LevelOne GSW-1676, User Manual

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P
ORT
C
ONFIGURATION
6-35
LACP Setup
This page allows you to enable 802.3ad Link Aggregation Control
Protocol (LACP) for the selected port.
You can configure any number of ports on the switch to use LACP. If
ports on another device are also configured for LACP, the switch and the
other device will negotiate a trunk link between them. However, before
making any physical connections, consider 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.
• 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.
• The ports at both ends of a trunk must be configured in an identical
manner, including communication mode (i.e., speed, duplex mode and
flow control), VLAN assignments, and CoS settings.
• Any of the Gigabit ports on the front panel can be trunked together,
including ports of different media types.
Field Attributes
• Port – A front panel port number.
• Enabled – Enables LACP for the selected port.
• Key Value – Configures a port's LACP administration key.
The port administrative key must be set to the same value for ports that
belong to the same link aggregation group (LAG). If this administrative
key is not set when an LAG is formed (i.e., it has the null value of 0), this
key will automatically be set to the same value as that used by the LAG.