@Mpuck 

Steps to Fix Printer Visibility on Apple Devices

1. Ensure Printer and Devices are on the Same Network:

   • Verify that both your printer and all Apple devices are connected to the same Deco network. Sometimes, mesh networks can create different subnets that may cause visibility issues.

2. Check for Network Isolation:

   • Some mesh systems have a feature called "AP Isolation" or "Client Isolation" which can prevent devices from communicating with each other. Ensure this feature is turned off in your Deco settings.

3. Enable Multicast and IGMP Snooping:

   • AirPrint and Bonjour rely on multicast traffic. Check your Deco settings to see if there are options to enable multicast and IGMP snooping, which helps with handling multicast traffic efficiently.

4. Reserve IP Address for Printer:

   • Since you’ve already reserved a fixed IP for your printer, ensure that it’s correctly assigned and active on your network.

5. Configure Firewall and Ports:

   • For the firewall rules, make sure you’re entering the correct internal IP for your printer. It’s the IP address reserved for your printer in the Deco settings. Here’s a step-by-step guide to add the rules:
     1. Open the Deco app.
     2. Go to More > Advanced > IPv4 Firewall.
     3. Add a new rule:
        • Protocol: UDP
        • External Port: 5353
        • Internal IP: [Printer's IP Address]
        • Internal Port: 5353
     4. Add another rule:
        • Protocol: UDP
        • External Port: 3702
        • Internal IP: [Printer's IP Address]
        • Internal Port: 3702

6. Restart Network and Printer:

   • After applying the settings, restart your Deco units, printer, and Apple devices to ensure all changes take effect.

7. Verify Printer Configuration:

   • On the printer, navigate to network settings and ensure that Bonjour/AirPrint is enabled. This option should be available under the network configuration on the printer's control panel.

8. Update Firmware:

   • Make sure both your Deco system and your printer are running the latest firmware. Firmware updates can resolve compatibility and connectivity issues.

Troubleshooting Tips

• Test with Ethernet: While you mentioned trying a direct Ethernet connection, do a fresh test ensuring the printer is directly connected to the main Deco unit. This can help rule out issues caused by the mesh satellites.
• Disable Unnecessary Deco Features: Features like parental controls or QoS might sometimes interfere with network traffic. Temporarily disable these to see if it resolves the issue.
• Use HP Smart App: Download the HP Smart app on your Apple devices. This app can sometimes detect and add printers that are not visible through standard AirPrint.

By following these steps, you should be able to restore visibility of your HP Officejet 8600 Pro Plus to your Apple devices and maintain peace in your household. If problems persist, consider reaching out to TP-Link (Deco) support for more detailed assistance, as they can provide guidance specific to their hardware and firmware versions.