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Solve : Dual NIC Dynamic/Static Internet issue? |
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Answer» Trying to figure out an issue with a Windows XP Pro SP3 system I have with Dual NICs. Problem is that if the 2nd NIC is enabled with local static IP, my browser is then unable to surf the internet. Its almost like the browser IE is trying to go through the 2nd NIC which has no gateway and no DNS. Do I REALLY need to specify for IE to use NIC 1 instead of NIC 2? I thought by default it should stick with the only gateway and DNS available? Reason for 2 NICs is to keep static private network (somewhat) isolated from regular dhcp dynamic network. This system is connected to my private network as well as my regular network used for internet access. Static private network is mainly for extra level of security and to be as isolated as possible from the WWW. I have been enabling and disabling the 2nd NIC in this system because having both live all the time would defeat the security purpose of dual NICs. Your suggestion that the 192.168.100.x could conflict is an interesting detail. I will drastically change the network to 130.0.0.x with subnet 255.255.255.0 and NO GATEWAY for Static IP configured NIC and see if that makes it behave better. The IP range won't be the problem, not with a 255.255.255.0 subnet.Quote from: Computer_Commando on January 17, 2011, 11:48:19 AM Don't know why you have 2 NICS, but I don't like the IP for NIC2. Sorry, I don't understand where you're coming from here. If OP has set the IP manually how could it assign a gateway? (I'm not trying to fight, I'm trying to understand your thought process)Sid... I think you are right on the money!!!, although still dont understand why IE would try to use a NIC with no gateway configured. With only one gateway present, it should just use that gateway no matter how many other network connections there are that are lacking a gateway config. But if the network speed rules out over the logic of a single gateway config then YOUR CORRECT. We will find out when I get home tonight and check this out. This below has a statement that might be the cause if it is an Automatic Metric Problem with XP. The local static network is screaming 1000mbps and the internet connection is going through a 100mbps NIC with a broadband connection of 20mbps down and 12mbps up. The automatic metric feature looking for the faster connection would pick the 2nd NIC which has no gateway and so internet connection with IE is broken with it enabled. The Automatic Metric feature can be useful when the routing table contains multiple routes for the same DESTINATION. For example, if you have a computer with a 10 megabit (Mb) network interface and a 100 Mb network interface, and the computer has a default gateway that is configured on both network interfaces, the Automatic Metric feature assigns a higher metric to the slower network interface. This feature can force all of the traffic that is destined for the Internet, for example, to use the fastest network interface that is available. The real test will be tonight when I go home and change the Advanced Metric as you suggested. Sure sounds like a valid cause!!! Here is the link for more info, in case anyone wants to read further about Automatic Metric's: HTTP://support.microsoft.com/kb/299540Oddly enough that is what it was. Automatic Metric was grabbing the faster GIGABIT network instead of the slower 100mbps network side with the gateway with broadband ISP. Many thanks!!!Quote from: DaveLembke on January 18, 2011, 11:14:50 PM Oddly enough that is what it was. Automatic Metric was grabbing the faster gigabit network instead of the slower 100mbps network side with the gateway with broadband ISP. Many thanks!!! No worries. I've had this happen to me a few times on servers as well. *Does victory dance* |
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