M4300-28G-POE+: LAG + Port Mirroring results in high number of Transmit Packet Discards

Dear JohnC_V,

First of all, the devices in the environment:

- I am using a GigE Vision compliant industrial camera (2x1Gbit links) which data stream shall be mirrored to a probe port for further data processing.

- The uplink is connected to a workstation which is equipped with 10Gbit Ethernet card.

- The probe port is connected to a desktop computer which is equipped with 1Gbit Ethernet card.

- The cabling is established with CAT 6 cables.

- The packet size in this topology is mutable (but preferably 9000 bytes Jumbo packets shall be used). I performed measurements with packet sizes from 1000 bytes up to 9000 bytes, but I observed the same loss on the probe port.

Purpose in setting up LAGs
- The industrial cameras are equipped with 2x1Gbit ports (with PoE) and the two links transfers the raw camera image frames over GVSP protocol and the links shall be in the same aggregation group. Without a static mode LAG the camera driver can't access the camera.

- Device that will be connected to LAG
    - The LAG consists of the 2x1Gbit ports of the camera. The 2x1Gbit links are the trunk members and the LAG settings are the following:
        Admin mode: Enabled
        Hash Mode: 3 Src/Dest MAC, VLAN, EType, incoming port
        STP Mode: Enable
        Static Mode: Enable
        Link Trap: Enable
        Configured ports: port1, port2
        Active ports: port1, port2
        LAG state: Up
        Local Preference Mode: Disable

Please let me know if you need further information.

Best Regards,

I.