Bug ID 1586641: OPT-0063 400G-FR4 periodically has non-zero RMON_RX_BAD_FCS

Last Modified: Jun 19, 2025

Affected Product(s):
F5OS F5OS-C(all modules)

Fixed In:
F5OS-C 1.8.1

Opened: May 16, 2024

Severity: 3-Major

Symptoms

Small number of FCS errors, up to approximately 100 per second, may be seen in FPGA 400G MAC RMON stats.

Impact

Small number of packets will be dropped for FCS failure.

Conditions

No special conditions known.

Workaround

Disable and re-enable the 400G link.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips