Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2
Fixed In:
13.0.0, 12.1.2, 11.6.1 HF2, 11.5.4 HF3
Opened: Sep 30, 2015 Severity: 3-Major Related Article:
K02020031
A spurious ACK sent to the standby unit will be mirrored over to the active unit for processing. If a matching connection on the active has not been fully initialized, tmm will crash.
Traffic disrupted while tmm restarts.
HA active-standby configuration setup for L7 packet mirroring.
None.
Spurious ACK no longer causes outage, instead the packet is dropped.