LevelOne GES-2451 - Manual (Page 34)

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For the member ports in an aggregation group, their basic configuration must be the same. The
basic configuration includes STP, QoS, VLAN, port attributes, MAC Address Learning mode
and other associated settings. The further explains are following:
 If the ports, which are enabled for the 802.1Q VLAN, STP, QoS and Port Configuration
(Speed and Duplex, Flow Control), are in a LAG, their configurations should be the same.
 The ports, which are enabled for the Port Security, Port Mirror and MAC Address Filtering,
can not be added to the LAG.
If the LAG is needed, you are suggested to configure the LAG function here before configuring the
other functions for the member ports.
Tips:
1. Calculate the bandwidth for a LAG: If a LAG consists of the four ports in the speed of
1000Mbps Full Duplex, the whole bandwidth of the LAG is up to 8000Mbps (2000Mbps * 4)
because the bandwidth of each member port is 2000Mbps counting the up-linked speed of
1000Mbps and the down-linked speed of 1000Mbps.
2. The traffic load of the LAG will be balanced among the ports according to the Aggregate
Arithmetic. If the connections of one or several ports are broken, the traffic of these ports will
be transmitted on the normal ports, so as to guarantee the connection reliability.
The LAG function is implemented on the LAG Table and Static LAG configuration pages.
5.2.1 LAG Table
On this page, you can view the information of the current LAG of the switch.
Choose the menu Switching →LAG→LAG Table to load the following page.
Figure 5-6 LAG Table
The following entries are displayed on this screen:
 Global Config
Hash Algorithm: Select the applied scope of Aggregate Arithmetic, which
results in choosing a port to transfer the packets.

SRC MAC + DST MAC: When this option is selected,
the Aggregate Arithmetic will apply to the source and
destination MAC addresses of the packets.

SRC IP + DST IP: When this option is selected, the
Aggregate Arithmetic will apply to the source and destination