NETGEAR Orbi 850 Series mesh guest network cannot reach devices, cast or print

The checks in more detail

Two options matter for safety: Allow guests to see each other and Allow guests to access my local network should both be off. A common complaint is a guest network that disappears after a firmware update, and NETGEAR published an advisory about an auto-update problem on the 750, 840 and 850 series, so update manually and check afterwards. If the guest network does not appear, restart the router and satellites and check the firmware. In access point mode, guests are handled by the upstream router. Guests that cannot reach a printer or a TV are working as intended.

A schedule can limit when the guest network is on, and a timeout can switch it off after hours. You can give each guest band a different name to see which band a visitor uses, and a guest network on a timer prevents leaving it on after visitors go. A simple habit is to change the guest password after each stay, which takes a minute in the app and stops old guests from reconnecting.

Remember that the Orbi's guest network inherits the router's internet connection, so a guest streaming a big video can slow your own browsing, and a guest bandwidth limit, if your firmware offers it, keeps things fair. Check the Guest Network page for such a limit, and the router's QoS settings. Remember that guests who stay for a long time may want access to a printer or media server, and the guest network blocks them by design; for trusted long-stay visitors, sharing the main password is a decision to make with care. A separate IoT network is another use of the guest network, keeping smart plugs apart from computers.