Announcement

Collapse
No announcement yet.

No connectivity to virtual machines

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • No connectivity to virtual machines

    Hello,

    I need some help.

    Problem: No connectivity to virtual machines.

    System: Dell T610 server, Windows Server 2008 Ent r2 SP1, Hyper-V, 3 physical NICs

    Virtual Machines: one is Ubuntu, second Windows Server

    Virtual Network: 2 External Networks bound to separate NICs showing as virtual switches, box is checked for allow managing operating system to share network adapter

    MAC addresses of physical NICs are reserved and marked as Manual DHCP in IPAM.
    TCP/IP properties are set to Obtain automatically because the switches assign by MAC not IP. There are reserved IP addresses assigned to each MAC.

    All devices connecting to the virtual machines have reserved IP and MAC.

    Two separate network zones for each NIC.

    I have rebooted the server, made sure all services are running and Windows security settings allow connectivity. When I try to ping the IP of the virtual machines, no result. Cannot bring up IPs of virtual machines in browser. NICs are saying they are connected and are sending and receiving packets.

    Lastly, the virtual machines have nComputing virtual desktops connecting to them. I use nComputing Management Console to manage them remotely.

    Windows Remote Licensing Services is installed and operational.

    So what am I missing here ? Thanks in advance for any assistance !

  • #2
    Re: No connectivity to virtual machines

    any VLAN configured on your network environment?
    are you getting DHCP address from DHCP server?
    can you ping from VM to VM?
    make sure the MAC is unique in your environment
    firewall turned off?

    Comment


    • #3
      Re: No connectivity to virtual machines

      any VLAN configured on your network environment? No.
      are you getting DHCP address from DHCP server? Yes on devices.
      can you ping from VM to VM? No separate network zones.
      make sure the MAC is unique in your environment. Yes.
      firewall turned off? No but I have exceptions for connections to go through.

      Thanks for the reply.

      Comment


      • #4
        Re: No connectivity to virtual machines

        turn off firewall on Hyper -V host and guest..
        instead of ping, can u try other protocol, like telnet, RDP, HTTP...

        Comment


        • #5
          Re: No connectivity to virtual machines

          As it ever worked or is this being setup for the first time? Can you connect to the Hyper-V Hosts via the Management Console remotely? Does your Dell server have a DRAC? Is that connected to the physical switch and can you connect to it? Have you plugged other devices into the Physical switch to see if you have connectivity externally and with the Hyper-V Hosts/Guest VMs?

          Comment


          • #6
            Re: No connectivity to virtual machines

            After more troubleshooting, I found that the VMbus adapter was not installed on the virtual machine.
            So I re-installed Intergrated Services disk and
            ran this: set devmgr_show_nonpresent_devices=1
            start devmgmt.msc and went to View Show Hidden Files and the network adapter on the virtual machine is still not there. In fact the Network Local Area Connections window is completely blank. I even re-installed the virtual network and made sure the drivers on the Host are updated. Host is showing connectivity. I was also reading a thread that DetectHal should be checked but I could not get to show up on the virtual machine boot.ini. That is the status. I am still not functioning and under deadline.

            Any more suggestions are greatly appreciated !

            Comment


            • #7
              Re: No connectivity to virtual machines

              Have you also tried the emulated network adapter for the vm config.
              gerth

              MCITP sa, ea & va, [email protected]

              Comment


              • #8
                Re: No connectivity to virtual machines

                As suggested, try the emulated NIC though that would have been the original NIC added. I take it that you are have connected the NIC to a Virtual Network of External type? Have you now tried with a new VM?

                Comment


                • #9
                  Re: No connectivity to virtual machines

                  This is resolved. Ran the devcon.exe and removed the phantom adapter.

                  Thank you again for all the responses !

                  Comment


                  • #10
                    Re: No connectivity to virtual machines

                    Glad to hear it and thanks for posting back with the fix.

                    Comment

                    Working...
                    X