Please help me with one minor issue regarding network configuration

[Antonio Apostoliu]

Hello

I see this page

https://github.com/xhjcehust/qemu-virtnet-loopback

You are so kind to tell me the network arguments part for connecting on Windows host (with configurated loopback interface named retealoopback)

I tried:

-netdev tap,id=mynet1,ifname=retealoopback -device virtio-net-pci,netdev=mynet1

as second network adapter 

Qemu output was:

tap: Could not open 'retealoopback'  - on standard output stream

and 

C:\Program Files\qemu\qemu-system-x86_64.exe: -netdev tap,id=mynet1,ifname=retealoopback: Device 'tap' could not be initialized - on Debug(error) output stream

Context was:

C:\Users\antonio.apostoliu>ipconfig
....
Ethernet adapter retealoopback:

   Connection-specific DNS Suffix  . :
   IPv4 Address. . . . . . . . . . . : 192.168.209.1
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :
.....
C:\Users\antonio.apostoliu>

I used:

https://qemu.weilnetz.de/w64/2023/qemu-w64-setup-20230802.exe

The loopback interface was configurated with next powershell script

Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
$NIC_NAME = "retealoopback"
$IpAddress='192.168.209.1'
$PrefixLength=24
[string] $strFilenameTranscript = "retealoopback.log"
Start-Transcript -path $strFilenameTranscript | Out-Null
 .\devcon.exe -r install $env:windir\Inf\Netloop.inf *MSLOOP | Out-Null
$eth_loopback = Get-NetAdapter|where{$_.DriverDescription -eq "Microsoft KM-TEST Loopback Adapter"}
Rename-NetAdapter -Name $eth_loopback.name -NewName $NIC_NAME
if ($IpAddress){
    New-NetIPAddress -InterfaceAlias $NIC_NAME -IPAddress $IpAddress -PrefixLength $PrefixLength -AddressFamily ipv4
}
Set-NetIPInterface -InterfaceIndex $eth_loopback.ifIndex -InterfaceMetric "254" -WeakHostReceive Enabled -WeakHostSend Enabled
Disable-NetAdapterBinding -Name $NIC_NAME -ComponentID ms_msclient
Disable-NetAdapterBinding -Name $NIC_NAME -ComponentID ms_pacer
Disable-NetAdapterBinding -Name $NIC_NAME -ComponentID ms_server
Disable-NetAdapterBinding -Name $NIC_NAME -ComponentID ms_tcpip6
Disable-NetAdapterBinding -Name $NIC_NAME -ComponentID ms_lltdio
Disable-NetAdapterBinding -Name $NIC_NAME -ComponentID ms_rspndr
Stop-Transcript

Best regards

P.S  With https://build.openvpn.net/downloads/releases/tap-windows-9.21.2.zip works