Installation guide

C HAPTER 6 | Link Aggregation
Configuring LACP
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CONFIGURING LACP
Use the LACP Settings page to enable LACP on the switch and configure the
system priority.
USAGE GUIDELINES
◆ 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.
◆ If the target switch has also enabled LACP on the connected ports, the
trunk will be activated automatically.
◆ If more than eight ports attached to the same target switch have LACP
enabled, the additional ports will be placed in standby mode, and will
only be enabled if one of the active links fails.
◆ All ports on both ends of an LACP trunk must be configured for full
duplex, either by forced mode or auto-negotiation.
◆ Trunks dynamically established through LACP will be shown on the
Trunk Group Setting page (page 50).
◆ Ports assigned to a common link aggregation group (LAG) must meet
the following criteria:
■
Ports must have the same LACP Admin Key. Using auto-
configuration of the Admin Key will avoid this problem.
■
One of the ports at either the near end or far end must be set to
active initiation mode.
◆ The Distribution Algorithm Parameters configured on the Trunk Settings
page (see “Configuring Trunk Settings” on page 52) also applies to
LACP.
PARAMETERS
The following parameters are displayed on the configuration page for
dynamic trunks:
◆ LACP Status – Controls whether LACP is enabled on the switch. LACP
will form an aggregation when two or more ports are connected to the
same partner. LACP can form up to 8 trunks per switch.
◆ System Priority – LACP system priority is used to determine link
aggregation group (LAG) membership, and to identify this device to
other switches during LAG negotiations. (Range: 0-65535; Default:
32768)