Last Modified: Jan 29, 2026
Affected Product(s):
F5OS F5OS-A
Known Affected Versions:
F5OS-A 1.8.0, F5OS-A 1.8.1, F5OS-A 1.8.2, F5OS-A 1.8.3
Opened: Oct 13, 2025 Severity: 3-Major
F5 rSeries Appliances may experience issues with port bringup when using an OPT-0036 in 4x10G bifurcated (breakout) mode. The system log will show an “init_etile: Cable check failed” message for one or more of the bifurcated ports. The system will not be able to establish a link on the port and the port status will remain down.
Port remains down.
rSeries Appliance using an OPT-0036 in 4x10G breakout mode running F5OS-A-1.8.3 or earlier.
None. Requires F5OS update.
None