Can DHCP Do This?

Is it possible to configure DHCP to assign a NIC multiple IP addresses
on separate logical subnets?

For example, I want to set up a reservation for MAC address
00-15-1a-45-04-bb. I want the NIC to have two addresses 10.10.0.10/16
and 192.168.2.200/24

Is this possible to do with DHCP?

If not, is there a way to configure things so that the client gets one
address for the NIC from DHCP and another (static) address is
configured manually?

Thanks,

--
Matt Hickman

how can a client with one NIC and thus on one subnet have two IP addresses
from different subnets? and why? am I missing something here?

--

Cheers,
(HOPEFULLY THIS INFORMATION HELPS YOU!)

# Jorge de Almeida Pinto # MVP Windows Server - Directory Services

BLOG (WEB-BASED)--> http://blogs.dirteam.com/blogs/jorge/default.aspx
BLOG (RSS-FEEDS)--> http://blogs.dirteam.com/blogs/jorge/rss.aspx
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* This posting is provided "AS IS" with no warranties and confers no rights!
* Always test before implementing!
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"Matt Hickman" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> Is it possible to configure DHCP to assign a NIC multiple IP addresses
> on separate logical subnets?
>
> For example, I want to set up a reservation for MAC address
> 00-15-1a-45-04-bb. I want the NIC to have two addresses 10.10.0.10/16
> and 192.168.2.200/24
>
> Is this possible to do with DHCP?
>
> If not, is there a way to configure things so that the client gets one
> address for the NIC from DHCP and another (static) address is
> configured manually?
>
> Thanks,
>
> --
> Matt Hickman
>

I don't know if DHCP can do that but I suspect you might try using a
superscope --> http://support.microsoft.com/kb/161571 but I've never
tried it and what you're asking about is pretty weird. Usually you put
two network cards if you want your computer to belong to two subnets
unless you're talking about certain kinds of webservers. It's also
possible to manually assign multiple IP addresses to an adapter -->
http://www.loadtestingtool.com/help/how-setup-ip.shtml
Let us know what you come up with.

Joe


Jorge de Almeida Pinto [MVP - DS] wrote:
> how can a client with one NIC and thus on one subnet have two IP addresses
> from different subnets? and why? am I missing something here?
>
> --
>
> Cheers,
> (HOPEFULLY THIS INFORMATION HELPS YOU!)
>
> # Jorge de Almeida Pinto # MVP Windows Server - Directory Services
>
> BLOG (WEB-BASED)--> http://blogs.dirteam.com/blogs/jorge/default.aspx
> BLOG (RSS-FEEDS)--> http://blogs.dirteam.com/blogs/jorge/rss.aspx
> ------------------------------------------------------------------------------------------
> * This posting is provided "AS IS" with no warranties and confers no rights!
> * Always test before implementing!
> ------------------------------------------------------------------------------------------
> #################################################
> #################################################
> ------------------------------------------------------------------------------------------
> "Matt Hickman" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) oups.com...
> > Is it possible to configure DHCP to assign a NIC multiple IP addresses
> > on separate logical subnets?
> >
> > For example, I want to set up a reservation for MAC address
> > 00-15-1a-45-04-bb. I want the NIC to have two addresses 10.10.0.10/16
> > and 192.168.2.200/24
> >
> > Is this possible to do with DHCP?
> >
> > If not, is there a way to configure things so that the client gets one
> > address for the NIC from DHCP and another (static) address is
> > configured manually?
> >
> > Thanks,
> >
> > --
> > Matt Hickman
> >

In news:(E-Mail Removed) oups.com,
Matt Hickman <(E-Mail Removed)> stated, which I commented on below:
> Is it possible to configure DHCP to assign a NIC multiple IP addresses
> on separate logical subnets?
>
> For example, I want to set up a reservation for MAC address
> 00-15-1a-45-04-bb. I want the NIC to have two addresses 10.10.0.10/16
> and 192.168.2.200/24
>
> Is this possible to do with DHCP?
>
> If not, is there a way to configure things so that the client gets one
> address for the NIC from DHCP and another (static) address is
> configured manually?
>
> Thanks,

NO, DHCP will not assign multiples unless both NICs are on the same switch
(segment) or on different segments with a DHCP server on each segment or
with IP helpers.

UI'm not sure of your intensions, that is whether you want mulitple
hostmames (DNS) or if you want multiple NetBIOS names. I'm as curious about
this just as well as the others here.

