NIC traffic not passing through from host to guest

Discussion in 'Virtual PC' started by MollyK, Jan 20, 2005.

  1. MollyK

    MollyK Guest

    we are running an application on virtual pc that requires us to monitor
    traffic on one of the nics on the host machine. I have verified that we are
    using the correct nic, but I do not see all the traffic on the guest nic as
    on the host.
    so basically this is the setup:
    we are using 2 nics from the host, one with the IP (that is set on the
    virtual pc with a different IP) and the other with the traffic we want to
    MollyK, Jan 20, 2005
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  2. MollyK

    MollyK Guest

    sorry... some additional information I forgot to mention. both host and guest
    are XP Professional
    thank you.
    MollyK, Jan 20, 2005
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  3. Hi MollyK,

    If by 'monitor' you mean that the card needs to go into promiscuous mode
    and see all the packets going by - then this will not work inside of the
    virtual machine in the way that you want to. From a topological point
    of view the virtual machine is connected to a virtual switch - which is
    bridged to the host network card. Putting the virtual network card into
    promiscuous mode will not allow you to see arbitrary traffic on the
    other side of the bridge.
    Benjamin Armstrong
    Virtual machine Program Manager

    This posting is provided "AS IS" with no warranties, and confers no rights.
    You assume all risk for your use.
    Ben Armstrong [MSFT], Jan 23, 2005
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