200-150 · Question #112
The kickstart image is corrupted on a Cisco Nexus 7000 switch. Which procedure is used to download a new kickstart image?
The correct answer is C. Boot the system and press the Esc key after the BIOS memory test to interrupt the boot loader.. On a Cisco Nexus 7000, pressing Esc after the BIOS memory test completes drops the system to the loader prompt where a new kickstart image can be downloaded.
Question
The kickstart image is corrupted on a Cisco Nexus 7000 switch. Which procedure is used to download a new kickstart image?
Options
- ABoot the system and press Ctrl-] while the memory test is in progress to interrupt the boot loader.
- BBoot the system and press the Esc key while the memory test is in progress to interrupt the boot
- CBoot the system and press the Esc key after the BIOS memory test to interrupt the boot loader.
- DBoot the system and press Ctrl-] after the BIOS memory test to interrupt the boot loader.
How the community answered
(37 responses)- A3% (1)
- B3% (1)
- C89% (33)
- D5% (2)
Why each option
On a Cisco Nexus 7000, pressing Esc after the BIOS memory test completes drops the system to the loader prompt where a new kickstart image can be downloaded.
Ctrl-] is not the interrupt key for the Nexus 7000 boot loader and pressing any key during the memory test is too early in the boot sequence to reliably reach the loader prompt.
Pressing Esc during the memory test rather than after it is too early and will not trigger the boot loader interrupt on the Nexus 7000 platform.
Pressing Esc after the BIOS memory test on the Nexus 7000 interrupts the normal boot sequence and presents the loader> prompt, from which the administrator can use TFTP or USB to download a replacement kickstart image to bootflash and then manually initiate a boot. The key must be pressed after the memory test, not during it, because the boot loader interrupt hook is only armed once the memory test has finished and control passes to the next boot stage.
Ctrl-] is not the correct key for the Nexus 7000 boot loader interrupt; the Esc key is required, and timing also matters - it must be pressed after the BIOS memory test completes.
Concept tested: Nexus 7000 boot loader interrupt for kickstart recovery
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus7000/sw/system-management/configuration/guide/b_Cisco_Nexus_7000_NX-OS_System_Management_Configuration_Guide/b_Cisco_Nexus_7000_NX-OS_System_Management_Configuration_Guide_chapter_011.html
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