Hyper V virtualized 2011 SBS cant connect to network

Posted on 2012-09-12
Last Modified: 2012-09-13
Client called this morning saying server was offline. Extended power outage last night caused it to shutdown. Upon repowering host server can connect and ping to default gateway and to Internet, but virtualized Windows 2011 SBS server running in Hyper V cannot. This previously worked

Host IP -

Guest IP -

Default GW -

I deleted and recreated the virtual network in Hyper V, but this hasnt resolved it. All settings look correct. The server says connected to local network, but not internet. Any thoughts on what I should be checking?
Question by:Eric_Price
    LVL 77

    Accepted Solution

    Make sure the SBS has not lost it's default gateway.  That was know to semi-often happen to SBS 2008 on reboot..  Perhaps run the SBS fix my network wizard in the console to confirm
    LVL 77

    Assisted Solution

    by:David Johnson, CD, MVP
    check that dns service is running.
    LVL 1

    Author Comment

    I appreciate you two weighing in on this. FWIW neither of these things were the issue, and at some level the problem remains. There is a delay of 10-15 minutes after the guest comes online where it can ping itself and the host, but nothing else on the subnet. After that time, it can ping and everything works correctly. There are no errors in the event log relevant to the issue. Its a bizarre one, and something Ill pursue with MS offline now that the customer is no longer in immiment threat of outage. Good luck in the community!
    LVL 77

    Expert Comment

    by:Rob Williams
    Thanks Eric.

    You might also look at the possibility of a bad switch port, or less likely a NIC driver.  The other thought is the switch port and NIC have to be set at the same speed and duplex, For example  both 100/full duplex, both auto-negotiate, etc.  In the case of an unmanaged switch you must use-auto negotiate on the NIC.  Otherwise they can get into a connection type battle which cases long network connection delays or disconnects.

    LVL 77

    Expert Comment

    by:Rob Williams
    PS- just remembered this is a VM, if the host has no problems connecting to other devices then that pretty much rules out my last suggestions.

    Featured Post

    Gigs: Get Your Project Delivered by an Expert

    Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

    Join & Write a Comment

    Suggested Solutions

    #Citrix #Citrix Netscaler #HTTP Compression #Load Balance
    When we have a dead host and we lose all connections to the ESXi, and we need to find a way to move all VMs from that dead ESXi host.
    How to install and configure Citrix XenApp 6.5 - Part 1. In this video tutorial we have explained step by step installation of Citrix XenApp 6.5 Server on Windows Server 2008 R2 is explained in this video. We have explained the difference between…
    In this video tutorial I show you the main steps to install and configure  a VMware ESXi6.0 server. The video has my comments as text on the screen and you can pause anytime when needed. Hope this will be helpful. Verify that your hardware and BIO…

    745 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    16 Experts available now in Live!

    Get 1:1 Help Now