Link Aggregation Control Protocol (LACP)
Port Aggregation Protocol (PAgP)
One element of an IEEE specification (802.3ad) that provides guidance on the practice of bundling individual links of Ethernet connections
Cisco Systems proprietary networking protocol, which is used for the automated, logical aggregation of Ethernet switch ports, known as an EtherChannel. Cisco’s Version of LACP
There are 2 ways to Configure EtherChannel
It is also possible to configure a static or unconditional EtherChannel without PAgP or LACP