Bug ID 1604657: High CPU utilization and reduced throughput in certain conditions when connection mirroring is enabled in HA

Last Modified: May 06, 2025

Affected Product(s):
BIG_IP_NEXT(VE/HW) LTM(all modules)

Known Affected Versions:
20.2.1, 20.3.0

Opened: Jul 08, 2024

Severity: 3-Major

Symptoms

High CPU utilization and reduced throughput in certain conditions when connection mirroring is enabled in HA

Impact

High CPU utilization and reduced throughput is seen in HA setup as compared to a standalone system.

Conditions

Connection mirroring is enabled in HA. System is bombarded with short-term connections.

Workaround

Connection mirroring is usually reserved for long-lived connections or sessions. If the traffic pattern is short-term connections, disable connection mirroring.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips