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windows 2008 r2 hyper v virtual server lost network connectivity

system is a 2008 r2 sp1 server with 2 virtual servers. host runs fine. one virtual is the logon/active directory/dns server other is a virtual server running proprietary software that the users connect to and work on from workstations. that software has been acting up and running slow so their tech support recommended host server run windows update to install security and performance updates (had not been done in quite a while). even though program had been running perfectly fine on existing system but i agree updates are a necessary evil in our profession.

windows update would not run kept getting error to which kb947821 system update checker needed to be run. finished after quite a while and rebooted system. after this reboot my virtual AD server can not be connected to.

users can not ping it. host can not ping AD virtual server. the proprietary virtual server can not ping AD virtual server. users can ping host and can ping the virtual server with the proprietary software. host can ping virtual proprietary server as well.

from within the AD virtual server can not ping host nor other virtual server. no settings were changed, nothing showing in host event viewer other than there is no domain controller being it cant see it.

so weird that one virtual server completely lost connection and the other is perfectly fine. not sure where to go to get it back connected therefore the post here.

coonasty

ASKER

update to my current predicament, tried updating windows and no longer getting the error but it just runs forever "checking updates". so installed kb3102810 and rebooted.

now my AD server is working (network connectivity) and the proprietary server stopped with the exact same issue with no network connectivity.

trying to run update again and has been "checking for updates" for 30 min

coonasty

ASKER

found and installed a newer version of windows update software and at least was able to see updates and start downloading and installing. has been running a while. still only one virtual server with connectivity. not sure what will happen once reboot after updates finish

ASKER CERTIFIED SOLUTION

Greg Hejl

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coonasty

ASKER

thanks much for comment but it all the sudden just started working fine after a couple reboots. have rebooted a few more times and still working so i really dont have a true answer for this one