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do you have guest tools installed on all those virtual servers ? did you try creating a Vlan Segment ?
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do you have guest tools installed on all those virtual servers ? did you try creating a Vlan Segment ?

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Guests tools are of course installed on all these VMs. I have not created a VLAN segment but is that necessary?
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Guests tools are of course installed on all these VMs. I have not created a VLAN segment but is that necessary?

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Experts,<br />
<br />
I am running Windows Server 2008 R2 Hyper-V and having issues with my VMs accessing the internet using the default network adapters. The only way they can access the internet if I change the adapter to legacy on the VM. <br />
<br />
- The server running hyper-v is an HP ML350 G5, 2 X 2.6ghz intel procs, 6 X 1TB drives, 3 X Physical NICs, 16GB RAM<br />
- This happens with multiple VMs that are running various OS's (Server 2003, Server 2008). <br />
- DNS is set correctly on the host and VMs, and they can all resolve each others names internally just fine.<br />
- The vNetwork is binded to one of the physical NICs on the server and allows external access<br />
<br />
I have a read a couple MS forum posts about this issue, but no real reason or fix to the issue. 
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Experts,

I am running Windows Server 2008 R2 Hyper-V and having issues with my VMs accessing the internet using the default network adapters. The only way they can access the internet if I change the adapter to legacy on the VM. 

- The server running hyper-v is an HP ML350 G5, 2 X 2.6ghz intel procs, 6 X 1TB drives, 3 X Physical NICs, 16GB RAM
- This happens with multiple VMs that are running various OS's (Server 2003, Server 2008). 
- DNS is set correctly on the host and VMs, and they can all resolve each others names internally just fine.
- The vNetwork is binded to one of the physical NICs on the server and allows external access

I have a read a couple MS forum posts about this issue, but no real reason or fix to the issue. 

Hyper-v guests cannot connect to internet

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Microsoft Virtual Server was a virtualization solution that facilitated the creation of virtual machines on the Windows XP, Windows Vista and Windows Server 2003 operating systems. Virtual machines are created and managed through a web-based interface that relies on Internet Information Services (IIS) or through a Windows client application tool called VMRCplus. Features included Linux guest operating system support, Virtual Disk Precompactor, symmetric multiprocessing (SMP), x64 host operating system support, the ability to mount virtual hard drives on the host machine and additional operating systems support, including Windows Vista, and a volume shadow copy writer.

Microsoft Virtual Server

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.