Hi, I apologize for my english, I’m glad if you can help.
one cc-1036-12G-4S switches, two cc-1009-8g-1s-1s + I switch device.
cc-1036 switcher switch centers. fiber cables connected to it with others. fiber SFP module from the internet with all sfp1 this switch on when I connect to the module LEDs are flashing (the light in the empty SFP slot) What could be the problem.