Chapter 3 Configuring The Switch; Starting The Switch; Boot Sequence; Image Files On The Switch - Cisco AJ732A - MDS 9134 Fabric Switch Configuration Manual

Cisco nexus 5000 series switch cli software configuration guide, nx-os 4.0(1a)n1 (ol-16597-01, january 2009)

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S e n d f e e d b a c k t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m

A Cisco Nexus 5000 Series switch starts its boot process as soon as its power cord is connected to an

A/C source. The switch does not have a power switch.

When the switch boots, the golden BIOS validates the checksum of the upgradeable BIOS. If the

checksum is valid, then control is transferred to the upgradeable BIOS image. The upgradeable BIOS

launches the kickstart image, which then launches the system image. If the checksum of the upgradeable

BIOS is not valid, then the golden BIOS launches the kickstart image, which then launches the system

You can force the switch to bypass the upgradeable BIOS and use the golden BIOS instead. If you press

Ctrl-Shift-6 within two seconds of when power is supplied to the switch, the golden BIOS will be used

to launch the kickstart image, even if the checksum of the upgradeable BIOS is valid.

When you press Ctrl-Shift-6, the console settings must be set to their defaults: 9600 baud, 8 data bits,

no parity, and 1 stop bit.

Before the boot sequence starts, the BIOS performs internal tests on the switch. If the tests fail, then the

loader does not gain control. Instead, the BIOS image retains control and prints a message to the console

at 9600 baud every 30 seconds that indicates a failure.

Cisco Nexus 5000 Series Switch CLI Software Configuration Guide

Boot Sequence, page 3-2

shows the normal and recovery boot sequence.

Configuring the Switch

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