Thank you,
I tried these configurations on OpenWrt router (which is not EX5601 nor EX5401) and connected it directly to OdidO cable but did not work out. Internet only works if router is OdidO router with stock firmware.
So setup that works is as follows:
(INTERNET) <-----> [[ OdidO router with Original Firmware ]] ----- [[ OpenWrt ]] ------ [[ Home Network ]]
Just to clarify and share an update for others who might be planning to install OpenWrt on the EX5601 – especially those using it with an Odido connection:
In my case, the internet connection didn't work out of the box after flashing OpenWrt. but I imagine many users might keep it connected (at least initially), so I think it's useful to mention.
I do understand your point that the VLAN setup isn’t specific to the EX5601 itself, but I still believe it’s relevant to this thread. Someone browsing here might assume that OpenWrt will "just work" with their existing setup, so it's worth pointing out this potential issue.
Hopefully, this helps others avoid confusion or connectivity issues!