can anyone suggest me CBS350 Firmware upgrade Path from 3.2.1.1 to 3.5.0.26 . or i can go directly to the latest one . is there any documentation or source by which cisco guide for upgrade path ? 

I am facing issue with my CBS 350 switches.traffic Error Code; CRC & Aligin Errorstraffic Error Code. internal Mac Receive Errorstraffic Error Code: undersize Packets.screenshot is attached for your reference