EPLD updates on Cisco MDS 9000 Series Switches are characterized by updating hardware functionality on a device (Option B). This means that the updates can enhance device capabilities or address issues without the need for physical hardware changes. References := Cisco Data Center Core Technologies https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.htm