Bug ID 603690: CPU Saver option not working while the 'latency' compression provider selection algorithm is in use.

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 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

Fixed In:
13.0.0

Opened: Jul 08, 2016
Severity: 2-Critical
Related AskF5 Article:
K82210057

Symptoms

CPU Saver option not working while the 'latency' compression provider selection algorithm is in use.

Impact

Edge Client shows the VPN tunnel as 'Connected' but no traffic flow. This is an intermittent issue.

Conditions

APM Edge Client over VPN tunnel. The issue tends to occur when CPR Saver is configured on the Edge Client on devices where hardware compression cannot perform the specific type of compression/decompression being requested.

Workaround

You can use either of the following workarounds: -- Enable CPU Saver in the secure connectivity profile. + To do so in the GUI: 1. Navigate to GUI: Access Policy :: Secure Connectivity :: profile_name :: Compression Settings :: Network Access. 2. Check the CPU Saver checkbox. + To do so in tmsh, run the following command: tmsh modify apm profile connectivity dummy compress-cpu-saver true -- Configure compression strategy to 'speed' (from 'latency'). To do so, run the following command: tmsh modify sys db compression.strategy value "speed".

Fix Information

Fixed an issue with the CPU Saver option not working while the 'latency' compression provider selection algorithm was in use. This mitigates a bottleneck when Software Compression is in use, correcting a problem with the tunnel stalling.

Behavior Change