Oct 9, 2026, 2:52 PM@pertho if it's not coming from DHCPv6 / your DHCP daemon, it definitely seems like it could be coming from RAs. What's your router and it's configuration for router advertisements?
- Oct 9, 2026, 2:52 PM
Replies
Oct 9, 2026, 8:50 PM@hugo I'm using some sort of rebranded Sagemcom WiFi 7 router my ISP gave me.
- Oct 9, 2026, 8:55 PM
@pertho gotcha. So, limited visibility into what the router itself is doing, yea?
But for DHCPv6, that's where you specified your intended DNS servers? In DHCPv6 configuration of the ISP-provided Sagemcom router? Is there anywhere in the admin UI for that Sagemcom device to configure the IPv6 router advertisements?
If not, we'd probably be at the point of doing packet captures for icmp6 on a machine on the network to try to see if the router is setting its own link local IPv6 address in RDNSS in the router advertisements.