Hmmm, I'm not entirely sure.
But i believe the firmware of your model had undergoing a change to the devices eth0 naming.
The port is renamed from eth0 to wan as DSA device.
You can verify if you click on the devices tab in your screenshot if you see a greyed non defined wan device 
If this is true you can adjust the device in the wan interface to use device wan instead of eth0.
Also to note:
Some isp have a cooldown if they detect precense of a other mac address, often it takes 1 hour so it works with the new mac address, changing back to the old mac address would reset the cooldown, so you may wait.
Hi bro thank u for u reply.I don’t know what exactly is the problem.I have sfp + port in device.I think sfp is not detecting in openwrt.I check ip link through ssh and not showing any internet link detected there.
Run logread -f over ssh, does it generate any output when you insert SFP module?
No while i look at logread -f.I did plug in and out.I saw in hack gpon sfp is not supported by this router in openwrt.But it is posted 2/3 years back.I have no idea what is the real cause
Might already ship with the image, but did you install kmod-sfp ?
Yes i did.Is there anything else i need to install
The commit message says that SFP port only works after exporting GPIOs 57 and 10. In particular, this passage:
Swapping the wan ethernet/sfp xor port
----------------
The way to swap the wan port between sfp and ethernet is the following:
export the pins 57 and 10.
Pin 57 is used to probe if an sfp is present.
If pin 57 value is 0 it means that an sfp is present into the cage (cat /sys/class/gpio/gpio468/value).
If pin 57 value is 1 it means that no sfp is inserted into the cage.
In conclusion by default both 57 an 10 pins are by default 1, which means that the active port is the ethernet one.
After inserting an SFP pin 57 will become 0 and you have to manually change the value of pin 10 to 0 too.
This is totally scriptable of course.
Thanks @andyboeh.I tried that .I’m spending hours to trying to fix this and changing everything.Nothing is working for me.
You may be on your own with this one, as I don't think anyone else here knows what you've tried. Unless there's someone with psychic powers here? Let's hope so. Crossing my fingers!
try asking in Adding OpenWrt support for Zyxel EX5601-T0.
if you do, ask mods to delete or lock this thread to avoid cross/double posting.
Hi @bmork,
I have a quick question regarding the SFP port on the Zyxel EX5601-T0 when running OpenWrt builds. Is SFP functionality currently supported, or is the issue I’m experiencing likely specific to my setup? I’m currently using Grain Fibre in the UK, in case that’s relevant.
Also, I wanted to say thank you for developing zyeng — it was the only tool that successfully helped me unlock the device. Really appreciate your work on that.
Thanks!