bits and multiple network cards

Question

Could it be that BITS is using the network setting with the lowest index instead of the one with the lowest metric to download the data?

following scenario

Windows 10 on a computer with 3 network cards

Network card 1 has DHCP settings whit default gateway, the other two are configured without a default gateway

The interfaces are specified as follows

IF-13 NIC1

IF-9 NIC2

IF-7 NIC3

BITS error message:

ErrorCode=0x80200010, ErrorText='BITS error: 'There are currently no active network connections. Background Intelligent Transfer Service (BITS) will try again when an adapter is connected.

Another computer with the same hardware configuration has the following settings:

IF-2 NIC1

IF-12 NIC2

IF-8 NIC3

Here BTS works without problems

Does anyone have an explanation for this?

Is it possible to change the order of the NICs?

Answer 1

Hi, @Piljer, Herbert

Thank you for posting in Microsoft Q&A forum.

BITS uses the IP Helper function, GetBestInterfaceEx, to determine the interface that has the best route to the specified IP address. BITS will then monitor bandwidth usage on that interface. Therefore, if the computer contains multiple network interfaces, BITS will use the interface that has the best route to the destination IP address. It is not based on the index or metric of the network interface. It is not possible to change the order of the NICs used by BITS.

For your reference:

https://learn.microsoft.com/en-us/windows/win32/bits/network-bandwidth

https://learn.microsoft.com/en-us/answers/questions/770620/sccm-bits-error-0x80200010-there-are-no-active-net

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Answer 2

I'm confused

if it is like that why BITS isn't using the route with the lowest cost?

everything except BITS is working well, we could access all the internal destinations and ping to the download source is also possible

From the device we have tested the network access to the destination trough PowerShell with the following command tnc -port 80 and 443 to the destination without any issue.

So why BITS is still in a opinion that there is no active network connection available

Is there any possibility to trace what BITS is doing to identify the right NIC?

Answer 3

Hi, @Piljer, Herbert

You may check below things:

Check if your network card 1 has a valid IP address and default gateway assigned by DHCP.

Check if your firewall or antivirus software is blocking BITS traffic or ports.

Check if your BITS service is running and configured correctly.