Aot4221sr Firmware Upgrade |link|: Full

That’s not in the manual , she thought.

A: Every 12–18 months or when release notes mention “full flash recommended.” For security patches, incremental updates suffice. aot4221sr firmware upgrade full

Do not skip this step. An incomplete “full” upgrade can occur if you try to downgrade or cross-grade incorrectly. That’s not in the manual , she thought