Case studies · Network Infrastructure
Financial Services
devices upgraded on site — 2 gateways + 9 APs
APs per batch — coverage never fully down
The estate is managed locally — the gateways are the controller, with no cloud management plane — so the upgrade could only be done on site, by a human, in an agreed window; if a gateway or AP came back wrong from a firmware step, there was no remote rescue. And the wireless carried the whole office. The version choice mattered more than picking the newest: 10.7.2.4 was selected over the newer 10.8.x branch as the more mature, field-validated release, specifically because it carries the fixes this hardware needs — known AP-515 5 GHz client disassociation behaviour and gateway stability issues — along with current security patches.
Everything was backed up before anything was touched: full configuration exports of both 9004 gateways through the local controller, plus AP configurations and group policies, so any failed step had a fast, exact rollback path.
The gateways went first — one at a time, each allowed to reboot and stabilise before the next, with management access, tunnel status, and user connectivity verified at every step before the estate moved forward.
The nine access points upgraded in controlled batches of three, never all at once: after each batch, AP re-association and SSID operation were confirmed before the next batch started, so the office never lost wireless coverage entirely at any point in the window.
The work ran in non-office hours — after 18:00, as agreed — with the client notified to warn internal users ahead of the window, and completed in a single visit.
The estate runs at AOS-10.7.2.4 across both gateways and all nine APs — current security patches in place, the known 5 GHz client-disassociation behaviour addressed at firmware level, and full wired/wireless functionality verified, with every AP online and managed in the local controller, before sign-off.
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