[Freeswitch-dev] multiple nics

I have two nics and different ip's on different networks on these nics. I would like to bind FS sip to each of these so we can send and receive sip calls on both nics. But I am not clear how to do this. Do I just make two entries in vars.xml? Like this (one for each ip addres?) <X-PRE-PROCESS cmd="set" data="bind_server_ip=x.x.x.x."/> and that is all?