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Hyper V VM NIC stopped working correctly.

Posted on 2010-09-09
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Last Modified: 2013-11-06
I setup a Windows 2008 Hyper V Server with only one of the two ethernet NICs connected  and setup a few test VMs. I added memory to the server and accidently plugged in the wrong ethernet port that was default DCHP without knowing. I started the Windows 2008 Sever VM and logged in and notice the NIC lost it's static IP and now DHCP , setup static address and  was ask to delte the old NIC config, and I just clcik OK and proceeded, then notice IP config did a gateway address when it was configured in the IP V4 TCP properties. I checked the Hyper V server virtual NIC and saw I need to move the cable to the Hyper V server NIC with Static IP, but the Windows 2008 Hyper V VM NIC seems to work but I still cannot get the internet browser to work and IPCONFIG still has no gateway address. Any suggestions?
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Question by:355LT1
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Expert Comment

by:feliciogs
ID: 33642818
Could you send a "netsh interface ip show config" of Hyper-V Host and of VM as a list of virtual switches (network configuration on Hyper-V Manager) ?
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Author Comment

by:355LT1
ID: 33643288
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\administrator.Austin>ipconfig

Windows IP Configuration


Ethernet adapter Local Area Connection 4:

   Connection-specific DNS Suffix  . :
   IPv4 Address. . . . . . . . . . . : 207.91.182.5
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 207.91.182.1

Tunnel adapter isatap.{A9468193-D535-4943-BDCD-54D3EEC0714D}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :

Tunnel adapter 6TO4 Adapter:

   Connection-specific DNS Suffix  . :
   IPv6 Address. . . . . . . . . . . : 2002:cf5b:b605::cf5b:b605
   Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :

C:\Users\administrator.Austin>netsh interface ip show config

Configuration for interface "Local Area Connection 4"
    DHCP enabled:                         No
    IP Address:                           207.91.182.5
    Subnet Prefix:                        207.91.182.0/24 (mask 255.255.255.0)
    Default Gateway:                      207.91.182.1
    Gateway Metric:                       256
    InterfaceMetric:                      5
    Statically Configured DNS Servers:    207.91.182.12
    Register with which suffix:           Primary only
    Statically Configured WINS Servers:   207.91.182.12

Configuration for interface "Loopback Pseudo-Interface 1"
    DHCP enabled:                         No
    IP Address:                           127.0.0.1
    Subnet Prefix:                        127.0.0.0/8 (mask 255.0.0.0)
    InterfaceMetric:                      50
    Statically Configured DNS Servers:    None
    Register with which suffix:           None
    Statically Configured WINS Servers:   None


C:\Users\administrator.HOUSTON>














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Author Comment

by:355LT1
ID: 33645406
I noticed when I click details on the LAN connection on the VM with the connection problem I see TCP autoconfiguration is enabled with a different IP address than the statice IP I entered.
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Expert Comment

by:Greg Hejl
ID: 33653120
the ipconfig is from the host and the VM?

they both have the same network address.

change the VM IP
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Author Comment

by:355LT1
ID: 33655171
The VM IP is 207.91.182.14
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Accepted Solution

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Greg Hejl earned 500 total points
ID: 33655390
http://social.technet.microsoft.com/wiki/contents/articles/hyper-v-virtual-networking-best-practices.aspx

you may have to tear down your virtual iinterfaces on the host and rebuild them.
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