Peer-to-Peer AP Firmware Upgrade
You can use the peer-to-peer upgrade option if you need to upgrade many APs of the same
model at a time. This option allows firmware image downloads directly from peer APs, instead
of relying on a cloud download for every AP.
Mist randomly selects an AP as the seed AP, which downloads the firmware files from the cloud. The remaining APs then download the firmware files from the seed AP locally. You can upgrade a maximum of 10 APs using one seed AP. By limiting the cloud download to just one AP, you can decrease the time needed for upgrading multiple APs.
Note:
You can use the peer-to-peer upgrade option only if you manually upgrade the firmware.
To upgrade the firmware using peer to peer upgrades:
All the APs, except for the seed AP, reboot once the firmware upgrade is complete. The
seed AP reboots only after all the other APs have rebooted.