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Have AirPrint or HP made changes in the past month that cause print not to be recognized by AirPrint ??? I have used these printers (from my iPad Pro 10.5) for several months and now my iPad does not see either of my AirPrint (HP) printers.
As described, your LAN infrastructure may have stopped forwarding Apple Bonjour traffic on you local network - or your WiFi Router or Network Switch may be blocking this device discovery protocol.
The Apple Bonjour protocol uses mDNS (Multicast DNS) UDP port 5353.
You may find that restart of your network components will resolve the problem. You’ll need to restart your network devices in the correct order. Assuming that you WiFi Router provides DNS services for your network, restart devices in this order - allowing time for devices to fully boot/restart prior to restarting other devices:
As described, your LAN infrastructure may have stopped forwarding Apple Bonjour traffic on you local network - or your WiFi Router or Network Switch may be blocking this device discovery protocol.
The Apple Bonjour protocol uses mDNS (Multicast DNS) UDP port 5353.
You may find that restart of your network components will resolve the problem. You’ll need to restart your network devices in the correct order. Assuming that you WiFi Router provides DNS services for your network, restart devices in this order - allowing time for devices to fully boot/restart prior to restarting other devices:
Why would AirPrint suddenly stop working?
