XP Mode network does not work in bridged mode
I have XP Mode running on Win7 Pro 64-bit. The host notebook computer has two NICs: an Intel 82577LC gigabit Ethernet and an Atheros AR9285 wifi. When I create a network interface in the VM to bridge with the Intel Ethernet NIC, it does not communicate. It reports a connection, but it has a yellow exclamation mark and fails to get DHCP. If I specify valid IP settings (instead of using DHCP), it still fails to communicate. The Atheros wifi NIC bridges successfully; it's just the Ethernet NIC that won't bridge. I've tested the situation where I disable the host's wifi (so only the Ethernet is working), and I set a single network device in the VM using NAT mode. This works correctly, and the VM gets a 192.168.x.x address. I can browse the web, etc, but I can't use my business applications through NAT. I need to get bridged mode working so the VM can use a valid LAN address. I've updated the host's Intel Ethernet NIC driver to the latest version. I've also completely uninstalled and reinstalled the WinXP mode components. Still, I've been unable to get the Ethernet connection to work in bridged mode.
October 28th, 2010 4:52pm

In case it's necessary, here's the ipconfig /all from both the host and the VM. I currently have a single adapter on the VM, set to the host's Ethernet NIC. Win7 HOST: Windows IP Configuration Host Name . . . . . . . . . . . . : jorgee_nb Primary Dns Suffix . . . . . . . : corp.centralgraphics.ca Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : corp.centralgraphics.ca Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : corp.centralgraphics.ca Description . . . . . . . . . . . : Intel(R) 82577LC Gigabit Network Connecti on Physical Address. . . . . . . . . : 00-23-18-24-64-86 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 172.16.18.160(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.240.0 Lease Obtained. . . . . . . . . . : Friday, October 29, 2010 11:07:32 AM Lease Expires . . . . . . . . . . : Saturday, November 06, 2010 11:07:32 AM Default Gateway . . . . . . . . . : 172.16.16.16 DHCP Server . . . . . . . . . . . : 172.16.16.172 DNS Servers . . . . . . . . . . . : 172.16.16.5 172.16.16.2 64.201.167.193 Primary WINS Server . . . . . . . : 172.16.16.2 NetBIOS over Tcpip. . . . . . . . : Enabled Wireless LAN adapter Wireless Network Connection: Connection-specific DNS Suffix . : corp.centralgraphics.ca Description . . . . . . . . . . . : Atheros AR9285 Wireless Network Adapter Physical Address. . . . . . . . . : 00-26-B6-EC-8E-E2 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 172.16.18.243(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.240.0 Lease Obtained. . . . . . . . . . : Friday, October 29, 2010 10:55:29 AM Lease Expires . . . . . . . . . . : Saturday, November 06, 2010 10:55:28 AM Default Gateway . . . . . . . . . : 172.16.16.16 DHCP Server . . . . . . . . . . . : 172.16.16.172 DNS Servers . . . . . . . . . . . : 172.16.16.5 172.16.16.2 64.201.167.193 Primary WINS Server . . . . . . . : 172.16.16.2 NetBIOS over Tcpip. . . . . . . . : Enabled Tunnel adapter isatap.corp.centralgraphics.ca: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : corp.centralgraphics.ca Description . . . . . . . . . . . : Microsoft ISATAP Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Tunnel adapter 6TO4 Adapter: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft 6to4 Adapter Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Tunnel adapter Teredo Tunneling Pseudo-Interface: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes WinXP VM: Windows IP Configuration Host Name . . . . . . . . . . . . : VirtualXP-22741 Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Ethernet: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Intel 21140-Based PCI Fast Ethernet Adapter (Generic) Physical Address. . . . . . . . . : 00-03-FF-ED-8E-E2 Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Autoconfiguration IP Address. . . : 169.254.17.161 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . :
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October 29th, 2010 11:15am

It turns out the ShrewSoft DNS Proxy service was the cause of this problem. This computer uses the 64-bit ShrewSoft VPN client, and when I disable that Windows service, Windows XP mode can bridge with the Ethernet connection.
November 1st, 2010 2:06pm

The problem has somehow resurfaced (it actually came back a few weeks ago, but I hadn't had time to look into it until now). I've made sure the Shrewsoft VPN DNS proxy service is still disabled. What's more, the problem is also happening on a desktop machine as well, which doesn't have any VPN client installed. It was working until earlier this week. The desktop is an HP Z400 workstation, about a month old. The NIC is a Broadcom NetXtreme Gigabit. WinXP Mode can access the Internet just fine when it has an adapter in NAT mode, but when I switch it to bridged, it can't get DHCP, and static IP settings don't allow any communication either.
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December 10th, 2010 12:14pm

I've traced the problem to the use of IP phones at my office. They're Mitel phones that plug into the network jack at a desk, and provide a bridged Ethernet port in the back for the computer to plug into. On the affected computers in my office, if I plug the computer directly into the wall jack, WinXP bridged networking works correctly. Unfortunately this isn't the whole story, since there are at least as many working computers plugged into IP phones as there are malfunctioning ones. Also, if I take a working computer to the desk of a computer that can't use bridged WinXP networking, that working computer still works. Therefore it seems to be some combination of computer and phone that causes WinXP's bridged networking to fail. All of the phones are the same model, and some hardware revisions both work and don't work with given computers. At least I feel I'm getting closer to the root of the problem. I'm not sure if MTU is a factor in this, or VLANs (since the phones use VLAN tagging to separate data and voice traffic), or any other number of issues I'm not even aware exist.
December 13th, 2010 2:37pm

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