Dual Lan Card Simultaneous Enabled

Asked By 220 points N/A Posted on -
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HI all,

We just setup a new additional LAN Card in our POS system. The old LAN Card was used for network connections for sales text file sending to Mall Admin which has a static IP address assigned by mall admin.
 
Now we are going to connect a DSL internet connection, but the problem is the ISP will be requiring us to connect to their DHCP server. Their solution is for us to install another LAN Card for the internet connection, but when 2 LAN cards are enabled we can only use the internet, but we can't connect and send sales file to Mall admin.
 
What we are doing is to disable the DSL LAN Card so we can send the text file. Our personnel sometimes forget to disable and sometimes they disable the wrong LAN card.
 
We want the 2 LAN card enabled and working simultaneously.
 
Thanks!
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Answered By 205 points N/A #125880

Dual Lan Card Simultaneous Enabled

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Dealing with two LAN Cards with different Gateways.
 
When you have encountered problems, connecting from your LAN (Local Area Network) and into your Internet Connection working with two LAN Cards it is because, the network routes cannot identify to which of the two the traffic will be routed.
 
Intranet are configured in this way. One LAN Card for the Local Network and another one for the WAN or for the Internet Connection, which is to be called split route.
 
Basically, Local Area Networks are configured manually or its Internet Protocol (IP) is Static. Meaning, IPs, Subnet Mask, and Default Gateways are assigned manually. While on your Internet Connection most of the providers use Dynamic IPs or the Dynamic Host Configuration Protocol or the DHCP. All entries for your IP configuration are assigned dynamically.
 
It is not advisable to a split network, to assign a Default Gateway. Assigning Default Gateways in your Home Network or Local Area Network will result in routing problems.
 
Therefore, if you have assigned Default Gateway in your Home Network adapter card, remove then so that it will not conflict the routing table.
 
Follow the following steps to remove your Default Gateways:
 
  1. Click Start then Control Panel.
  2. Select Network and Internet Connection.
  3. Click Network Connection.
  4. Right Click on your Network Home Adapter Card then click Properties on the pop-up menu.
  5. Local Area Connection Properties Dialog Box appears. On the list, under General Tab, select Internet Protocol (TCP/IP) then click the Properties button.
  6. Delete all entries under the Default Gateway. No DNS server address specified.
  7. Click Ok.
  8. Click Ok once more for the Local Area Connection Properties.
 
Another way to solve this issue, is to change your metric assignments or the route sorting order. In Microsoft Windows XP, if your Automatic Metric is enabled, the route will search for the highest link speed and automatically assign a lowest metric while the lowest link speed will be assigned the highest Metric.
 
This means that if you have the high speed link network connection, the route will be sent first on the highest speed or to the lowest metric. And this is what you have encountered and the reason why this issue occurred in your network.
 
Your computer sends all traffic to your Internet Connection Adapter that is why you can’t connect to your home network without disabling the Internet Connection Adapter Card.
 
Here’s the procedure for you to follow how to change and disable the Automatic Metric in your LAN settings:
 
  1. Click Start then Control Panel.
  2. Select Network and Internet Connection.
  3. Click Network Connection.
  4. Right Click on your Network Home Adapter Card then click Properties on the pop-up menu.
  5. Local Area Connection Properties Dialog Box appears. On the list, under General Tab, select Internet Protocol (TCP/IP) then click the Properties button.
  6. Under the General Tab, Click the Advanced button.
  7. Advanced TCP/IP Settings Dialog Box pops-up.
  8. Under the IP Settings tab, click the Automatic metric check box to clear the check mark and on the Interface metric box, assign an integer number from 1 to 99. Remember that the lowest Metric is the default route.
 
Hope this helps and don’t hesitate to get in touch with me when you need help about this. I am just a click away from you! Good Luck!
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