Bug ID 606007: Invalid errors logged for QSFP+ OPT-0030 transceiver when DDM is enabled

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
Discovery TMOS(all modules)

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

Opened: Jul 20, 2016
Severity: 3-Major
Related AskF5 Article:
K84179835

Symptoms

When DDM (Digital Diagnostics Monitoring) is enabled, invalid threshold readings on OPT-0030 transceivers may cause SNMP traps to be created and errors to be logged to /var/log/ltm such as the following: 012c0017:3: DDM interface:5.0 transmit power too high warning.Transmit power(mWatts) 1.2940 1.2418 1.2640 0.9623

Impact

Invalid SNMP traps and errors in /var/log/ltm may be created. Note: When a "too high warning cleared" message follows the "too high warning.Transmit" in /var/log/ltm, the intermittent DDM errors can be ignored. For example, the following messages can be ignored (the interface number will be the interface with an OPT-0030, in this example 1/1.13): err bcm56xxd[5607]: 012c0017:3: DDM interface:1/1.13 transmit power too high warning.Transmit power(mWatts) 0.9845 1.2679 0.9854 1.1759. err bcm56xxd[5607]: 012c0019:3: DDM interface:1/1.13 transmit power too high warning cleared. All other instances of DDM errors could indicate a real issue that needs to be investigated.

Conditions

This issue may occur if all of the following conditions are met: - Running a platform with 40GbE QSFP+ ports. (Please confirm the platform's configuration by referring to the appropriate platform guide available here: https://support.f5.com/csp/knowledge-center/hardware) - Platform contains OPT-0030 transceiver where the label reads "OPT-0030-01". - The platform is running software with DDM support and DDM is enabled.

Workaround

Disable DDM by running the following command: tmsh modify sys db ddm.bcm56xxd.enable value disable.

Fix Information

None

Behavior Change