This virtual network adapter was created on the Hyper-V host for use by the host operating system. I am showing you all of this because you can break network connectivity if you disable either of these network adapters or if you try to reconfigure the physical adapter that is bound to the Hyper-V virtual switch.
However, one thing to remember is that just because a virtual machine is not receiving an IP address from your DHCP server, it does not mean that the virtual machine is misconfigured.
In the first of those situations, there was a problem with the physical network cable on the host. For whatever reason, that particular cable just went bad. Obviously, the host was unable to communicate across the network, as were the virtual machines.
It just so happened that the problem was first noticed within a virtual machine, which made it seem as though it was the virtual machine that was having the problem when in reality, it was the host and everything on it.
In the other situation, the DHCP server responsible for provisioning virtual machines with their IP addresses had its IP address pool completely depleted. The easiest way to find out whether or not a Windows virtual machine has received an IP address is to open a command prompt window within the virtual machine and then enter the ipconfig command. This will show you the IP address that has been assigned.
You might start by pinging an IP address, but you can also test DNS resolution by attempting to ping a machine by its fully qualified domain name. Home » Articles » Troubleshooting Hyper-V communications problems. Brien Posey is a freelance technology author and speaker with over two decades of IT experience. To do this when creating the external switch, you must check the option box: Allow the operating system to share this network card, which will have the effect of creating a virtual network card for the Hyper-V host.
In order to illustrate the above explanations, I suggest you see several screenshots that I will explain to you. On the screenshot below, we can see that an external switch is configured, that it is attached to the physical card Realtek PCIe Gbe Family Controller and that the Allow the operating system to share this network card box is checked.
We are going to see the network connections on the Hyper-V host. On the screenshot below, we see the Realtek network card which is activated 1 as well as a virtual network card named vEthernet Virtual Switch External 2. The Hyper-V Sensor deployment includes a network-based intrusion detection system NIDS Network-based intrusion detection system NIDS monitors network traffic and events for suspicious or malicious activity using the sensors that provide management and network monitoring interfaces to networks and network devices.
A deployed Hyper-V Sensor supports a NIDS throughput of Mbps, but this performance may vary depending on your environment, configurations, and other variables.
If your organization uses multiple subnets to allow communication between headquarters and remote offices, you do not need a sensor for each subnet. However, you will need a Hyper-V Sensor for each physical location that you want to monitor.
Please let us know how we can provide you with better help. Product Requirements. Virtual machine requirements You must have an existing installation of Hyper-V on Windows Server or later capable of hosting the Command virtual appliance. Performance guidelines The performance of the ExtraHop Command appliance depends on the number of sensors you are deploying in combination with the number of devices you expect the system to discover in your environment.
Important: For deployments that include a Discover appliance that is connected to a Command appliance, we strongly recommend configuring a unique hostname. If the IP address on the sensor is changed, the Command appliance can re-establish connection easily to the sensor by hostname.
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