What is the difference between adding nic interface during or after adding Hyper-v to Windows 2019

Question

Good Evening Team,

To Start with I am a Novice, answer as simple as you like I will not take offence :)

Windows 2019 PC with only 1 Nic Interface

Before I install Hyper-V I could talk to the Internet.

Right if I install Hyper-v on Windows 2019 with out a Nic Interface, I can talk to the Internet.

But if I install Hyper-v on Windows 2019 with a Nic Interface, then I cant talk to the Internet.

And I noticed that in the network settings for Nic Interface, that the gateway was removed and IPV4 was unticked...

Why Please...

All the best from Alan

Answer 1

When you create a new external vSwitch the internet protocols are removed from the adapter and the Hyper-V Extensible Switch protocol is added turning that physical port into a multi-port virtual switch. Connect your VMs to this vSwitch and use each VM's vEthernet to configure the addressing in the exact same manner as if it were a physical NIC

https://blogs.technet.microsoft.com/jhoward/2008/06/17/hyper-v-what-are-the-uses-for-different-types-of-virtual-networks/

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 2

Thank you for your answer BUT I am trying to get my head around the face there are two ways to add an Interface, during the install of Hyper-V, or after you have installed Hyper-V buy adding a Vitual switch

WHY is there two methods is one right or wrong, or do they have different functions.

Answer 3

An external virtual switch allows your virtual machines to connect to an external network. You can also allow the management operating system to share the same selected network adapter. When you do this then a new virtual vEthernet adapter is added to the host.

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 4

Thank you, If you have only one Nic, and you use that during the install of hyper-V, your machine does not have access to the internet to do updates, so are you saying that is the wrong method.