Symptoms
QSFP modules that do not support DDM (Digital Diagnostic Monitoring), write messages to /var/log/ltm indicating DDM is not supported, however, there are certain unsupported DDM F5-branded SFP modules that do not write a message to the log.
Impact
DDM is not reporting information for the following optics:
Unsupported DDM 1Gb-10GB SFP modules:
OPT-0004
OPT-0007
OPT-0011
OPT-0015
OPT-0051
OPT-0033
Conditions
Upon inserting the unsupported DDM SFP modules.
Fix Information
All DDM SFP 1Gb-10GB modules now log in /var/log/ltm that DDM is not supported with that optical transceiver.