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14 LACP COMMANDS
This section describes commands used to configures the Link Aggregation
Control Protocol.
USAGE GUIDELINES
◆ You can create multiple links between devices that work as one virtual,
aggregate link. A port trunk offers a dramatic increase in bandwidth for
network segments where bottlenecks exist, as well as providing a fault-
tolerant link between two switches.
◆ The switch supports dynamic Link Aggregation Control Protocol (LACP).
LACP configured ports can automatically negotiate a trunked link with
LACP-configured ports on another device. You can configure any
number of ports on the switch to use LACP, as long as they are not
already configured as part of a static trunk. If ports on another device
are also configured to use LACP, the switch and the other device will
negotiate a trunk between them. If an LACP trunk consists of more
than eight ports, all other ports will be placed in standby mode. Should
one link in the trunk fail, one of the standby ports will automatically be
activated to replace it.
◆ Besides balancing the load across each port in the trunk, the other
ports provide redundancy by taking over the load if a port in the trunk
fails. However, before making any physical connections between
devices, configure the trunk on the devices at both ends. When using a
port trunk, take note of the following points:
■
To avoid creating a loop in the network, be sure you enable LACP
before connecting the ports, and also disconnect the ports before
disabling LACP.
■
You can create up to 12 trunks on a switch, with up to 28 ports per
trunk.
Table 22: LACP Commands
Command Function
lacp configuration Displays LACP configuration settings for specified ports
lacp mode Displays or sets LACP mode for specified ports
lacp key Displays or sets the LACP administration key for specified ports
lacp role Displays or sets the LACP initiation mode for specified ports
lacp status Displays the operational status for specified ports
lacp statistics Displays LACP statistics for specified ports
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