Bug ID 510119: HSB performance can be suboptimal when transmitting TSO packets.

Last Modified: May 29, 2024

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

Known Affected Versions:
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, 11.5.2 HF1, 11.5.3 HF1, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0, 11.6.0 HF6, 11.5.3 HF2

Opened: Mar 02, 2015

Severity: 3-Major

Related Article: K16792

Symptoms

For heavily fragmented TSO packets, it is possible to populate a high percentage of the HSB's transmit ring.

Impact

Suboptimal behavior might be seen when transmitting large fragmented TSO packets. There is a rare chance it can lead to a full or stuck transmit ring.

Conditions

This can happen when transmitting large fragmented TSO packets.

Workaround

Disable TSO.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips