Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP PEM
Known Affected Versions:
11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2
Fixed In:
12.0.0
Opened: Sep 09, 2014 Severity: 3-Major
CPU utilization on an active device reaches 100% after a series of quick, inter-chassis HA failovers.
The issue may render the system not-operational. However, the chance for the issue to occur at the customer site under normal operations (HA failovers are infrequent) are low.
A substantial number of PEM sessions must be present in the system and a series of inter-chassis HA failovers are enacted in quick succession. If enough time (30-60 min) between HA failovers is afforded, the leaked session indexes are removed by CPPE before CPU utilization becomes a problem.
Restart the standby device after each HA failover.
None