Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP All
Known Affected Versions:
11.0.0, 11.4.1, 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
Fixed In:
11.6.0, 11.5.1 HF6, 11.4.1 HF9
Opened: Jul 09, 2014 Severity: 3-Major Related Article:
K15713
You might see TMM segfaults when the system attempts to apply TSO processing to an outbound packet that does not need it.
TMM crashes and the system fails over. This occurs rarely.
Occurs when applying TSO to packets.
You can work around this by disabling TCP segmentation offload. To do so, modify the tm.tcpsegmentationoffload value using the following command: tmsh modify sys db tm.tcpsegmentationoffload value disable.
TMM now correctly applies TSO processing to outbound packets, so TMM no longer segfaults.