The command "show install all impact epld bootflash:n9000-epld.6.1.2.13.1.img" is used to display the impact of the EPLD (Electronic Programmable Logic Device) upgrade on the operation of the Cisco Nexus 9000 series switch. This command does not perform the upgrade; instead, it provides a report that shows what the upgrade would affect if it were to be executed. This is useful for planning and ensuring that the upgrade will not disrupt critical services or operations on the switch. References := * Cisco Nexus 9000 Series NX-OS Software Upgrade and Downgrade Guide, Chapter: Managing EPLD Images