The "ME" (Mobility Express) designation indicates that this firmware allows the access point to function as a virtual wireless LAN controller. This eliminates the need for a physical controller in smaller deployments of up to 100 access points. High-quality firmware ensures: Cisco Mobility Express for Aironet Access Points
If you have a file named exactly airap2800k9me851820tar (or with slight variations) and you did not get it from Cisco.com:
: Improves downlink performance for all mobile devices, including older 802.11a/g/n clients, while extending battery life on those devices. Smart Beaconing
If your 2800 APs have felt a bit flaky on newer firmware, roll back to this build. If you’re setting up a new site on a budget, hunt down some used 2800s and flash them with this image. You will get enterprise-grade 4x4:4 MU-MIMO and a rock-solid controller for pennies on the dollar.
The "ME" (Mobility Express) designation indicates that this firmware allows the access point to function as a virtual wireless LAN controller. This eliminates the need for a physical controller in smaller deployments of up to 100 access points. High-quality firmware ensures: Cisco Mobility Express for Aironet Access Points
If you have a file named exactly airap2800k9me851820tar (or with slight variations) and you did not get it from Cisco.com:
: Improves downlink performance for all mobile devices, including older 802.11a/g/n clients, while extending battery life on those devices. Smart Beaconing
If your 2800 APs have felt a bit flaky on newer firmware, roll back to this build. If you’re setting up a new site on a budget, hunt down some used 2800s and flash them with this image. You will get enterprise-grade 4x4:4 MU-MIMO and a rock-solid controller for pennies on the dollar.