Last Modified: Nov 29, 2025
Affected Product(s):
BIG_IP_NEXT(CNF) CNF
Known Affected Versions:
1.3.2, 1.3.3
Fixed In:
1.4.0
Opened: Nov 19, 2024 Severity: 2-Critical
-- ICMP Connection flow timeout has been set at 1 second irrespective of the monitor timeout. -- When the ICMP probes are sent to pool members, if there is a slight delay in the response, the connection flow may be cleared even before the response is received. -- This condition causes the probe to fail and thereby marking the pool member as down.
Monitor probes fail causing the pool member to be marked down intermittently even when the actual pool member is healthy and alive.
ICMP Connection flow timeout has been set to 1 second. If the ICMP response takes more than 1 second, the probes are marked as down.
None
This issue is fixed by modifying the ICMP Connection flow timeout based on the ICMP monitor timeout.