Hi, I have basically the same problem described here but I'm on 25.7.3
I get a static IPv4 address and IPv6 prefix from my provider.
My WAN settings:
IPv4 Configuration Type: PPPoE
IPv6 Configuration Type: DHCPv6
Request prefix only & Send prefix hint are both checked
Clients are able to connect to websites via IPv6 and my servers are reachable via IPv6 from the internet. Also IPv6 Ping via Interfaces > Diagnotics is working.
But if I want to Enable Gateway Monitoring the gateway is "Offline" and the Gateway monitor isn't starting with this error in the log:
Routes are there:
I also tried the give the gateway an IPv6 address from within my prefix without luck. If I uncheck "Request prefix only" the gateway still gets an fe80 address.
			I get a static IPv4 address and IPv6 prefix from my provider.
My WAN settings:
IPv4 Configuration Type: PPPoE
IPv6 Configuration Type: DHCPv6
Request prefix only & Send prefix hint are both checked
Clients are able to connect to websites via IPv6 and my servers are reachable via IPv6 from the internet. Also IPv6 Ping via Interfaces > Diagnotics is working.
But if I want to Enable Gateway Monitoring the gateway is "Offline" and the Gateway monitor isn't starting with this error in the log:
Code Select 
/usr/local/etc/rc.syshook.d/monitor/20-recover: The required WAN_DHCP6 IPv6 interface address could not be found, skipping.Routes are there:
Code Select 
ipv6	default	fe80::ded2:fcff:fe24:dd60%pppoe0	UGS	NaN	1492	pppoe0	WAN
ipv6	2606:4700:4700::1111	fe80::ded2:fcff:fe24:dd60%pppoe0	UGHS	NaN	1492	pppoe0	WANI also tried the give the gateway an IPv6 address from within my prefix without luck. If I uncheck "Request prefix only" the gateway still gets an fe80 address.
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