Configuring Link Aggregation 819
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Configuring Link Aggregation
This chapter describes how to create and configure link aggregation groups
(LAGs), which are also known as port channels.
The topics covered in this chapter include:
• Link Aggregation Overview
• Default Link Aggregation Values
• Configuring Link Aggregation (Web)
• Configuring Link Aggregation (CLI)
• Link Aggregation Configuration Examples
Link Aggregation Overview
Link Aggregation allows one or more full-duplex (FDX) Ethernet links of the
same speed to be aggregated together to form a LAG. This allows the switch
to treat the LAG as if it is a single link.
The PowerConnect 7000 Series switches support industry-standard LAGs
that adhere to the IEEE 802.3ad specification. The maximum number of
LAGs that may be configured is limited to the maximum number of ports
possible in the switch stack or stand-alone switch divided by two. This allows
for a flexible configuration of LAGs where LAGs may have up to eight ports
or as few as two ports. You can configure LAGs until all ports in the system are
assigned to a LAG.
Assignment of interfaces to dynamic LAGs is based on a maximum of 144
interfaces assigned to dynamic LAGs, a maximum of 72 dynamic LAGs and a
maximum of 8 interfaces per dynamic LAG. For example, 72 LAGs may be
assigned 2 interfaces each, or 18 LAGs may be assigned 8 interfaces each.
Each LAG can consist of up to eight 1 Gbps or eight 10 Gbps ports. When
eight Gigabit Ethernet ports are configured as a LAG, the maximum
bandwidth for the single, logical interface is 8 Gbps, and when eight 10 Gbps
ports are configured as a LAG, the maximum bandwidth for the single, logical
interface is 80 Gbps.
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