American Fibertek SM9p - Manual (Page 143)

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State Activity
When you had setup the LACP aggregator, you can configure port state activity. You can
mark or un-mark the port. When you mark the port and click Apply button the port state
activity will change to Active. Opposite is Passive.
4. Active: The port automatically sends LACP protocol packets.
5. Passive: The port does not automatically send LACP protocol packets, and responds
only if it receives LACP protocol packets from the opposite device.
[NOTE]
1. A link having either two active LACP ports or one active port can perform dynamic
LACP trunk.
2. A link has two passive LACP ports will not perform dynamic LACP trunk because
both ports are waiting for and LACP protocol packet from the opposite device.
3. If you are active LACP’s actor, when you are select trunk port, the active status
will be created automatically.
Trunking – State Activity interface
Port Mirroring