[e-nsp] Extreme X690/X870 with third party optics - DDMI broken?

[Simon Lockhart]

All,

Does anyone have any Extreme X690/X870 switches that they're using third
party optics in? Or come to that, Extreme 40G and 100G optics? :)

I'm trying to use 10G SFP+, 40G QSFP and 100G QSFP28's from Flexoptix in these
switches, and none of them are showing correct values in DDMI ("show port
transceiver info"). The 10G SFP+'s work fine in X460s and X670s and report
correct DDMI values.

Running 22.3.1.4 (and tried patch 1-4 too).

(10G LR SFP+)
X690.2 # show port 19 tran in

Port      Temp    TxPower  RxPower  TxBiasCurrent  Voltage-Aux1/ Voltage-Aux2
       (Celsius)   (dBm)    (dBm)     (mA)         Vcc (Volts)       (Volts)
================================================================================
19        0.35*    -16.27*    6.14*    0.17*         0.02*         N/A           
================================================================================


(40G LR4 QSFP)
X690.1 # show port 57 tran info

Port      Temp    TxPower  RxPower  TxBiasCurrent  Voltage-Aux1/ Voltage-Aux2
       (Celsius)   (dBm)    (dBm)     (mA)         Vcc (Volts)       (Volts)
================================================================================
57       -63.88*     1.73*   -1.42*    75.29*         6.54*         N/A           
           "       -12.65*    6.26*    5.15           "              "            
           "        7.20*    5.29*    114.73*          "              "            
           "        6.96*    7.31     63.01*          "              "            
================================================================================


I see the same symptoms on a 100G LR4 QSFP28 and 100G AOC cable.

I've even tried using a genuine Extreme 100G AOC cable and it shows the same
problem. I did log a TAC case for this particular problem, and they say it's
just cosmetic, because AOC cables don't need to provide DDMI info (and logged
a software bug to make it not display the incorrect values).

Unfortunately I don't have any genuine Extreme 10G, 40G or 100G optics to test
with (and at the price of genuine Extreme 100G optics, I'm highly unlikely to,
either!).

Anyone else seen this?

Simon