Solved

Connecting to a default gateway on a different subnet

Posted on 2013-06-13
4
1,076 Views
Last Modified: 2013-06-13
I am setting up a test domain at my office. I have an old Windows server with 2008 as a new domain and new forest. We use a B Class subnet for our main network. I would like to configure this test domain to use a straight C network (/24).

I set up the new server to use 192.168.240.5/24. Obviously, it cannot reach our default gateway: 172.16.0.1/16.

I was told that I could list the test server's ip as the default gateway (in the server's TCP/IP connection settings) and manually add a route from the server to the default gateway. This would, theorectically, enable connectivity to the default gateway.

I've tried "route add 0.0.0.0 mask 0.0.0.0 172.16.0.1", "route add 0.0.0.0 mask 255.255.255.0", and "route add 0.0.0.0 mask 255.255.0.0 172.16.0.1". No luck.

I have verified internet connectivity when the server is on the standard (B class) subnet.

Is what I am attempting possible? Any help would be appreciated. Thanks in advance.
0
Comment
Question by:ecshelpdesk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 25

Accepted Solution

by:
Ken Boone earned 500 total points
ID: 39245441
The default gateway and any other routes default or not that you configure must have a next hop ip address of something on THAT devices network.   There are special cases where you could do recursive routing, which is what it sounds like you were told to do.  But even so at some point in the recursion it must resolve to a route that has a next hop of something on your network.  That is why its called a gateway.  It is a gateway that lets you go to another network.  So at some point you must have a layer 3 interface on the new network that can route to the existing network.
0
 
LVL 1

Author Closing Comment

by:ecshelpdesk
ID: 39245647
Thanks! That got me started on the right path:

I found an old router, disabled DHCP, plugged in the server and a test computer into two of the ports, and plugged a cable from our main network into the "Modem" slot. The router picked up a dhcp address for the WAN and I statically set the two terminals to use the new router as a default gateway. It's working fine.

Follow up, though:

I disabled DHCP because I was concerned the router would start assigning addresses over the WAN. But, thinking about, that does not seem likely. The router's DHCP service (I believe) would only be applied "downstream". It would only apply to the wireless broadcast and to client ports. It would not try to assign dhcp through the wire connected to its "Modem" port (the WAN). Does that seem correct?
0
 
LVL 25

Expert Comment

by:Ken Boone
ID: 39245667
Not sure what the router is but that sounds right.  It typically would only act as a dhcp server for the local lan and local wireless clients.
0
 
LVL 1

Author Comment

by:ecshelpdesk
ID: 39245751
Great, thanks!
0

Featured Post

NEW Veeam Agent for Microsoft Windows

Backup and recover physical and cloud-based servers and workstations, as well as endpoint devices that belong to remote users. Avoid downtime and data loss quickly and easily for Windows-based physical or public cloud-based workloads!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
Shadow IT is coming out of the shadows as more businesses are choosing cloud-based applications. It is now a multi-cloud world for most organizations. Simultaneously, most businesses have yet to consolidate with one cloud provider or define an offic…
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…

718 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question