Well, I solved it, but only by experimentation. Probably my ignorance, but my
overall impression is that guidance on the use of guest OS's and networking
in a virtual environment could be improved. Here's what I had to do to get my
two guest OS's to connect to each other:
In the parent partition (the Windows Server2008 Hyper-V server), the two
network adapters, the ones which Hyper-V manager added, one for each guest OS
in my case, (these adapters are the ones with TCP/IP properties enabled), had
to be set to "obtain IP addresses automatically", and then in the guest OS I
had to set the IP addresses of the network adapters to the fixed IP addresses
That was it. Doesn't seem to have any problems after that. For the life of
me I could not find any guidance in either of two Hyper-V books I bought, or
on the MS technet sites, or on the SBS2008 sites (for how to set up SBS2008
in a virtual environment).
Maybe this is not the correct way to do it, but it seems to be working now.
> Hi gs-nj,
> "gs-nj" <gsnj@newsgroup> wrote
> > I have it partially figured out. Host side is Windows Server 2008 with
> > Hyper-V. Guest is Windows Server 2008 x64. Originally after installing the
> > second guest OS I did not add the Integration Services (Hyper-V said it
> > was
> > running on the guest OS), but after I added the Integration Services for
> > the
> > 2nd guest, I could connect to the network adapter (using synthetic
> > adapter).
> > I still have a bungled up network, cannot ping from second guest to first
> > guest (which is Small Business Server 2008) or from either first guest or
> > second guest to the physically separate ISA server which works as my
> > firewall. The setup was working yesteday before I added the second guest
> > OS.
> The setup had worked before and after adding an guest to Hyper-V the VMs
> network communication is gone ?
> If this is correct, there is definitely something missconfigured during the
> installation of the new VM. Check your external network settings again.
> for crosscheck (assume your virtual switch is working here) :
> when both VMs are connected to the same virtual network switch ....
> + have set correct IP address
> + if synthetic adapter are in use - no issues detected in device manager
> (ICs are installed)
> + firewalls from OS of VMs are not blocking "ping" (turn off for testing)
> you MUST be able to communicate with each other and or external
> clients/servers :-)
> > I'm baffled for now, any suggestions would be appreciated.
> PS : ISA server, you could check the firewall rules if the "ping" protocol
> is allowed (destination -> local host) which is disabled per default .
> Let me know when you face any further issues.