Dual IP addresses on 1 NIC

  • Thread starter Thread starter PMG
  • Start date Start date
P

PMG

Forgive me if this has been asked before.

I require to connect to a dedicated line to our head office mainframe which
requires an IP address of 10.44.247.x. The computer also connects via the
same hub to the internet via ADSL in the usual 192.168.10.100 etc.

How can I configure W2000 to cater for both connections? There is one NIC.

Many thanks for any help that comes!

Peter ( S Africa)
 
If you open TCP/IP properties of the network card and click on the advanced
button you should be able to add additional IP addresses.

Best regards,

Frank Szita [MSFT]

This posting is provided "AS IS" with no warranties, and confers no rights.
 
THis has IP Settings (no entry allowed), DNS, WINS, Options, where does one
enter the additional IP address?

Thanks
 
Buy another Nic,...they are cheap.

Buy another Hub,...they are also cheap

Keep the two physically separated.

Make sure the Nic that the machines needs for DNS & WINS is set to be the
highest in the binding order. A machine can only have one Default
Gateway,..associate it with the NIC facing the Internet. The other NIC will
not have a DFG.

157025 - Default Gateway Configuration for Multihomed Computers
http://support.microsoft.com/default.aspx?scid=kb;en-us;157025&Product=win2000

272294 - Active Directory Communication Fails on Multihomed Domain
Controllers
http://support.microsoft.com/default.aspx?scid=kb;en-us;272294

191611 - Symptoms of Multihomed Browsers
http://support.microsoft.com/default.aspx?scid=kb;EN-US;191611

Microsoft Windows XP - Multihoming Considerations
http://www.microsoft.com/resources/documentation/windows/xp/all/reskit/en-us/prcc_tcp_qpzj.asp?


--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


PMG said:
THis has IP Settings (no entry allowed), DNS, WINS, Options, where does one
enter the additional IP address?

Thanks

"Frank Szita [MSFT]" said:
If you open TCP/IP properties of the network card and click on the advanced
button you should be able to add additional IP addresses.

Best regards,

Frank Szita [MSFT]

This posting is provided "AS IS" with no warranties, and confers no rights.
Click to expand...
Click to expand...
 
Thanks very much. This seems to be the soundest advice I have yet received.
I shall try it. Not sure what you mean by setting the DNS etc. (Sorry!)

Peter.
(e-mail address removed)


Phillip Windell said:
Buy another Nic,...they are cheap.

Buy another Hub,...they are also cheap

Keep the two physically separated.

Make sure the Nic that the machines needs for DNS & WINS is set to be the
highest in the binding order. A machine can only have one Default
Gateway,..associate it with the NIC facing the Internet. The other NIC will
not have a DFG.

157025 - Default Gateway Configuration for Multihomed Computers
http://support.microsoft.com/default.aspx?scid=kb;en-us;157025&Product=win2000

272294 - Active Directory Communication Fails on Multihomed Domain
Controllers
http://support.microsoft.com/default.aspx?scid=kb;en-us;272294

191611 - Symptoms of Multihomed Browsers
http://support.microsoft.com/default.aspx?scid=kb;EN-US;191611

Microsoft Windows XP - Multihoming Considerations
http://www.microsoft.com/resources/documentation/windows/xp/all/reskit/en-us/prcc_tcp_qpzj.asp?


--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


PMG said:
THis has IP Settings (no entry allowed), DNS, WINS, Options, where does one
enter the additional IP address?

Thanks

"Frank Szita [MSFT]" said:
If you open TCP/IP properties of the network card and click on the advanced
button you should be able to add additional IP addresses.

Best regards,

Frank Szita [MSFT]

This posting is provided "AS IS" with no warranties, and confers no rights.
Click to expand...
Click to expand...
Click to expand...
 
PMG said:
Thanks very much. This seems to be the soundest advice I have yet received.
I shall try it.
Click to expand...

I liked to keep things simple and straight forward.
Not sure what you mean by setting the DNS etc. (Sorry!)
Click to expand...

Typically your DNS Server is your Active Directory DNS (on the Domain
Controller) which then uses the ISP's DNS as a Forwarder in the Forwarders
List in your DNS Config. This DNS Server is obviously on the LAN and not
on the Internet, so the Nic that faces the LAN must be first in the binding
order. The Nic facing the Internet would not be first in the order and
would not even need a DNS setting at all. If both Nics face the LAN (but on
different subnets) then the Nic that has the most direct path to the AD/DNS
should be first in the binding order.

The binding order is set by:

1. Properties of "Network Places"
2. Pick "Advanced" from the top menu
3. Pick "Advanced Settings..." from the dropdown menu
4. The upper box is the binding order, it should be obvious what to do from
there.
 
PMG said:
Thanks very much. This seems to be the soundest advice I have yet received.
I shall try it. Not sure what you mean by setting the DNS etc. (Sorry!)
Click to expand...

No, it's not really -- if the two machines are
really on the same broadcast domain (hub)
it will help little if any more than just adding
the IP address and perhaps touching up the
routing table.

On every NIC runing IP the IP properties allow
you to press Advanced button and on the left
most tab is the place to add more IP addresses.

You likely need to add a MANUAL (static) route
to that network (or group of networks).

Note, this is NOT the same as adding another
"default gateway" -- you can really only have
one (active) default gateway at a time even
though you can configure multiples as backup.

A command (line) such as this will add the
route:

route add 10.44.247.0 mask 255.255.255.0 GWAddress

GWAddress = the router to the mainframe
(or the mainframe if it is acting as a router)

CAUTIONARY NOTE: many companies would
have a policy AGAINST connecting their mainframe
or even their networks to the Internet this way.

In some companies it is a "termination offense" so
make sure you have permission/authorization. <really>
 
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