Last Modified: Oct 19, 2025
Affected Product(s):
F5OS F5OS
Known Affected Versions:
F5OS-A 1.1.1
Fixed In:
F5OS-A 1.4.0, F5OS-A 1.3.0
Opened: Aug 12, 2022 Severity: 2-Critical
The RJ45 interfaces on F5 r2000 and r4000 platforms link at 1G only once. If the link goes down, the interfaces cannot reestablish a link at 1G.
The RJ45 interface won't achieve a link.
When an RJ45 interface that is 10G/1G capable is connected to a 1G port on F5 r2000 and r4000 platforms.
To clear the no-link condition, reboot or power cycle the platform. The RJ45 link will then come up at 1G, but only once.
The RJ45 interfaces on F5 r2000 and r4000 platforms are now able to re-establish a 1G link.