Bug ID 662881: L7 mirrored packets from standby to active might cause tmm core when it goes active.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.5.3, 11.5.4, 11.5.5, 11.6.0, 11.6.1, 11.6.2, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1, 12.1.3, 11.6.3, 11.5.6

Opened: May 03, 2017

Severity: 3-Major

Related Article: K10443875

Symptoms

L7 mirrored packets from standby to active might cause tmm core when it goes active.

Impact

tmm crashes. Traffic disrupted while tmm restarts.

Conditions

-- Spurious ACK sent to the standby unit that is mirrored over to the active unit for processing. -- Matching connection on the active has not been fully initialized.

Workaround

None.

Fix Information

Spurious ACK no longer causes outage, instead the packet is dropped.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips