I tried to replace 2 port Cisco 2960 switch(WS-C2960x-24ps-L) with Cisco WS-3850-48PS. I configured it in a simlar way as we just needed to upgrade to 48 port switch we had no spare 3750 2960 with 48 ports.
However when the switch was shipped to site, it is accessible via ssh , Vlans are up and we can ping router gateway and internet from switch but any device Phone , Laptop connected does not come up on switch , Only a printer is up on the switch .
We teste connecting IP phone directly on to switch port but no power , so i am thinking is it something to do with PoE side of the switch.
Can someone assist in this issue,
I can provide outputs from new switch if required