Command to Expedite ISSU on Cisco Nexus 7000 Series Switch

B.

The correct answer is B. "install all kickstart <image> system <image> parallel".

ISSU (In-Service Software Upgrade) is a feature that allows upgrading of Cisco Nexus 7000 Series Switches without disrupting the traffic flow. This feature is enabled by having redundant supervisor modules and two or more I/O modules. ISSU uses a process called parallel processing to reduce the amount of time it takes to complete the upgrade.

The command "install all kickstart <image> system <image> parallel" reduces the amount of time it takes to complete the ISSU on a Cisco Nexus 7000 Series Switch that has dual supervisor modules and two I/O modules. The command installs the new kickstart and system images on both supervisor modules and all I/O modules in parallel.

Let's break down the command:

• "install all": This command installs the specified images on all modules of the switch.
• "kickstart <image>": This specifies the new kickstart image to be installed.
• "system <image>": This specifies the new system image to be installed.
• "parallel": This option enables parallel processing, which means the upgrade process will be done simultaneously on both supervisor modules and all I/O modules.

Option A ("insinstall all epld bootflash:<image> parallel") is incorrect because it installs only the EPLD (Field-Programmable Gate Array) images in parallel. This command does not upgrade the kickstart or system images.

Option C ("install all kickstart <image> system <image>") is incorrect because it does not enable parallel processing. Without parallel processing, the upgrade process will take longer.

Option D ("install all epld bootflash: <image>") is incorrect because it installs only the EPLD images, which are responsible for managing hardware components. This command does not upgrade the kickstart or system images.