I have a cisco L3 3850 catalyst switch connected to 5 stacks of L2 cisco 2960 switches. Suddenly amber light comes in stack 3 and stack 4 switches that too from port 25 to 46 alone in both stacks. That time network disconnects for few seconds and comes back to green.The same configuration has been running for around 4 years but suddenly issue araises now. Kindly help
