To create a LACP trunk on an HP 2910 switch, follow these commands:

On both switches:

1. Log into the HP switch CLI, and enter configure mode
2. Identify the interfaces you want to use for the trunk and type:
   
   trunk 25-26 trk1 lacp
   
   "25-26" are the interfaces used in the trunk
   
   "trk1" defines this specific trunk
   
   "lacp" defines lacp as the trunking protocol
3. Now untag/tag the trunk with VLANs just like any other interface, example:
   
   vlan 10 tag trk1

If you want to remove an interface from the trunk, just use the no command: no trunk 25

Verify commands:

show lacp

show trunks