Fritz!Box 4040 drops out internet connection if watching Youtube from LAN

[tomtom]

More details about the VLAN/switch issue with the FB4040 can be found here:

IPQ40xx Switch Config "Strangeness" (swconfig)

Hi... I'm one of the developers that managed to get support for the EA6350v3. Studying the OEM firmware, I managed to get a solution for reverting back to stock. And now I want to get involved into this. Again, by studying the OEM firmware I found this piece of text: # switch configuration # # Defines how the interfaces (switches) are configured. This information is # used by linkstate, linkmgr, and other processes to access the correct ports # for information, and in case of Broadcom, this i…

Optimized build for IPQ40xx devices

About this ROM This is a custom ROM for the EA6350 (the EA6350v3, to be more specific), EA8300, MR8300, and GL-S1300 [GL-B1300 needs feedback]. It fixes many problems present in the official OpenWrt build, allows users to revert to the original firmware [EA6350v3 only], and improves their wireless performance [EA6350v3 only]. Features: Fully preemptive, tickless kernel for improved latency. GNU bash as the default shell and nano with syntax highlights. Minimum clock frequency to 200 MHz with…

I'm running the FB4040 without having touched the VLAN/switch config and do not have such issues as you have described here. (on german cable 400 MBit)
Maybe a reset to (openwrt-)defaults and reconfiguring the FB4040 without touching the VLAN/switch via LuCI might help ?

Cheers,
Thomas