Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1
Fixed In:
14.1.0
Opened: Apr 23, 2018 Severity: 3-Major Related Article:
K59332523
If a TCP Segmentation Offload (TSO) packet length exceeds the rateshaper's max ceiling, it causes the flow to stall.
The flow stalls. Subsequent flows cannot go to the rateshaper from that particular tmm.
TSO packet length exceeds the rateshaper's configured max ceiling.
If you are running BIG-IP software v12.1.3.2 (or later) or v13.1.0(.x), you can use the following workaround: There is a sys db variable called 'rateshaper.cmpdivide', which is enabled by default. When enabled, the system internally divides the bandwidth (rate/ceiling/burst) between the available tmm cores. If this issue occurs, set 'rateshaper.cmpdivide' to enabled. There is no workaround for other versions.
Rateshaper no longer stalls when TSO packet length exceeds max ceiling.