OPNsense 17.1.8 WAN2 interface flapping

[epicavic]

Hello,

platform description:
- dual ISP (configured as failover GW group)
- allow default gateway switching enabled
- LAN traffic routed to GW roup
- WAN2 phys link is up all the time
- DynDSN is disabled
- defaut GW is WAN1_GW

noticed pretty weird behavior for dual-homed ISP connection on latest version of opnsense:
- lan interface become unavailable via icmp
- every 20 min router loosing connection with ISP gateway on WAN2 interface.
- after 10-15 min connection restores
- after connection restore - router sets default route via WAN2_GW (although it shouldn't because WAN1_GW is up and running and WAN1_GW is a default gateway)
- every connection loss and recovery are followed by:
Jun 26 xx:xx:xx configd.py: [xxxx] updating dyndns WAN2_ISP_DHCP
Jun 26 xx:xx:xx configd.py: [xxxx] updating rfc2136 WAN2_ISP_DHCP
Jun 26 xx:xx:xx configd.py: [xxxx] Restarting OpenVPN tunnels/interfaces

Issue occurred right after upgrading from opnsense v16.7 to latest available version

Let me know if you have seen similar behavior and what's the possible fix for that

[Wayne Train]

Hi,
do you use also CARP for HA ?
Regards,
Wayne

[epicavic]

Hi,

no just wan group
issue was solved by downgrading to opnsense 16.7