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TRENDnet User’s Guide
Industrial Managed Switch Series
64
Parameter Description
Group State
Select the group ID to use for this trunk group, that is, one logical
link containing multiple ports.
Select Enable to use this static trunk group.
Load Balance Configures the load balance algorithm for the specific trunk
group.
Member Ports Select the ports to be added to the static trunk group.
Apply Click Apply to configure the settings.
Refresh Click this to reset the fields to the last setting.
Trunk Group Status
Group ID This field displays the group ID to identify a trunk group, that is,
one logical link containing multiple ports.
State This field displays if the trunk group is enabled or disabled.
Load Balance This field displays the load balance policy for the trunk group.
Member Ports This field displays the assigned ports that comprise the static
trunk group.
LACP
The Switch adheres to the IEEE 802.3ad standard for static and dynamic (LACP) port
trunking.
The IEEE 802.3ad standard describes the Link Aggregation Control Protocol (LACP) for
dynamically creating and managing trunk groups.
When you enable LACP link aggregation on a port, the port can automatically negotiate
with the ports at the remote end of a link to establish trunk groups. LACP also allows
port redundancy, that is, if an operational port fails, then one of the “standby” ports
become operational without user intervention.
Please note that:

You must connect all ports point-to-point to the same Ethernet switch and
configure the ports for LACP trunking.

LACP only works on full-duplex links.

All ports in the same trunk group must have the same media type, speed,
and duplex mode and flow control settings.

Configure trunk groups or LACP before you connect the Ethernet switch to
avoid causing network topology loops.
System Priority:
The switch with the lowest system priority (and lowest port number if system priority is
the same) becomes the LACP “server”. The LACP “server” controls the operation of LACP
setup. Enter a number to set the priority of an active port using Link Aggregation Control
Protocol (LACP), the smaller the number, the higher the priority level.
System ID:
The LACP system ID is the combination of the LACP system priority value and the MAC
address of the router.
Administrative Key:
The administrative key defines the ability of a port to aggregate with other ports. A
port's ability to aggregate with other ports is determined by these factors:

Port physical characteristics, such as data rate, duplex capability, and
point-to-point or shared medium.

Configuration restrictions that you establish.
Port Priority:
The port priority determines which ports should be put in standby mode when there is a
hardware limitation that prevents all compatible ports from aggregating.
Default Settings:
The default System Priority is 32768.
The default group LACP state is disabled for all groups.