FCOE between switches vs FCOE to host

So,  just for clarification

1.   FCOE between switches (NPV or E) -   no need for Edge trunk, restrict ethernet trunk to the FCOE VLANS ?

2.   FCOE to host -   edge trunk is needed.   ?

Additional question -   FIP vlan discovery operate on the native vlan - is it really needed to be allowed on the ethernet trunk (since it is multicast traffic and allowed on the trunk whether the native vlan is allowed or not). 

thanks