Last Modified: Oct 16, 2023
Affected Product(s):
BIG-IP All
Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 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
Fixed In:
11.4.1 HF3
Opened: Jan 03, 2014 Severity: 2-Critical Related Article:
K16373
For a lossless mode switch configuration associated with ingress buffering, there is a potential for the switch to experience head-of-line blocking during periods of egress contention/congestion, where lower ingress limits may result in ingress dropping of sensitive traffic. This affects the following platforms; PB200, 11000, 11050, B2100, 5000, 7000.
Traffic over the high speed 1 GB link gets impacted by buffering on the low speed 10 MB link.
This might occur when the system sends logging data at a speed higher than the physical interface to the logging server can support, for example 50Mbps of HSL to a 10Mbps ethernet link.
None
Avoid head-of-line-blocking (or lossless mode) with CoS queue dropping by enabling mmu queue egress limit thresholds.