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5.2 LAG
LAG (Link Aggregation Group) is to combine a number of ports together to make a single
high-bandwidth data path, so as to implement the traffic load sharing among the member ports
in the group and to enhance the connection reliability.
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 Flow Control), are in a LAG, their configurations should be the same.
The ports, which are enabled for the half-duplex, Port Security, Port Mirror and MAC
Address Filtering, cannot 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, Static LAG and LACP Config
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 5-8 LAG Table
The following entries are displayed on this screen:
Global Config
Hash Algorithm:
Select the applied scope of Aggregate Arithmetic, which
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