adding here from https://redmine.pfsense.org/issues/16331 for more discussion and eyes:
On my home 6100 that I factory erased and formatted with a fresh 25.07RC via Netgate installer (25.07.r.20250715.1733) I am having a bad situation occur where the default route (0.0.0.0/0) gets removed if the link drops (no carrier) on my WAN. This includes during operation, or at boot-time. The default route is not replaced by anything, thus breaking just about everything.
I thought it might have been because I have a S2S Wireguard tunnel that uses Policy Based Routing and has a Peer with "Allowed IPs" set to 0.0.0.0/0 but I tried disabling that peer and the behavior continued. I have tried rebooting a few times to be sure this wasn't a one-off.
If I manually go to System > Routing and choose a specific V4 gateway (my Tier2) then things start to work again.
Similarly, if I ssh in and type
route add default <ip_of_my_tier2_gw>That gets things working temporarily as well.
My setup is:
FIOS via a 10Gtek SFP+ adapter on ix0 as Tier1 (DHCP+DHCP6) a Teltonika RUTX11 as my Tier2 WAN on ix2 (RJ45) LAN on ix1 (another SFP+ to a Unifi 10G switch)Packages installed currently are:
acme arping aws-wizard Backup Cron Filer iperf ipsec-profile-wizard mDNS-Bridge Netgate_Firmware_Upgrade Nexus pfBlockerNG Shellcmd softflowd sudo System_Patches Tailscale WireGuardI have a couple of status_output.tgz debug archives collected before and immediately after a reboot. Happy to send those off to whoever @netgate to help troubleshoot this, or any other sort of troubleshooting. I'm surprised nobody else has hit this during the beta testing.