Sorry for beeing unclear - at the beginning, I had an another initial situation.
I have 2x 1 GBit copper wan cables going inside to the firewall.
The other card with two ports in the firewall (I have 4x 1 GBit ports) is connected with a Cisco Layer 3 Switch/Router.
At the moment the Firewall is connected with a Carp interface to the Cisco switch and I want to change this to an LACP to get the, hopefully, possibility to utilize the two 1 GBit WAN ports.
Now (Failover):
CARP LAN with 2 ports -> pfSense -> 2x 1 GBit WAN links -> provider router
Later (Failover and 2 GBit on LAN side):
LAG with 2 ports -> pfSense -> 2x 1 GBit WAN links -> provider router
Edit
Got it... shitty VMware Workstation. Some trouble with duplicate Mac addresses.
The LACP is up and running but I can't verify my configured load-balance mode (src-ip). When I have one download I have 12 MB/s (LAN 100 MBit and WAN 1 GBit) and with two computers I have 2x 6 MB/s.
Edit2
Ok guys - in the end, I realized that one of the network cards are broken. After buying a new card - everything is working like a charm