I reinstalled everything in the main server... CentOS 7.3 and the Vitualizor...
Setup everything as guides explain and as I did in my other server... but when I create an INTERNAL IP POOL it didn't appear in virtualizor as Internal IP :(
Here is my ifconfig where you can see that the interfaces are on:
ifconfig
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
...