Running Hyper-v standalone 2008R2 with latest updates. VM with 2 gig memory, 2 nics(not emulated), 30 gig hard drive space(not dynamic). I have no issues with lastest stable 8.1 release with the same settings except for nics are emulated.
After 2-3 hours, I lose LAN connectivity, I am unable to login to web interface or to ping astaro. Logging into the the console I can ping any internet site from the WAN side. I can ping the loopback, but nothing on the LAN. taking down eth0 and bringing back up with ifconfig seems to fix the issue temporarily.
Update: after bringing eth0 back up, logging into the webamin causes the LAN to drop immediately.
MuVy