Bug ID 449580: HOL blocking due to pause frames received on external ports

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.4.1

Opened: Feb 20, 2014
Severity: 1-Blocking

Symptoms

Head-of-line blocking due to egress ports honoring RX pause frames, may result in ingress back-pressure drops on internal higig ports.

Impact

Blades honoring received pause frames on external interfaces can causes the internal higig interfaces on those blade to block all the ingress traffic, including MPI traffic.

Conditions

RX pause enabled on external interfaces.

Workaround

Disabling front-panel RX pause can prevent effects of the front-panel pause frames propagating.

Fix Information

None

Behavior Change