Kearney" <> wrote in message
news: t...
>> ICS however, does not work this way, and will randomly pick one. Believe
>> me, I found this out the hard way many years ago experimenting with ICS
>> and using static IPs for some internal machines. At one point I got an IP
>> conflict and couldn't understand why. After some testing I found that ICS
>> randomly gives them out. That was with Windows 2000. I don't know if that
>> was changed with ICS with subsequent OS releases, but I did find it
>> quite annoying. I just chalked it up to be another good reason to not use
>> ICS in a prod environment.
>
> I don't know that this is an ICS problem. More like it's a failure to set
> up DHCP ranges properly and use DHCP reservations when necessary. If you
> have static devices then they should either be set up as DHCP reservations
> or your DHCP lease range should either be outside of them or setup with
> exclusions. You cannot just 'hope' that the DHCP server will not overlap
> the statically used addresses.
>
> ICS works, but I agree it's not really robust enough to be used in most
> situations. There's just too many ways for it to fail to overcome
> networking complications.


No, the problem the original poster is having has nothing to do with ICS,
therefor this thread is not an ICS problem, I added the ICS comments as an
illustration to the differences on how DHCP provides IP addresses, whether
sequentially or not. And no, you CANNOT setup a DHCP sope with ICS. That was
all. I apologize if my mentioning ICS caused any confusion.

Ace

Because i have a IntelAMT and i want to disable it

but when i disable IntelAMT in my PC, if the IntelAMT IP is the same that
the Host PC network fail

If i change the host IP in the PC network is OK

I want to force the PC to get new IP from DHCP Server

How ?