Hi, There is not a restriction Page 8 [URL] for the partner switch, only for the peers. MLAG will present as a single switch to the partner so the vswitch should be unaware that there are two switches connected. You will probably need to use a dvswitch. It is not a validated configuration though and it may not work as well as MLAG between a fully physical layer switch.  
Hi I should deploy a new vSphere6 with 8*R910 servers and 2*N4032F switches. The 2 switches would be default gateway for VMs, and connect to a core Cisco switch. So I want to know if I could use vSphere vSwitch or dvSwitch to be a partner switch with them in MLAG.If no,could I only use VRRP to make it HA? Thanks.
Could I use the MLAG feature of N series switches with vSwitch？