Follow these steps to update your ASR 9xx USB console drivers: 1. Download the Driver ( .zip )
The Cisco ASR 9000 USB console port uses a USB Type-Mini-B connector, which acts as a serial terminal. When you connect this to a Windows PC, it requires a specialized driver to emulate a COM port.
That final syslog message confirms the worked correctly.
Direct serial-to-USB communication is impossible, preventing initial configuration or troubleshooting during boot failures. Where to Download the Drivers asr9xxusbconsoledriverszip upd
If no output appears, verify that another application is not locking the virtual COM port.
Administrators frequently encounter "driver not found" or "connection refused" errors when the wrong port or cable is used. Cable Types
Check the box for "Delete the driver software for this device." 3. Run the Installer Follow these steps to update your ASR 9xx
: The driver mimics an older serial platform, mapping the USB connection directly into a Virtual COM Port (VCP).
Unzip your archive package ( asr9xxusbconsoledriverszip ) to an easily accessible folder, then choose the appropriate procedure below for your specific operating system. For Microsoft Windows (10 / 11 / Server)
To make this modern USB interface work, your laptop or operating system requires a specific USB-to-UART bridge emulation driver. In the Cisco deployment ecosystem, this package is frequently searched for under the archive name . This guide covers the installation, updating ( upd ), and troubleshooting of these essential console drivers. 1. Why Do You Need the ASR 9xx USB Driver? That final syslog message confirms the worked correctly
Complete the installation wizard and restart your computer if prompted.
If you can tell me or what specific error message you're seeing , I can offer more tailored troubleshooting steps. Alternatively, ASR920 and USB Console - Cisco Community
Windows should now detect the new hardware and automatically finalize the installation. A final confirmation message like "XR21V1401 USB UART Device driver successfully installed" will confirm success, and the USB console will be ready for use. You will now see a new COM port in your Windows Device Manager under "Ports (COM & LPT)", typically named "XR21V141x USB UART (COMx)".
| Failure Scenario | Root Cause | How asr9xxusbconsoledriverszip upd Resolves | | :--- | :--- | :--- | | | Driver signing expiration (old SHA-1 certs). | upd includes SHA-256 signed drivers. | | Linux: "ftdi_sio: Unknown symbol" | Kernel module conflict. | upd script blacklists conflicting modules. | | macOS: "System Extension Blocked" | Legacy kext not approved. | upd uses Apple-approved DEXT framework. | | Intermittent disconnects during reload | Buffer overflow in old driver. | upd increases internal FIFO buffer from 256B to 4KB. |
On some ASR9k RPs, the USB console is disabled by default in IOS XR. If nothing appears, check: