Convert pfsense Carp failover L3 firewall to carp failover transparent firewall

[grzmrc]

hi all,
I have 2 pfsense 2.1 box configured as traditional Carp Failover:

box1
LAN 10.0.8.1/25
WAN 192.168.1.1/24 gw 192.168.1.122
Sync 192.168.222.1/24

box2
LAN 10.0.8.2/25
WAN 192.168.1.2/24 gw 192.168.1.122
Sync 192.168.222.2/24

Carp LAN VIP=10.0.8.122/25
Cerp WAN VIP=192.168.1.121/24

it works very well, but the corporate network will change and I'll must adeguate my configuration.

the corporate router LAN interface will change from 192.168.1.122 to 10.0.8.122.

I think that the only way I have to make pfsense works again, is to convert it in a transparent firewall.

The new configuration is the following…
box1
LAN 10.0.8.1 /25
WAN 10.0.8.101/25 gw 10.0.8.122
Sync 192.168.222.1/24

box2
LAN 10.0.8.2/25
WAN 10.0.8.102/25 gw 10.0.8.122
Sync 192.168.222.2/24

Carp LAN VIP=10.0.8.121/25
Cerp WAN VIP=10.0.8.120/25

Obviously the phisical connections are
WAN PFsense - router
LAN  pfsense - internal switch

When I try to bridge LAN and WAN interface, the switch stops to work correctly and clients stop to comunicate (loop???).

May you help me to solve the issue and correctly convert my configuration in a transparent firewall with failover?
thanks