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Forum Discussion
JonAB
Dec 11, 2025Follower
Issues with LACP with VLANs
Hi all, Network newbie here. I am having some trouble with VLAN's combined with LACP. The setup I have at the moment are purely for educating my self. It consists of: One Netgear GS724Tv4 On...
StephenB
Dec 11, 2025Guru - Experienced User
JonAB wrote:What am I missing?
LACP is designed so each data flow only runs over one port of the LAG. The traffic for that flow is not split over multiple ports. This approach prevents buffer overruns on the final destination link (which is presumed not to be a LAG).
You have two data flows, so there is a 50-50 chance they will be transmitted on the same port.
In general, LACP does a reasonable job of load balancing when there is traffic from a lot of devices running over the LAG. But as you are finding, the load balancing doesn't perform well if you only have a couple of data flows.
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