We recommend that you first change the host side to LACP via the cluster vswitch. This will do a “rolling reboot” task which puts a host into Maintenance mode and makes the change to active / active with LACP and fallback enabled. Since the switch side is not setup we’ll fall back to active / backup.

Once host are done you then need to put a host into MM and make the switch configuration changes. Ensure this is working and then move to the next host.

You can find this below. 

https://portal.nutanix.com/page/documents/details?targetId=AHV-Admin-Guide-v6_8:wc-enable-lag-and-lacp-on-tor-switch-t.html

To verify LACP manually you can look at KB-3263 https://portal.nutanix.com/kb/000003263

Thanks a lot for your reply. 

Changing the Network mode from Active-Backup to Active-Active.  change it from cluster first make sure keep  fallback  enabled ( this will give you incase if one link goes down and LACP is not nego. you woun’t lose the network)

Once the Activie - Active task has been completed you can do the changes on switch side. one rule of tumb “ donot mix different speed of NIC in one bridge”

Below is the AHV Networking Best Practices guide, hope this will be use full 

https://portal.nutanix.com/page/documents/solutions/details?targetId=BP-2071-AHV-Networking:bp-ahv-networking-best-practices.html