Etherchannel L2 vs L3

PAgP (Port Aggregation Protocol) - Cisco Prop. DESIRABLE or AUTO or NONEGOTIATE
*in case the link is configured as ACCESS, or the "switchport nonegotiate" command
- Protocol Value: 0x0104
- Same multicast group MAC like CDP

LACP (Link Aggregation Control Protocol) - 802.3ad - ACTIVE or PASSIVE
- Multicast MAC: 01-80-C2-00-00-02
- During Detection transmits packets every second

LACP>
Check the DEFAULT PARAMETERS:
2#show lacp 1 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 1
                            LACP port     Admin     Oper    Port        Port
Port      Flags   State     Priority      Key       Key     Number      State
Gi3/0/19  SA      bndl      32768         0x1       0x1     0x7F        0x3D
Gi3/0/20  SA      bndl      32768         0x1       0x1     0x80        0x3D

"ON" - Doesnt use LACP or PaGP. BOTH sides MUST BE ON!!!
#do show etherch protocol
                Channel-group listing:
                ----------------------

Group: 13
----------
Protocol:   -  (Mode ON)


You can configure MAX 16 PORTS, out of which:
MAXIMUM 8 ACTIVE PORTS, and the other HOT STANDBY (activate if one of the first 8 fail). Which ones belong to
the ACTIVE group depends on the LACP PRIORITY, that can be configured:
(config-if)#lacp port-priority 1 <--- LOWER IS BETTER!!! (default is 32768)

L3 ETHERCHANNEL: Configure the Port-Channel interface statically, and all L3 configuration under it
Summary: 32     Po32(RU)         -        Gi1/0/23(P) Gi1/0/24(P)

L2 ETHERCHANNEL: LOGICAL INTERFACE CREATED AUTOMATICALLY. Best Practice (CONFIGURATION):
- Default Interface
- Channel Protocol and Group on physical interface (this creates Port Channel)
- Configure TRUNKING ENCAPSULATION under the PORT CHANNEL directly
- SHUT -> NO SHUT on PHYSICAL INTERFACES
Summary: 24     Po24(SU)        PAgP      Gi1/0/21(P) Gi1/0/22(P)

* "show interface trunk" Will show only Port Channel, but "show interface XX switchport" will show that the INT IS TRUNK


LOAD BALANCE the Etherchannel>
*CONFIGURED in the Global Config mode:
 (config)#port-channel load-balance ?
  dst-ip       Dst IP Addr
  dst-mac      Dst Mac Addr
  src-dst-ip   Src XOR Dst IP Addr
  src-dst-mac  Src XOR Dst Mac Addr
  src-ip       Src IP Addr
  src-mac      Src Mac Addr

 #show etherchannel load-balance
EtherChannel Load-Balancing Configuration:
        dst-mac

EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Destination MAC address
  IPv4: Destination MAC address
  IPv6: Destination MAC address