Contact US

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

strange DNS issue

strange DNS issue

strange DNS issue

I'm leaning towards DNS but to be honest im not really sure thats what it is. I have Hyper-V guest running on a DL380 gen 9 and it loses connectivity with the internet randomly. the only way to resolve the issue is to reboot the server. I;ve tried rebuilding the tcp stack i've tried to blow away the network adapter and rebuild it. This happen to be a machine that is on a different vlan then the rest of my servers so this particular server is honoring a vlan tag.

When this happens...

I can ping the domain controller (DNS server), google.com, default gateway open a web browser and try to serf the web and nothing. Monitroing software for that guest goes offline and my availability numbers are looking really crappy because of this guest.

RE: strange DNS issue


I found this error in the event log

The Event ID: 4231
A request to allocate an ephemeral port number from the global TCP port space has failed due to all such ports being in use.

and will be applying this hot fix


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close