Link Aggregation Configuration; Overview; Introduction To Link Aggregation; Introduction To Lacp - H3C S5600 SERIES Operation Manual

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Link Aggregation Configuration

When configuring link aggregation, go to these sections for information you are interested in:

Overview

Link Aggregation Classification
Aggregation Group Categories
Link Aggregation Configuration
Displaying and Maintaining Link Aggregation Configuration
Link Aggregation Configuration Example
Overview

Introduction to Link Aggregation

Link aggregation can aggregate multiple Ethernet ports together to form a logical aggregation group. To
upper layer entities, all the physical links in an aggregation group are a single logical link.
Link aggregation is designed to increase bandwidth by implementing load sharing among the member
ports in an aggregation group. Link aggregation group also allows for port redundancy, which improves
connection reliability.

Introduction to LACP

Link Aggregation Control Protocol (LACP) is designed to implement dynamic link aggregation and
deaggregation. This protocol is based on IEEE802.3ad and uses link aggregation control protocol data
units (LACPDUs) to interact with its peer.
With LACP enabled on a port, LACP notifies the following information of the port to its peer by sending
LACPDUs: priority and MAC address of this system, priority, number and operation key of the port.
Upon receiving the information, the peer compares the information with the information of other ports on
the peer device to determine the ports that can be aggregated. In this way, the two parties can reach an
agreement in adding/removing the port to/from a dynamic aggregation group.
Operation key is generated by the system. It is determined by port settings such as port speed, duplex
mode, and basic configurations (refer to
basic configurations).
Selected ports in a manual aggregation group or a static aggregation group have the same
operation key.
Member ports in a dynamic aggregation group have the same operation key.

Requirements on Ports for Link Aggregation

To achieve load sharing in an aggregation group, the member ports to perform load balancing must
have the same speed, duplex mode, and basic configurations, which include:
Requirements on Ports for Link Aggregation
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