For the functions like
IGMP Snooping, 802.1Q VLAN, MAC VLAN, Protocol VLAN, VLAN-VPN,
GVRP, Voice VLAN, STP, QoS, DHCP Snooping
and
Flow-Control
, the member pot of a LAG
follows the configuration of the LAG but not its own. The configurations of the port can take
effect only after it leaves the LAG.
The port which is enabled with
Port Security, Port Mirror, MAC Address Filtering
or
802.1X
cannot be added to LAG, and the member port of a LAG cannot be enabled with these
functions.
The configuration guidelines are as follows:
•
Ensure that both ends of the aggregation link work in the same LAG mode. For example, if
the local end works in LACP mode, the peer end should be set as LACP mode.
•
Ensure that devices on both ends of the aggregation link use the same number of physical
ports with the same speed, duplex, jumbo and flow control mode.
•
A port cannot be added to more than one LAG at the same time.
•
LACP does not support half-duplex links.
•
One static LAG supports up to eight member ports. All the member ports share the traffic
evenly. If an active link fails, the other active links share the traffic evenly.
•
One LACP LAG supports more than eight member ports, but at most eight of them can be
active. Using LACP protocol, the switches negotiate parameters and determine the active
ports. When an active link fails, the link with the highest priority among the inactive links will
replace the faulty link and start to forward data.
•
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.
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.
6.2.1
LAG Table
On this page, you can view the information of the current LAG of the switch and configure the
Load-balancing Algorithm.
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