LACP

Reference

How to Etherchannel between Cisco and HP Procurve switches
http://evilrouters.net/2011/08/12/configure-lacp-between-hp-procurve-and-cisco-catalyst-switches

Cisco/HP LACP Spanning Tree issue
http://evilrouters.net/2010/04/16/hpcisco-lacp-and-stp-gotcha

Cisco Config

CISCO(config)# interface range fa0/1 - 3
CISCO(config-if-range)# spanning-tree portfast trunk
%Warning: portfast should only be enabled on ports connected to a single
host. Connecting hubs, concentrators, switches, bridges, etc... to this
interface  when portfast is enabled, can cause temporary bridging loops.
Use with CAUTION

CISCO(config-if-range)# channel-protocol lacp
CISCO(config-if-range)# channel-group 1 mode active
Creating a port-channel interface Port-channel 1
CISCO(config-if-range)# interface port-channel 1
CISCO(config-if)# switchport mode trunk
CISCO(config-if)#

CISCO(config-vlan)# vlan 10
CISCO(config-vlan)# vlan 20
CISCO(config-vlan)# vlan 30
CISCO(config-vlan)#

CISCO(config-vlan)# interface vlan 1
CISCO(config-if)# ip address 10.0.0.1 255.255.255.0
CISCO(config-if)# no shutdown
CISCO(config-if)#

HP Config

HP(config)# trunk 1-3 trk1 lacp
HP(config)#

HP(config)# vlan 10
HP(vlan-10)# tagged trk1
HP(vlan-10)# vlan 20
HP(vlan-20)# tagged trk1
HP(vlan-20)# vlan 30
HP(vlan-30)# tagged trk1
HP(vlan-30)#

HP(config)# vlan 1
HP(vlan-1)# ip address 10.0.0.2 255.255.255.0
HP(vlan-1)#