Four modes of LACP and PAGP

Four modes of PAGP

Mode	Meaning
Open (ON)	The port does not negotiate, directly form the Ethernet channel, in this mode, the peer must also be on mode, the Ethernet channel to work properly.
Off (off)	Block ports from forming an Ethernet channel
Automatic (Auto)	In automatic mode, passive listening, do not initiate negotiation, wait for PAGP to negotiate the request packet, when the request occurs, the Ethernet channel is negotiated.
Hope (desirable)	This mode proactively initiates a request to negotiate an Ethernet channel for the switch.

Four models of LACP

Mode	Meaning
Open (ON)	The port does not negotiate, directly form the Ethernet channel, in this mode, the peer must also be on mode, the Ethernet channel to work properly.
Off (off)	Block ports from forming an Ethernet channel
Passive (passive)	In passive mode, passive listening, do not initiate negotiation, wait for LACP to negotiate request packets, and then negotiate the Ethernet channel when the request occurs.
Hope (desirable)	This mode proactively initiates a request to negotiate an Ethernet channel for the switch.

This article is from "I'm Still alive" blog, please be sure to keep this source http://hujizhou.blog.51cto.com/514907/1871437

Four modes of LACP and PAGP