I've already searched these, but all tables I could identify as a possibility to contain optical monitoring information are either empty or contain only data about a nonexistent fan (which is true as this is a fanless model).
So, if it's not in the mentioned mib package, the simple answer would be it's not implemented?
I've just experienced the same problem, so I went hunting through the MIB for a suitable table and I think I've found it.
What you want to check is CISCOSB-PHY-MIB::rlPhyTestGetTable which is a table of interface tests. It extends the normal SNMP ifTable so the rows are indexed by the ifIndex (57 & 58 for the two combo ports on an SG300-10) and the test type. It appears to contain tests such as the green ethernet tests and the fiber optic tests. This is what I get on one of my SG300-10's:
So for example to get the transceiver temperature for port gi10, it would be at OID .18.104.22.168.22.214.171.124.126.96.36.199.188.8.131.52.5.
Most of the values match up with the output I get from "show fiber-ports optical-transceiver detailed", with a bit of dividing by 1,000's to get into the same range, however I'm at a loss how to convert the milidbm output power reported by SNMP into milliwatts as reported by the CLI. Could someone confirm the maths for that?
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