Re: the loadbalance policy of ip hash needs LACP?

Route Based on IP Hash need link aggregation, and LACP is one way to do link aggregation, but you can use Etherchannel too.

See: vSphere 6.0 Documentation Center

Limitations and Configuration Requirements

■	ESXi hosts support IP hash teaming on a single physical switch or stacked switches.
■	ESXi hosts support only 802.3ad link aggregation in Static mode . You can only use a static Etherchannel with vSphere Standard Switches. LACP is not supported. To use LACP, you must have a vSphere Distributed Switch 5.1 and later or Cicso Nexus 1000V. If you enable IP hash load balancing without 802.3ad link aggregation and the reverse, you might experience networking disruptions.
■	You must use Link Status Only as network failure detection with IP hash load balancing.
■	You must set all uplinks from the team in the Active failover list . The Standby and Unused lists must be empty.
■	The number of ports in the Etherchannel must be same as the number of uplinks in the team.