@Enwikuna Did you enabled WAN\LAN1 port as WAN? i got same with dual wan on my er605, if one of wan connection is enabled BUT no access to internet, in syslog every 30mins I get The online detection...

@Infosec-admin do you use dual wan? i got same with dual wan on my er605, if one of wan connection is enabled BUT no access to internet, in syslog every 30mins I get The online detection result of...

For everyone who want to turn off led, here's solution:

@Clive_A I apologize, my problem is that I did not notice how the switch after rebooting occupies 192.168.6.14 although the address is in reserved list 192.168.6.13 and I dont know why it is...

I think Firewall- Anti ARP spoofing setting with Permit the packets matching ip-mac binding entries only is similar to MAC Filter but a little better?

YES. Correct IP must be assigned because all IP and MAC Static. but I get Undefined network - no access to router.