Configuring LAG LAG Configuration
Configuration Guide  
  123
Step 9 copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to specify the system priority of the switch as 2:
Switch#configure
Switch(config)#lacp system-priority 2
Switch(config)#show lacp sys-id
2, 000a.eb13.2397
Switch(config)#end
Switch#copy running-config startup-config
The following example shows how to add ports 1/0/1-4 to LAG 6, set the mode as LACP, 
and select the LACPDU sending mode as active:
Switch#configure
Switch(config)#interface range gigabitEthernet 1/0/1-4
Switch(config-if-range)#channel-group 6 mode active
Switch(config-if-range)#show lacp internal
Flags:  S - Device is requesting Slow LACPDUs
              F - Device is requesting Fast LACPDUs
              A - Device is in active mode
              P - Device is in passive mode
Channel group 6
Port       Flags    State     LACP Port Priority   Admin Key    Oper Key    Port Number   Port State
Gi1/0/1   SA         Up          32768                            0x6                     0x4b1           0x1                      0x7d
Gi1/0/2   SA        Down     32768                            0x6                      0                    0x2                       0x45
Gi1/0/3   SA        Down     32768                            0x6                       0                    0x3                      0x45
Gi1/0/4   SA        Down     32768                            0x6                       0                    0x4                      0x45
Switch(config-if-range)#end
Switch#copy running-config startup-config