Bug ID 655506: Guest configurations with mergeable buffers disabled are not supported.

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0

Opened: Apr 05, 2017
Severity: 3-Major

Symptoms

Guest configurations with mergeable buffers disabled are not supported.

Impact

tmm core. Traffic disrupted while tmm restarts. When mergeable buffers are disabled, the 13.0.0 virtio driver crashes and the 13.1.0 driver stops processing, i.e., it does not attach to the device.

Conditions

Guest configuration explicitly disables mergeable buffers: <host mrg_rxbuf='off'/>.

Workaround

Do not disable mergeable buffers.

Fix Information

The system now logs an alert rather than enters a restart loop. Note: There is no plan to support disabled mergeable buffers.

Behavior Change