Queuing issue after snapshot update (ipq40xx + ath79)

Just a wild guess. So caution!

I came across this thread: IPQ40xx Switch Config "Strangeness" (swconfig) recently.

Because my first unfounded thought/impression was, as I saw those pings, something is looping within your network. And I wonder if this could be related to the VLAN quirks. There is still WIP about this VLAN issues.

Out of own experience. If you set this value explicit within your configuration this can cause wired issues with different devices. So better do not mess with this value.