MT7621 LAN port link down bugs

For Developers
1

mtk_soc_eth 1e100000.ethernet eth0: port 3 link down
mtk_soc_eth 1e100000.ethernet eth0: port 3 link up

When two routers are connected via LAN to LAN, one acts as an wireless AP
both are OpenWrt based System.
LAN ports will randomly disconnect about twice a day,
reconnect automatically after 3 seconds
The openwrt kernel log found random but not frequent ports link down and link up.

2

same issues from

3

My newifi-d2 has the same problem, but only appears on the port connected to the 100m device (IPTV box), and it is frequently down / up when transmitting UDP packets.

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