Last Modified: Nov 26, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.1.2.2, 17.1.3, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 21.0.0
Opened: Jul 17, 2025 Severity: 3-Major
Https monitors may spuriously mark a pool member as down and it will fail to mark the pool member back up. The monitor remains in legacy mode, and probes are sent using TLS 1.0.
Bigd is stuck in legacy mode.
-- Server supports version TLSv1.2 and above. -- bigd is configured to monitor the server with SSL. -- The monitor flips into legacy mode.
Bigd can be brought out of legacy mode by detaching and re-attaching monitor to the pool.
None