Link Aggregation; Chapter 17 Link Aggregation; Link Aggregation Overview; Dynamic Link Aggregation - ZyXEL Communications MES-3528 User Manual

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This chapter shows you how to logically aggregate physical links to form one
logical, higher-bandwidth link.

17.1 Link Aggregation Overview

Link aggregation (trunking) is the grouping of physical ports into one logical
higher-capacity link. You may want to trunk ports if for example, it is cheaper to
use multiple lower-speed links than to under-utilize a high-speed, but more costly,
single-port link.
However, the more ports you aggregate then the fewer available ports you have. A
trunk group is one logical link containing multiple ports.
The beginning port of each trunk group must be physically connected to form a
trunk group.
The Switch supports both static and dynamic link aggregation.
Note: In a properly planned network, it is recommended to implement static link
aggregation only. This ensures increased network stability and control over the
trunk groups on your Switch.
See Section 17.6 on page 158

17.2 Dynamic Link Aggregation

The Switch adheres to the IEEE 802.3ad standard for static and dynamic (LACP)
port trunking.
The IEEE 802.3ad standard describes the Link Aggregation Control Protocol
(LACP) for dynamically creating and managing trunk groups.
When you enable LACP link aggregation on a port, the port can automatically
negotiate with the ports at the remote end of a link to establish trunk groups.
MES-3528 User's Guide

Link Aggregation

for a static port trunking example.
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