ZyXEL GS2200-8/24 User Manual download pdf (Page 137)

GS2200-8/24 User’s Guide 137

CHAPTER 17

Link Aggregation

17.1 Overview

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

bandwidth link.

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.

17.1.1 What You Can Do

•Use the Link Aggregation Status screen (Section 17.2 on page 138) to view ports you have

configured to be in the trunk group, ports that are currently transmitting data as one logical link

in the trunk group and so on.

•Use the Link Aggregation Setting screen (Section 17.3 on page 140) to configure to enable

static link aggregation.

•Use the Link Aggregation Control Protocol screen (Section 17.4 on page 142) to enable Link

Aggregation Control Protocol (LACP).

17.1.2 What You Need to Know

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 17.5.1 on page 143 for a static port trunking example.

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. LACP also allows port redundancy, that

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ZyXEL GS2200-8/24 User Manual Page 137