What issue occurs when provisioning an ISR 4000 by PnP using only its UDI while the device has two serial identifiers (UDI and SUDI)?

When provisioning an ISR 4000 via Plug and Play (PnP) using only its Unique Device Identifier (UDI) while the device also possesses a Secure Unique Device Identifier (SUDI), the PnP process can encounter redirection problems. This is because the PnP server might expect or prefer the SUDI for secure identification and redirection to the correct controller or configuration. If only the UDI is presented, the server may fail to properly authenticate the device or redirect it to the intended vManage controller, leading to a stalled or failed provisioning. The other options (interface buffer overflow, memory overload, spanning tree issues) are general network or device performance problems not directly caused by this specific PnP identification mismatch.