2degrees to Edgerouter 4 eth0 no link light

Hi There,

I have been trying to resolve this and now I am stuck.

Can you please review the information below and offer a second opinion if I am correct.

ONT(100Mb/s and 20Mb/s with 2 degrees) ----- new 3 meter CAT 6 ---- new EdgeRouter 4 with firmware 2.0.0 --- eth0 (WAN) has no link.

ER4 eth0 does not get a green light.

I tried to set 100Mb/s full duplex and Auto Negotiation as well, and I just can not get the ONT to talk to the ER4 on eth0.

Reset the fimrware, read the article here

https://www.geekzone.co.nz/forums.asp?forumid=66&topicid=205740

read ubnt.com forums, I am out of ideas now.

I suspect the ISP end of the ethernet port need to be set to Auto negotiation for me to have a link on the ER4 eth0 !?

Interestingly if I plug my ER4 eth0 ------ into any other device eth0 at home (iMac eth port or even the FritzBox eth0 port) then the ER4 eth0 link light comes on and I have a 1GB FD connection between them.

show interfaces ethernet physical (shows me)

WAN eth0 has Auto negotiation ON 100Mb/s and Full Duplex with NO link detected.

LAN eth1 is fine 1000Mb/s FD with link

I have tried three different cat 5e and cat6 cables so I assume not a faulty cable issue.

If I plug the ONT into the FritzBox 7490 eth0 then I get a link from the ONT just fine.

Do I have a faulty ER4 on hand ?