If you want to assign multiple NetBIOS names, try this ->
How can I define multiple NetBIOS names for a machine?
http://www.windowsitpro.com/Articles...layTab=Article

However, if you create an Alias for the machine with a different IP and a
CNAME pointing back to the original, that may not work either"
Connecting to SMB share on a Windows 2000-based computer or a Windows Server
2003-based computer may not work with an alias name
http://support.microsoft.com/?id=281308

If you are trying to mess with a DC to do this, forget it or numerous issues
will result.

So it totally depends on what you're trying to do...

--
Ace
Innovative IT Concepts, Inc (IITCI)
Willow Grove, PA

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft MVP - Directory Services
Microsoft Certified Trainer

Having difficulty reading or finding responses to your post?
Instead of the website you're using, I suggest to use OEx (Outlook Express
or any other newsreader), and configure a news account, pointing to
news.microsoft.com. This is a direct link to the Microsoft Public
Newsgroups. It is FREE and requires NO ISP's Usenet account. OEx allows you
to easily find, track threads, cross-post, sort by date, poster's name,
watched threads or subject.
It's easy:

How to Configure OEx for Internet News
http://support.microsoft.com/?id=171164

Infinite Diversities in Infinite Combinations
Assimilation Imminent. Resistance is Futile
"Very funny Scotty. Now, beam down my clothes."

The only constant in life is change...

Jorge de Almeida Pinto [MVP - DS] wrote:
> how can a client with one NIC and thus on one subnet have two IP addresses
> from different subnets? and why? am I missing something here?
>
I do this manually in order to access various headless devices on my
LAN that are configured with IP addresses that are not easily
modifiable - or have default addresses which I'd rather not change
every time I reset them. Example: a wireless bridge that has an IP of
192.168.1.201, some other headless device has an address of
192.168.100.1, while the default gateway is on 172.16.0.1.

By setting up multiple IP addresses on my NIC for the corresponding
subnets, I can access multiple such devices without dedicating a NIC or
resetting my IP address every time I want to access the device..

Note that only layer three devices even look at the IP address, so
using multiple, non-routable, logically isolated subnets within a
physical subnet is transparent to bridges, switches, hubs et al.

IIRC, the term for assigning multiple IP addresses to a single NIC is
"virtual IP addresses" It is something Windows has been able to do
since at least the NT days (and very useful for its IIS). In XP it is
configured in the "IP Addresses" section of the "Advanced TCP/IP
Settings" tab. And there is nothing to prevent the IP addresses being
on different subnets -- XP even facilitates the process by allowing
differing subnet masks for each IP address.

If you think about it, VPNs and VLANs are simply specialized
implementations of this capability.

--
Matt Hickman

In news:(E-Mail Removed) oups.com,
Matt Hickman <(E-Mail Removed)> stated, which I commented on below:
> Jorge de Almeida Pinto [MVP - DS] wrote:
>> how can a client with one NIC and thus on one subnet have two IP
>> addresses from different subnets? and why? am I missing something
>> here?
>>
> I do this manually in order to access various headless devices on my
> LAN that are configured with IP addresses that are not easily
> modifiable - or have default addresses which I'd rather not change
> every time I reset them. Example: a wireless bridge that has an IP
> of 192.168.1.201, some other headless device has an address of
> 192.168.100.1, while the default gateway is on 172.16.0.1.
>
> By setting up multiple IP addresses on my NIC for the corresponding
> subnets, I can access multiple such devices without dedicating a NIC
> or resetting my IP address every time I want to access the device..
>
> Note that only layer three devices even look at the IP address, so
> using multiple, non-routable, logically isolated subnets within a
> physical subnet is transparent to bridges, switches, hubs et al.
>
> IIRC, the term for assigning multiple IP addresses to a single NIC is
> "virtual IP addresses" It is something Windows has been able to do
> since at least the NT days (and very useful for its IIS). In XP it is
> configured in the "IP Addresses" section of the "Advanced TCP/IP
> Settings" tab. And there is nothing to prevent the IP addresses being
> on different subnets -- XP even facilitates the process by allowing
> differing subnet masks for each IP address.
>
> If you think about it, VPNs and VLANs are simply specialized
> implementations of this capability.

I agree that Windows will handled multiple IPs. I forget what the limit is,
but for DCs, if you go past 15, it will create problems. But as for DHCP
directly offering multiple IPs for a given physical NIC, no it doesn't,
unless you put together some sort of VLAN solution for it to do so.

Ace