3rd May 07:01
a virtual server is losing connectivity
This problem is happening to us currently. Here is some significantly
more detailed information:
We have 3 VS2005 MSDN servers that we use to house a testing/bug
tracking environment. We have never used any large-scale virtual server
technologies like this (we've had a couple one-off VMWare Workstation
and VirtualPC installs, but not like this).
Currently, we only have two Virtual Machines installed and running.
While attempted to copy data from the Virtual Machine to the host via
RPC, all network connectivity will drop (easy to tell, web UI stops
responding and RDP goes dead, can't ping or otherwise connect to host).
After looking at it, we realized that in the ARP table the MAC address
for the default gateway is set to the MAC address on the physical
computer, and the default gateway has been replaced with the DHCP IP of
the virtual machine! After a reboot, all network functionality comes
The server's TCP/IP info is set statically, with a DHCP server on a
different VLAN in the same domain. All the required ports are open and
connectivity is fine (otherwise it wouldn't work after reboot of
server). This is happening on one server, but that is because the
other two are idle due to lack of content. I feel confident if we put
the other two under load (which I am doing now) the same thing would