Last Modified: Jul 28, 2026
Affected Product(s):
F5OS F5OS-C
Fixed In:
F5OS-C 1.8.2-HR1, F5OS v2.0.0
Opened: Jan 08, 2026 Severity: 2-Critical
Dataplane switch interfaces corresponding to the even slot of a BX520 blade may be incorrectly disabled, causing a link outage to the Dataplane port of the even slot BX520 blade.
VQF IMM watchdog timeouts appear in the FPGA manager log.
The Platform HAL sends a chassis platform response to the Chassis Manager indicating lop_ok is 0 for the even slot of a BX520 blade. Consequently, the Chassis Manager registers the blade as 'not present' (present = 0), prompting switchd to disable the port associated with the even-numbered slot.
Reboot both CCs. Can be performed in service if standby is rebooted first, followed by lsystem redundancy go-standby and then rebooting the new standby.
The Chassis Manager will not publish a loss of presence specifically for the even slot of BX520 blades, ensuring that the corresponding dataplane port is not inadvertently disabled by switchd.