F
FraFra82
Hi,
I'm writing in the Windows 10 section, but I would need to know if the same behavior occurs in Windows 7 and 8.
I'm developing an application, with a network third part library, that use a network device plugged with an ethernet connection.
For some reasons, that I ignore, in my Network and Sharing Center the Ethernet connection sometimes get the name changed with a progressive number: the actual one it is named "Ethernet 30".
The application can't connect to the device unless I overwrite, in the code, the name of the last ethernet adapter.
Investigating, I noticed that the adapter name is obtained searching in the registry: the PnPIstanceId of the network device is searched between the locations HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\GUID_XXXXXX\Connection.
I noticed that in HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\ several GUIDs match the PnPIstanceId looked for, associated with obsolete network adapter names: i.e. "Ethernet 10", "Ethernet 20", etc.
Reading the Get-NetAdapter and Get-NetAdapterAdvancedProperty documentation I understood that the network adapter informations are stored in the location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\xxxxxxxx
In the location i.e 0012 I found that are present the following key,values pairs:
- DeviceInstanceID: the id of the my network device (same of PnPIstanceId above)
- NetCfgInstanceId: GUID_YYYYYY
In HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\GUID_YYYYYY\Connection the key Name has value of my current active network: "Ethernet 30".
So, looking for the NetCfgInstanceId, as above, can I always find the GUID (and so the name) of the current and active network?
Since I'm not able to delete and create a new network, I can't verify if the NetCfgInstanceId value is updated with the GUID of the new network adapter, it would seem so, but can you confirm it?
I queried the WMI, powershell and the registry and I didn't find any of obsolete networks between results, I only found them in HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\, can you confirm that they are harmless?
I can't find in the documentation any behavior differences with Windows 8 or 7, could be some differences that I ignore?
Thank you very much for the support.
Best regards.
Francesco
Continue reading...
I'm writing in the Windows 10 section, but I would need to know if the same behavior occurs in Windows 7 and 8.
I'm developing an application, with a network third part library, that use a network device plugged with an ethernet connection.
For some reasons, that I ignore, in my Network and Sharing Center the Ethernet connection sometimes get the name changed with a progressive number: the actual one it is named "Ethernet 30".
The application can't connect to the device unless I overwrite, in the code, the name of the last ethernet adapter.
Investigating, I noticed that the adapter name is obtained searching in the registry: the PnPIstanceId of the network device is searched between the locations HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\GUID_XXXXXX\Connection.
I noticed that in HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\ several GUIDs match the PnPIstanceId looked for, associated with obsolete network adapter names: i.e. "Ethernet 10", "Ethernet 20", etc.
Reading the Get-NetAdapter and Get-NetAdapterAdvancedProperty documentation I understood that the network adapter informations are stored in the location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\xxxxxxxx
In the location i.e 0012 I found that are present the following key,values pairs:
- DeviceInstanceID: the id of the my network device (same of PnPIstanceId above)
- NetCfgInstanceId: GUID_YYYYYY
In HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\GUID_YYYYYY\Connection the key Name has value of my current active network: "Ethernet 30".
So, looking for the NetCfgInstanceId, as above, can I always find the GUID (and so the name) of the current and active network?
Since I'm not able to delete and create a new network, I can't verify if the NetCfgInstanceId value is updated with the GUID of the new network adapter, it would seem so, but can you confirm it?
I queried the WMI, powershell and the registry and I didn't find any of obsolete networks between results, I only found them in HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\, can you confirm that they are harmless?
I can't find in the documentation any behavior differences with Windows 8 or 7, could be some differences that I ignore?
Thank you very much for the support.
Best regards.
Francesco
Continue reading...