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Windows XP, Vista, 7, 8, and 10 (32-bit and 64-bit).
If you do not see a prompt after installing the contents of asr9xxusbconsoledrivers.zip , walk through these engineering troubleshooting vectors:
Most USB console ports on networking gear use a USB-to-UART bridge chip. On Cisco ASR 9000 routers, this chip is typically from or Silicon Labs . While some operating systems have built-in drivers for these chips, the specific implementation on ASR9k hardware—especially older IOS XR versions—requires a certified driver version to avoid disconnects, data corruption, or kernel panics.
Once connected, press a few times. You should see the router prompt (e.g., RP/0/RP0/CPU0:ASR9000# ). If not, verify power and cable integrity. asr9xxusbconsoledriverszip
Plug the USB cable into the PC and the ASR 9xx mini-USB port.
The zip file typically contains xrusbser_ver2100_installer.exe (or similar versions like 3.1).
asr9xx_usb_console_drivers/ ├── Windows/ │ ├── FTDI_CDM_v2.12.28.exe │ ├── SiliconLabs_CP210x_v6.7.exe │ └── asr9k_usb_console_inf/ ├── Linux/ │ ├── ftdi_sio.conf │ └── README_Linux.txt ├── macOS/ │ ├── FTDIUSBSerialDriver_v2.4.2.pkg │ └── SiLabsUSBDriver.dmg ├── Firmware/ │ └── usb_console_fw_upgrade.bin └── README_asr9xx_console.txt Windows XP, Vista, 7, 8, and 10 (32-bit and 64-bit)
screen /dev/cu.usbmodem[your‑port‑number] 9600
Use the terminal command ls /dev/tty.* to find the device path for your serial software. Common Troubleshooting Tips
The specific COM port identified in your Device Manager (e.g., COM3, COM4) Speed (Baud rate): 9600 Data bits: 8 Stop bits: 1 Parity: None Flow control: None Troubleshooting Common Issues While some operating systems have built-in drivers for
Once you download and extract asr9xxusbconsoledriverszip , you will typically find the following structure:
Once these settings are configured, open the serial connection. You should see the router’s console output. Press to bring up the login prompt. If the system does not respond immediately, wait a moment — the router may still be in its boot process, especially if this is the first power‑on.
Windows tends to assign the same COM port number to the same physical USB port on your PC. By always using the same USB port on your laptop, you will become accustomed to a fixed COM number (e.g., COM11), which reduces the risk of connecting to the wrong device.
If you need to remove the driver — for example, to perform a clean reinstallation after a failed setup — you can uninstall it through Windows.