What is DFS and why did 5 GHz briefly disappear?
DFS channels share spectrum with radar. A router detecting radar must leave the channel, which can briefly interrupt or move compatible clients.
Channel/event time; radar detection; client DFS support.
Platform engineer for repeated DFS events.
Show the technical detail
On a managed Wi-Fi plan
eero selects channels automatically; use radio history and compatibility mode only if justified.
On another provider's router
Some routers allow non-DFS manual channels; follow provider guidance.
What to be careful of
This is a possible explanation, not proof without logs.
Where this comes from: Official · see the original source ↗ · Draft—technical review · checked 17 August 2026