Last Modified: Apr 06, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.5.1.3
Fixed In:
21.0.0.1, 17.5.1.4
Opened: Nov 27, 2025 Severity: 2-Critical
When a system controller is removed from a VELOS chassis, any Active BIG-IP tenants running from that controller do not automatically fail over.
Tenant failover is delayed by up to 4 minutes when an active system controller of the active tenant is pulled out .
-- BIG-IP Tenant is active for a traffic group -- The BIG-IP tenant is running on a controller that is active for the partition on which the tenant is running -- The Active system controller is removed or powered off using AOM
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