Last Modified: Jul 15, 2026
Affected Product(s):
F5OS F5OS-C
Fixed In:
F5OS v2.0.0
Opened: Feb 17, 2026 Severity: 3-Major
This failure looks like an RQM lockup. An RQM lockup can show up as a DMA receive failure or a DMA transmit failure. Receive failure because the receive queue will not accept HBM memory writes. Transmit failure because loopback health check packets will back up and flow control the transmit data-path.
This causes a data-path lock-up and traffic will not be passed by the affected blade.
No known conditions. This typically happens on initialization, but has been seen at runtime.
Reboot the system.
HBM calibration has been fixed.