User's Manual

C HAPTER 4 | Configuring the Switch
Creating Trunk Groups
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◆ If the target switch has also enabled LACP on the connected ports, the
trunk will be activated automatically.
◆ A trunk formed with another switch using LACP will automatically be
assigned the next available trunk ID.
◆ 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
LACP System Status page (page 255) and LACP Port Status (page 255)
pages under the Monitor menu.
◆ 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.
◆ Aggregation Mode Configuration located under the Static Aggregation
menu (see "Configuring Static Trunks" on page 120) also applies to
LACP.
PARAMETERS
These parameters are displayed:
◆ Port – Port identifier.
◆ LACP Enabled – Controls whether LACP is enabled on this switch port.
LACP will form an aggregation when two or more ports are connected
to the same partner. LACP can form up to 12 LAGs per switch.
◆ Key – The LACP administration key must be set to the same value for
ports that belong to the same LAG. (Range: 0-65535; Default: Auto)
Select the Specific option to manually configure a key. Use the Auto
selection to automatically set the key based on the actual link speed,
where 10Mb = 1, 100Mb = 2, and 1Gb = 3.
◆ Role – Configures active or passive LACP initiation mode. Use Active
initiation of LACP negotiation on a port to automatically send LACP
negotiation packets (once each second). Use Passive initiation mode on
a port to make it wait until it receives an LACP protocol packet from a
partner before starting negotiations.