OpenVPN bridging mode with VMware

This week I had to setup an OpenVPN in bridged mode. I did it the usual a way. After the setup was done I had to face a problem. The VPN client was connecting to the VPN server and was able to ping it. However it was not able to reach the rest of the LAN on the server side. After several hours I found that I needed to activate promiscuous mode on my virtual switch. After that everything worked fine !