If you want, I can produce step‑by‑step checklist text you can print for an on‑site update.
NetScout has officially moved support to the LinkRunner 10G series. However, the LinkRunner AT 2000 is still actively supported with critical security and protocol updates until at least 2026. linkrunner at 2000 firmware update
Do not confuse the "2000" with the old "AT 1000." The 1000 is EOL and receives no updates. If you want, I can produce step‑by‑step checklist
The firmware is bundled with the LinkRunner Desktop Software. You do not usually need to download a separate firmware file. NetScout has officially moved support to the LinkRunner