Quick Google uncovers that if you have a gateway setup on multiple NICs, by default in Win7 it will use the NIC with the higher bandwidth.
Don Guyer Windows Systems Engineer RIM Operations Engineering Distributed - A Team, Tier 2 Enterprise Technology Group Fiserv [email protected] Office: 1-800-523-7282 x 1673 Fax: 610-233-0404 www.fiserv.com <http://www.fiserv.com/> From: Bob Fronk [mailto:[email protected]] Sent: Tuesday, June 14, 2011 9:54 AM To: NT System Admin Issues Subject: RE: Windows 7 - Multiple NIC binding order More testing shows that Windows seems to use Ping times to decide which network is "faster". The slower network has better ping times by a couple of milliseconds, however, it is less than half the bandwidth, and not the network that has first priority in the network bindings.... From: Bob Fronk [mailto:[email protected]] Sent: Tuesday, June 14, 2011 9:03 AM To: NT System Admin Issues Subject: Windows 7 - Multiple NIC binding order Windows 7 Enterprise 64bit with two 1GB NICs. (NIC 1 is internal. NIC 2 is USB dongle) Each NIC is connected to a different subnet, LAN 1 = Domain LAN. LAN 2 = Local Test network. LAN1 is the domain LAN and has a 45mbps Internet connection. LAN2 is a test network and is connected has a 20mbps Internet connection. LAN1 is 192.168.x.x. LAN2 is 10.10.x.x. Both are DHCP. Both are 1Gbit networks. I have set the binding order for network services to use NIC1(LAN 1) first. The wireless (not connected) second. NIC2 (LAN 2) third. Windows has designated LAN 1 as "Domain Network" and LAN 2 as "Work network". However, at each log on, the OS is using NIC2 for external traffic (Such as WEB, Outlook connection, etc.). I can still connect to the domain LAN, however it is not primary. I have to unplug the network cable for the OS to switch to LAN1. If I plug the cable back in, the OS will switch back to NIC2 at various intervals. I use the test network for some VMs I run on my PC for testing purposes. I need external access for these VMs, but I do not want them on the domain network. This was working fine for me until my old 100mbps USB NIC experienced a "drop and break it" incident. The new USB NIC is 1Gbit, so I am guessing that Windows sees this as a "better or faster" network and somehow makes it priority over the Domain network. Beyond setting the binding order (which I have done), does anyone know another way to force Windows to use "think" LAN1 is the best priority network? BF ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
