BDCOM. How to determine which SFP is in the EPON port

Once it was necessary to determine which SFP modules are in EPON ports, namely C+ or C++.

First, enable DDM to see information about optical power, see my article: BDCOM OLT DDM SNMP OID

Having connected to the BDCOM, I ran the command to view information about the network interface:

show interface epoN 0/1

Below you can see what information I have displayed:

EPON0/1 is up, line protocol is up
  Ifindex is 7, unique port number is 7
  Hardware is Giga-PON, address is 8479.735b.ad9b (bia 8479.735b.ad9b)
  MTU 1500 bytes, BW 1000000 kbit, DLY 2000 usec
  Encapsulation ARPA
  Flow-Control Off
  DDM info:
    TX power:6.30 dBM, RX power:-Inf dBM
    SFP temperature:59.94 C,supply voltage :3.36V,Bias Current.:39.60mA

We look at the DDM information, namely TX power, I have 6.30 dBM displayed, this means that the SFP module is C++, since the C+ modules shine with a power of about 4 dBM, and C++ about 6 dBM.

An example of viewing information about SFP modules in ethernet ports:

show interface gigaEthernet 0/5

For example, I displayed:

GigaEthernet0/5 is up, line protocol is up
  Transceiver Info:
    SFP,LC,1490nm,1000BASE-FX,SM 80KM
   DDM:YES,vend name:OEM
  DDM info:
    TX power:1.26 dBM, RX power:-7.35 dBM
    SFP temperature:62.56 C,supply voltage :3.28V,Bias Current.:20.35mA

Note that I had cases when the maximum distance in kilometers was displayed incorrectly, probably this is due to the firmware of the SFP module, for example, a 60KM module, and 80KM is displayed in the BDCOM terminal, therefore, when installing an SFP module, it is better to immediately make a mark somewhere, for example in the monitoring system, etc., so as not to make mistakes later.

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