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Configuring LAG
2
LAG Configuration
To complete LAG configuration, follow these steps:
1) Configure the global load-balancing algorithm.
2) Configure Static LAG or LACP.
Configuration Guidelines
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 the LAGs of the devices on both sides have the same number of member ports.
Ensure the both ends of a link have the same port parameter configurations,
including Speed, Duplex, Jumbo and Flow Control. Note that you should configure
these parameters for the LAG, because the member ports of the LAG follow the port
parameter configurations of the LAG instead of their own.
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.
For IGMP Snooping, 802.1Q VLAN, MAC VLAN, Protocol VLAN, VLAN-VPN, GVRP, Voice
VLAN, STP, QoS, DHCP Snooping, and the basic port parameters including Speed,
Duplex, Jumbo and Flow Control, the member pot of an 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 an LAG cannot be enabled
with these functions.
LAG Configuration
Configuration Guide
107
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