This is a slightly difficult problem to explain without same basic background information - I'll try and refine the question later as necessary
Originally, I have a single hosted server (Win 2008R2) with the following range of 8 IP addresses.
- Single NIC ( IP: x.x.128.72 -> x.x.128.79 // Subnet: x.x.255.192 // GW: x.x.128.65 )
After installing Hyper-V and setting up a single virtual server on the same box, I then wanted to assign one of the IP addresses to the virtual server, leaving everything else running normally.
--
Firstly, I tried using the "External" network, but (even after setting IPs on the "Virtual Adapter" similar to Here but struggled to get networking running at all).
I needed to keep the server running (otherwise I would have spent more time pursuing this approach)
Q1 ... Was this a sensible thing to do ? Should I have carried on down this route ?
--
I then decided to try different approach - Set the HyperV network to "Internal" (visible to Management OS)
- Physical NIC ( IP: x.x.128.72 to .75 // Subnet: x.x.255.192 // GW: x.x.128.65 )
- Virtual NIC ( IP: x.x.128.78 // Subnet: x.x.255.252 // GW: x.x.128.72 )
- Gateway was the same as the IP of the physical NIC )
- Virtual OS-NIC ( IP: x.x.128.77 // Subnet: x.x.255.252 // GW: x.x.128.78 )
- Gateway was the same as the IP of the host virtual-NIC )
--
Surprisingly enough, this approach actually worked, and I was able to connect from all the following: - Internet to/from physical NIC (x.x.128.72) - physical NIC (x.x.128.72) to virtual-OS-NIC (x.x.128.77) e.g. testing via ping + FTP - Internet to/from virtual-OS-NIC (x.x.128.72)
--
The problem I have is that this approach seems to only last for a short while (a few hours).
After this time, it seems that I lose the ability to connect from Virtual-OS-NIC to/from the internet (but I can still connect from the host-OS to the virtual-OS and from the host-OS to the internet)
I have re-tested this a couple of times with the same results ... I leave the server on for a few hours (e.g. overnight), and when I come back in the morning, the Virtual-OS loses the ability to route to the internet
--
I'm not quite sure what to look at next (or whether I'm going about this completely the wrong way )
One "possible relevant item" is that the host-OS is also running RRAS (Routing and Remote Access), but this is only to run a simple VPN
--
Q2 - Wheat should I be looking at next ? (Any good references / recommendations of what to try)
Would appreciate any thoughts or comments (even if you tell me I'm going about this the wrong way)
--
*EDIT - Second attempt at using "External" *
Having re-tried with the "External" approach, I again got NO network access...
I then unchecked the "Enable Virtual LAN Identification for Management operating System" ... Hey presto, everything sprung into life.
The criticual wording was hidden in the "more about managing virtual networks" link that states
Specifies an identification number that can be used to isolate network traffic from the management operating system
Eventual result ... SUCCESS (but without reslution of why it PARTLY worked for limited time)
I later found the following MSDN Blog-Post interesting ... Understanding Hyper-V VLANs
