Archer C60 v2 interface "ethernet switch"

Installing and Using OpenWrt
1

Hello

I've installed OpenWRT 19.07.3 (OpenWrt 19.07.3 r11063-85e04e9f46 / LuCI openwrt-19.07 branch git-20.216.62629-4d5c88b) yesterday and now I'm trying to understand what does interface 'ethernet switch' mean.

Total list of interfaces:

br-lan
eth0
eth0.1
eth1
lo
wlan0
wlan1

image

Looks like it's enough to use (add it to LAN) "Switch VLAN (eth0.1)" to have network connection and other stuff.

So, why should I use and configure "Ethernet Switch (eth0)"? What is it and how can I use it? For why? Should I add this interface to any firewall zone (like LAN or WAN)?

Can you please help me to understand the meaning of this interface? I had tried to configure it but saw no difference at all.

Thank you.

p.s. I understand the meaning of a switch in context of networks. I just would like to understand what is influenced by config of this interface. I saw no changes after changing its configuration. thats all

2

Best is to leave eth0 alone. It basically is a VLAN trunk between the onboard switch IC and the CPU of your SoC.

If you'd untag your CPU port in the switch VLAN 1 config, your LAN packets would appear on eth0 instead of eth0.1. If no switch VLAN includes the CPU port in untagged stage, no traffic will arrive on eth0.