?
Solved

Dual Networks cards / connecting to seperate networks

Posted on 2011-03-04
5
Medium Priority
?
256 Views
Last Modified: 2012-05-11
I have a single pc with 2 ethernet cards (call then A & B).  The computer is running Windows XP Pro.  I have connected each ethernet card to a seperate network.  Ethernet A is set to DHCP and Ethernet B has a static IP Address.  Ethernet A get an DHCP address of: 1.1.0.206 (IP), 255.0.0.0 (SM), 1.1.0.1 (DG).  Ethernet B is static is: 1.34.67.2 (IP), 255.0.0.0 (SM).  

I can ping all deives on Ethernet A, but cannot ping anything on Ethernet B.  There are only currenty two devices on B's network, both have 1.34.67.x ip addresses.  On of the devices is a switch that has its default gateway set to itself.

Can anyone tell me what I am doing wrong here that I cannot communicate with the devices on B?  Let me know if you need any other information?  Sorry if I left any important information out I am kind of new this Dual networks cards and seperate networks.
0
Comment
Question by:PMCmikem
[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
  • 3
  • 2
5 Comments
 
LVL 34

Accepted Solution

by:
Paul MacDonald earned 2000 total points
ID: 35039164
Since both NICS have a subnet mask of 255.0.0.0, they're on the same logical network.  Change the subnet mask of one or both in order for your setup to work.
0
 

Author Closing Comment

by:PMCmikem
ID: 35039279
Thanks thats worked.  I hate to ask a dumb question, but can you explain why that worked?  You don't have to go into great detail, I just want to better understand the solution
0
 

Author Comment

by:PMCmikem
ID: 35039295
Just to inform I chnaged the Subnet Mask on Network B to 255.255.0.0.  I can now ping both networks.
0
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 35039313
The subnet mask defines what portion of the IP address identifies the network and what portion of the IP address defines the computer.

Your subnet mask (255.0.0.0) masked both IP addresses to network 1.0.0.0 so traffic to either network probably just went out the preferred NIC (NIC A).  Changing the subnet mask on NIC B (which is what I presume you did) pushed it to a different network number.  What that network number is depends on what subnet mask you used.
0
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 35039319
Right, okay so now network A is 1.0.0.0 and network B is 1.34.0.0.  Two different network numbers.
0

Featured Post

What Is Blockchain Technology?

Blockchain is a technology that underpins the success of Bitcoin and other digital currencies, but it has uses far beyond finance. Learn how blockchain works and why it is proving disruptive to other areas of IT.

Question has a verified solution.

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

Are you unable to synchronize your OST (Offline Storage Table) file with Microsoft Exchange Server? Is your OST file exceeding 2 GB size limit? In Microsoft Outlook 2002 and earlier versions, there is a 2 GB size limit for the OST file. If the file …
Sometimes people don't understand why download speed shows differently for Windows than Linux.Specially, this article covers and shows the solution for throughput difference for Windows than a Linux machine. For this, I arranged a test scenario.I…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…
Suggested Courses

770 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