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Your linked solution only works with wireless clients on the same band. I have issues with an iPhone on the 5GHz band and an AirPlay playback unit on wired ethernet.
Link>Welcome!What Hardware version is your router? Look at sticker under the router case. DIR-860L Rev. A1Link>What Firmware version is currently loaded? Found on the routers web page under status. 1.02.What region are you located? EUInternet Service Provider and Modem ConfigurationsWhat ISP Service do you have? Cable or DSL?FibreWhat ISP Modem Mfr. and model # do you have?Zyxel p2812 plugged into a fibre<->ethernet converter box. The P2812 is configured purely as a modem, the router receives a true ip address and not a local one (i.e. 192.xx or 10.xx) Router and Wired ConfigurationsSome things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router. Besure to log into the Admin account on the router.Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting and maintain consistency for applications that need to connect as well as mapped drives.DoneEnsure devices are set to auto obtain an IP address.DoneIf IPv6 is an option on the router, select Local Connection Only under Setup/IPv6.Done, but why break IPV6?Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Enable or Disable SPI to test.Done. Any other setting breaks datagram broadcasting, regardless of whether SPI is enabled or not. Which is very weird.Enable uPnP and Multi-cast Streaming under Advanced/Networking. Done Disable uPnP for testing Port Forwarding rules. Enable IPv6 Multi-cast Streaming for routers that have a Media Server option. Disable IPv6 Multi-cast Streaming if IPv6 or Media Server is not being used.I've enabled multicast streams for both IPv4 and IPv6, however the required IPv4 addresses 224.0.0.251 and 239.255.255.250 never show up under "Status -> IPv4 Multicast addresses" Turn off WISH, and WPS under Advanced.No such optionsWAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port SpeedAuto-negotiaton is enabledSet current Time Zone, Date and Time. Use an NTP Server feature. The DST setting is only needed in the NA region. Tools/Time.DoneDisable WLAN partiton if it's enabled under Advanced/Adv Wireless... Disabled by defaultQuote from: jcberg on December 12, 2014, 12:16:54 PMYour linked solution only works with wireless clients on the same band. I have issues with an iPhone on the 5GHz band and an AirPlay playback unit on wired ethernet.