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14 Link Aggregation
14.1 Description of the basic link aggregation functionality
14.1.1 Overview
Link aggregation is functionality that connects devices by establishing multiple links
between the Ethernet ports of each device, and that treats these links as one virtual link.
The virtual link is called a channel group. Link aggregation can expand bandwidth and
ensure redundancy between connected devices.
14.1.2 Link aggregation configuration
The figure below shows an example of a link aggregation configuration. In this example,
four ports are aggregated. If a fault occurs on one of these ports, the faulty port is detached
from the channel group, and communication continues by using the rest of the ports as the
channel group.
Figure 14-1 Example of a link aggregation configuration
14.1.3 Supported specifications
(1) Link aggregation modes
The link aggregation of the Switch supports LACP and static modes.
LACP link aggregation
LACP link aggregation uses the LACP (Link Aggregation Control Protocol) compliant
with IEEE 802.3ad. LACP link aggregation starts operation of a channel group when
LACP negotiation is successful. LACP is used to verify consistency and link
normality between devices.
Static link aggregation
Static link aggregation is link aggregation manually set by using configuration
commands. LACP is not used. Operation of a channel group starts when the ports in
the channel group are placed in the link-up status.
The following table shows the supported specifications for link aggregation.
Table 14-1 Supported specifications for link aggregation
Item
Number of channel groups per
device
Maximum number of ports per
group
Link aggregation modes
216
Supported specifications
8
8
LACP
Static
Remarks
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