DHCP server assigning ip addresses, does it is pinging it before?

Not 100% sure of the DHCP assigning mechanism of the Server 2003 DHCP
service... someone can confirm me?

I'm asking that since we are migrating an old split-scope configuration (2
W2K) to a brand new Server 2003 server (no split scope anymore). This said,
we want to avoid merging both server leases on the new server, since I'm
assuming that the server will ping addresses before leasing it...

Thanks.

Claude Lachapelle
Systems Administrator, MCSE

Hello Claude,

The way from DHCP leasing has never changed. Doesn't matter if 2000 or 2003

1. During the boot process, a client computer that is configured as a DHCP
client sends out a broadcast packet called DHCPDISCOVER. This Discover packet
contains the client's computer name and Media Access Control (MAC) address
so the DHCP servers can respond to it. Basically, the Discover packet says,
"I'm looking for a DHCP server who can lease an IP address."

2. DHCP servers on the network respond to the broadcast with a DHCPOFFER.
In essence, the DHCPOFFER says, "I am a DHCP server and I have a lease for
you." If several DHCP servers respond to the request, the client accepts
the first offer that it receives.

3. The client responds via a broadcast message called a DHCPREQUEST. This
message basically says, "I accept your lease offer and would like an IP address."
If other DHCP servers made offers, they also see their lease offers were
not accepted by the broadcast message, so they rescind their offers. (They
must not like getting snubbed by a client computer.)

4. The DHCP server whose offer was accepted responds with a DHCPACK message,
which acknowledges the lease acceptance and contains the client's IP address
lease as well as other IP addressing information that you configure the server
to provide. The client is now a TCP/IP client and can participate on the
network.



Best regards

Myweb
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.

> Not 100% sure of the DHCP assigning mechanism of the Server 2003 DHCP
> service... someone can confirm me?
>
> I'm asking that since we are migrating an old split-scope
> configuration (2 W2K) to a brand new Server 2003 server (no split
> scope anymore). This said, we want to avoid merging both server leases
> on the new server, since I'm assuming that the server will ping
> addresses before leasing it...
>
> Thanks.
>
> Claude Lachapelle
> Systems Administrator, MCSE

No pinging involved.

"Claude Lachapelle" <(E-Mail Removed)> wrote in
message news2B695D7-F83F-4F30-B64F-(E-Mail Removed)...
> Not 100% sure of the DHCP assigning mechanism of the Server 2003 DHCP
> service... someone can confirm me?
>
> I'm asking that since we are migrating an old split-scope configuration (2
> W2K) to a brand new Server 2003 server (no split scope anymore). This said,
> we want to avoid merging both server leases on the new server, since I'm
> assuming that the server will ping addresses before leasing it...
>
> Thanks.
>
> Claude Lachapelle
> Systems Administrator, MCSE

This said, it is mandatory merging both old dhcp servers leases and import
them on the new one.

Thanks.

"Mike Lowery" wrote:

> No pinging involved.
>
> "Claude Lachapelle" <(E-Mail Removed)> wrote in
> message news2B695D7-F83F-4F30-B64F-(E-Mail Removed)...
> > Not 100% sure of the DHCP assigning mechanism of the Server 2003 DHCP
> > service... someone can confirm me?
> >
> > I'm asking that since we are migrating an old split-scope configuration (2
> > W2K) to a brand new Server 2003 server (no split scope anymore). This said,
> > we want to avoid merging both server leases on the new server, since I'm
> > assuming that the server will ping addresses before leasing it...
> >
> > Thanks.
> >
> > Claude Lachapelle
> > Systems Administrator, MCSE
>
>
>

You can set the DHCP server to ping an address before leasing it.
This feature is called "conflict detection".
See:
http://technet2.microsoft.com/window....mspx?mfr=true

--
Regards,
Andrei Ungureanu
www.itboard.ro

"Claude Lachapelle" <(E-Mail Removed)> wrote in
message news:334E1986-886A-4613-805D-(E-Mail Removed)...
> This said, it is mandatory merging both old dhcp servers leases and import
> them on the new one.
>
> Thanks.
>
> "Mike Lowery" wrote:
>
>> No pinging involved.
>>
>> "Claude Lachapelle" <(E-Mail Removed)> wrote in
>> message news2B695D7-F83F-4F30-B64F-(E-Mail Removed)...
>> > Not 100% sure of the DHCP assigning mechanism of the Server 2003 DHCP
>> > service... someone can confirm me?
>> >
>> > I'm asking that since we are migrating an old split-scope configuration
>> > (2
>> > W2K) to a brand new Server 2003 server (no split scope anymore). This
>> > said,
>> > we want to avoid merging both server leases on the new server, since
>> > I'm
>> > assuming that the server will ping addresses before leasing it...
>> >
>> > Thanks.
>> >
>> > Claude Lachapelle
>> > Systems Administrator, MCSE
>>
>>
>>

Thanks a lot! I was pretty sure I saw something about that in the
documentation...

"Andrei Ungureanu" wrote:

> You can set the DHCP server to ping an address before leasing it.
> This feature is called "conflict detection".
> See:
> http://technet2.microsoft.com/window....mspx?mfr=true
>