Hi,
my customer is creating per tenant a seperate VLAN 
so its neccesary when creating a LIF the correct failover group must exist  PORTNAME-VLAN
So we need a:
net-failover-group-create
and
net-failover-group-delete API.
Right now customer must run a command like networt failover group create in CMD API.
Best wishes,
Markus..