S5590-28T8XC-EI-H3 mirror configuration has packet loss logs
2025-06-26 14:54:43
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Network Topology
Problem Description
After configuring the mirror on-site, packet loss logs were observed on the source mirror port
Process Analysis
This device configuration mirroring function will occupy buffer. After mirroring is enabled on a port, mirrored packets will loopback once inside the port before being sent to the destination port of the mirroring. As a result, the packet sending process in the outbound orientation of the port will share the same cache buffer with the service packets forwarded in the outbound orientation of the port.
Solution
Enable burst mode and observe again. After enabling, all ports on the device will share the buffer, which can alleviate single-port congestion or expand port capacity. The buffer is used only after exceeding bandwidth.