Dear all,I have a problem when using 10g SR SFP+ in c9500 24y4c-e. I use that SFP module in 25ge native of c9500. The switch know that I am using 10g sfp but there is no optical signal at  transmit port of sfp as following picture What I should do to...

hi every one,I would like to use 2x c9500 24y4c-e to stack function. But i heard about that -E Network Essential does not support stack wise function. Can I use another stack function like tradition not stack wise or do i need to be upgrade license t...