I am using an NI PXIe-8861 controller with an MXI daisy-chain configuration connecting more than four NI PXI chassis. I observed that the PXIe-8861 is unable to boot, and it presents the following error:
This error occurs when the PXIe-8861 controller runs out of available PCIe resources required to successfully enumerate all connected PXI devices.
To resolve this issue, you can disable Thunderbolt support in the BIOS or adjust the number of reserved Bus to free up unused PCIe resources:
Completely disabling the Thunderbolt ports on the controller will render these ports unusable until Thunderbolt support is re-enabled in the BIOS. If your setup requires the use of Thunderbolt devices, you must limit the number of reserved PCIe buses, taking into account the PCIe bus requirements of all connected devices.
If the total number of required PCIe resources exceeds the limit of 256 defined by the PCIe standard, this solution will not be effective. In that scenario, you will need to consider partitioning the system into smaller configurations.
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