The ASR 9000 series uses a console port (depending on the line card or RSP). This port typically requires a USB-to-serial adapter driver because the router’s console is still serial internally.
If the port does not appear in Device Manager, ensure you are not using a "power-only" USB charging cable. The cable must support data transfer to facilitate the serial bridge. ASR920 and USB Console - Cisco Community asr9xxusbconsoledriverszip hot
If you are experiencing a hot (urgent) problem getting the console to work, here is a quick checklist: The ASR 9000 series uses a console port
stared at his terminal, the cursor blinking like a taunting heartbeat. The core router—an ASR 900—had gone dark. No remote access, no heartbeat, just a stubborn amber light glowing on the faceplate. asr9xxusbconsoledriverszip hot