The activation of the IP Forwarding option is sometimes required in order to communicate with virtual machines installed on an Hyper-V server. Follow these steps to activate this option on your physical server :
1- Using Remote Desktop, connect to your server
2- Launch Powershell
3- Type the command
netsh
4- Enter "IPv4" in the context
interface ipv4
5- Then
show interfaces
This command will display the list of network cards , loopback cards and virtual switches configured on your server.
The first results column contains the indexes "Idx" of each of the network cards.
6- The next command will let you display the details for the network interface of your choice.
Replace <Idx> by the ID of the network card of your choice
show interface <Idx>

7- To activate the IP Forwarding option for the ID "Idx = 19" interface, execute:
set interface 19 forwarding="enabled"

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