25.07 RC - no default gateway being set if default route is set to a gateway group and the Tier 1 member interface is down

luckman212

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
WireGuard

I 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.

marcosm

I use a gateway group as the default gateway for both IPv4 and IPv6 and it works as expected - igb0 is tier 1 and igb1 is tier 2:

# netstat -rn | grep default
default            192.168.1.254      UGS            igb1
default                           fe80::da21:daff:fe19:dbb0%igb1 UG            igb1

# ifconfig igb0 | grep status
	status: no carrier

You can share the files/logs here for review:
https://nc.netgate.com/nextcloud/s/Dj3ZbjQstNB52e7