Hi!
As already mentioned with Version 2.13 (see other post of mine: http://forum.mikrotik.com/t/swos-lite-version-2-13-released/147685/1 ) the problem with SNMP on the GPEN21 still persists.
The values for SFP RX Power and SFP TX Power are not given (even though listed in Mikrotiks MIB), but shown on the Web Interface.
~# snmpwalk -v2c -c public 192.168.88.1 1.3.6.1.4.1.14988.1.1.19
iso.3.6.1.4.1.14988.1.1.19.1.1.2.3 = STRING: "SFP1"
iso.3.6.1.4.1.14988.1.1.19.1.1.5.3 = Gauge32: 0
iso.3.6.1.4.1.14988.1.1.19.1.1.6.3 = Gauge32: 65408
iso.3.6.1.4.1.14988.1.1.19.1.1.7.3 = Gauge32: 0
iso.3.6.1.4.1.14988.1.1.19.1.1.8.3 = Gauge32: 0
iso.3.6.1.4.1.14988.1.1.19.1.1.8.3 = No more variables left in this MIB View (It is past the end of the MIB tree)
While digging around i found out that the raw values of the SFP are almost directly given to the web browser and all the calculation is done there.
This makes sense if the resources in the GPEN21 are extremly thin.
All calculations are quite simple … except the ones for the SFP RX and TX Power. Which are given in linear steps of 0.1 microwatts. To arrive to dBm a logarithm would have to be calculated.
For the web interface, this happens in the browser, for SNMP however it would have to be calculated directly by the GPEN21 - and i guess it does not have the resources to do so.
Can you confirm or dismiss my theory @Mikrotik?
Beste regards