Dear experts,
I do have 2x 2930F JL254A and 1x 2930F JL262A switch. The last mentioned was ordered just a few weeks ago while the two JL254A are in operation for three years already.
All three switches are running the same and latest firmware version V 16.11.0019.
The two JL254A are connected via a 10G DAC cable as per attached photo "1".
This works without any issues.
Together with the JL262A, I ordered additional DAC cables. Photo of type label see attached photo "2".
I wanted to build a VSF switch stack but the new DAC cables do not seem to work.
Side question: can I build a VSF (ring topology) between JL254A and JL262A? Firmware version is identical. Or is VSF only possible between excatly identical models?
I receive errors such as „self test failure err c1990000" and "self test failure err 004b0001" no matter, which two switches I test the cables with.
Can anyone help me? What is the reason for these error messages?
Thank you very much in advance,
Enrico