[FS#762] TP-Link WR1043ND v4: Network on switch fails at random

[LEDE Bugs]

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FS#762 - TP-Link WR1043ND v4: Network on switch fails at random
User who did this - Sven (Sven)

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I use the TL-WR841N as an access point, so it neither offers DHCP nor uses iptables (I disabled both). When my Icinga informs me that the access point is down, I cannot ping or ssh it from the LAN side. But I still can connect to it from the WLAN side, setting a static IP address on my notebook.

"brctl show" looks normal, "dmesg" doesn't show any recent log entries. But any traffic that should go through the LAN ports simply does not pass. The "link" LED on the switch the TL-WR841N is connected is still on.

Unfortunately (or fortunately) the problem did non occur for the last 5 weeks, so I cannot provide "swconfig" output as requested. But I will provide it as soon as the problem occurs again.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=762#comment3241