Start first to configure the HP switch A5120 to do this you need to connect your computer with a console cable to the switch. And enter the system–view mode.
To rename the switch name you can use the command sysname
To configure an IP address on the default VLAN interface. (VLAN 1) use the command interface
Use the command quit to exit the interface setup.
To enable the http web interface
To enable telnet on the switch
Set an admin account for the switch
Set a line vty 0 4 password
Enter save to save the configuration.
To make a trunk on the A5120 switch
interface bridge-aggregation 1 link-aggregation mode dynamic quit interface GigabitEthernet 1/0/23 port link-aggregation group 1 quit interface GigabitEthernet 1/0/24 port link-aggregation group 1 quit interface bridge-aggregation 1 port link-type trunk port trunk permit vlan all
HP Procurve 2626 configuration.
To get the trunk working between the A5120 and the HP Procurve 2626 you need to do the following on the HP Procurve 2626 switch
Make a trunk on equal port speeds for example 1000Mbits (1Gb/s) configure these ports as an LACP trunk
To be sure configured first spanning-tree otherwise your switch hangs. And you can only do something on the console..