USB4 host router Thunderbolt 3 support validation
Verifies that USB4 host routers support backward compatibility with Thunderbolt® 3.
Description
USB4 host routers must support interoperability with Thunderbolt 3 (TBT3) peripherals according to chapter 13 of the USB4 Specification. Specifically, the USB4 host router must be interoperable with TBT3 device routers and cables. However, the host router is not required to be compatible with a TBT3 connection manager.
USB4 is an evolution of the TBT3 technology, using the same connector and filling many of the same high-performance requirements for users. As such, they will expect their existing TBT3 compatible peripherals to continue to function on their new USB4 enabled system. With the goal of maximizing compatibility with the existing TBT3 cable and peripheral ecosystem, all USB4 hosts must support interoperability with TBT3 device routers and cables.
Test details
| Specifications |
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| Platforms |
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| Supported Releases |
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| Expected run time (in minutes) | 5 |
| Category | Development and Integration |
| Timeout (in minutes) | 5 |
| Requires reboot | False |
| Requires special configuration | False |
| Type | development |
Additional documentation
Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):
More information
Parameters
| Parameter name | Parameter description | Default value | Required? | Settable? |
|---|---|---|---|---|
| WDKDeviceID | Device ID of the target host router device. If not set, tests are run against all host router devices on the system. | WDKDeviceID_NULL | False | False |
Enhancement scenarios
Support legacy Thunderbolt 3 peripherals on new USB4 capable systems.
Troubleshooting
For generic troubleshooting of HLK test failures, see Troubleshooting Windows HLK Test Failures.