Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP All
Known Affected Versions:
11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4
Fixed In:
12.0.0, 11.6.0 HF5, 11.5.2
Opened: Sep 12, 2014 Severity: 2-Critical Related Article:
K15613
TMM might crash when DSACK is enabled
Traffic disrupted while tmm restarts.
This occurs rarely on a virtual server configured with a TCP profile that has DSACK (Duplicate Selective Acknowledgement) enabled.
Do not use TCP profile with the DSACK feature enabled.
TMM no longer attempts to transmit DSACKs after reassembly queue has been purged, so no TMM crash occurs.