Bug ID 557452: Messages logged when the CAN daemon (cand) receives unsolicited data

Last Modified: Sep 13, 2023

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

Known Affected Versions:
10.2.4, 11.2.1, 11.4.1, 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,,,,, 11.6.4, 11.6.5,,,, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:

Opened: Nov 10, 2015

Severity: 4-Minor


When the log filter is configured to filter at the 'Informational' log level, the logs can get filled with 'request for unsolicated data' messages. These messages appear in the log every 20 seconds.


Logs fill with messages. These messages are related to communication with the CAN daemon (cand), and are completely benign, so you can safely ignore them.


This occurs when using a remote syslog logging filter with the 'Severity' field set to 'Informational'.


Change the remote syslog logging level to 'Notice'.

Fix Information

Reduced the log level for cand reporting unsolicited data to the debug level.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips