M4300-28G-POE+: LAG + Port Mirroring results in high number of Transmit Packet Discards
Hello, I have an issue with a M4300-28G-POE+ model. The setup I have is quite simple: * 2x1 Gbit links are used which are batched into a LAG * The LAG is mirrored to a probe port. * Jumbo packets are configured. When I generate network traffic on the two links, the 10Gbit uplink receives each of the packets of the LAG of course, but when I am listening on the probe port, ~40% of the packets are dropped. In the Detailed Port Statistics I can see the following: Total Packets Transmitted Successfully: 161364755 Transmit Packets Discarded: 73094691 This example was taken from a scenario when the overall network traffic on the LAG was ~170Mbit/s and on the probe port I measured ~100Mbit/s I've tried to change the configuration based on hints in the Netgear Community threads (like this, since the observation is quite similar: https://community.netgear.com/t5/Smart-Plus-Click-Switches/GS724T-High-number-of-Transmit-Packet-Errors/m-p/393029#M257). When I am not using Jumbo packets but LAG, I observe the same issue. I've updated the firmware to 12.0.2.15 but the issue still occurs on my test environment. Are there any suggestions how to deal with this problem? Best, I.