Preface

This preface describes this guide and provides information about the conventions used in this guide, along with details about related documentation. It includes the following sections:

Document Revision History

The following table shows the changes made to this document:

Date

Change Summary

May 2018

First version of the document.

Document Objectives

This publication describes the instructions for addressing the Cisco Secure Boot Hardware Tampering Vulnerability on Cisco Catalyst 9800-40 Wireless Controller.

Audience

This publication is primarily a field notice for addresing the Cisco Secure Boot Hardware Tampering Vulnerability on Cisco Catalyst 9800-40 Wireless Controller.

Conventions

Text Type

Indication

User input

Text the user should enter exactly as shown or keys a user should press appear in this font.

Document titles

Document titles appear in this font.

System output

Terminal sessions and information that the system displays appear in this font.

CLI commands

CLI command keywords appear in this font .

Variables in a CLI command appear in this font .

[ ]

Elements in square brackets are optional.

{x | y | z}

Required alternative keywords are grouped in braces and separated by vertical bars.

[x | y | z]

Optional alternative keywords are grouped in brackets and separated by vertical bars.

String

A nonquoted set of characters. Do not use quotation marks around the string or the string will include the quotation marks.

< >

Nonprinting characters such as passwords are in angle brackets.

[ ]

Default responses to system prompts are in square brackets.

!

#

An exclamation point (!) or a pound sign (#) at the beginning of a line of code indicates a comment line.

Note
Means reader take note. Notes contain helpful suggestions or references to material not covered in the document.

Tip
Means the following information will help you solve a problem. The tips information might not be troubleshooting or even an action, but could be useful information, similar to a Timesaver.

Caution
Means reader be careful. In this situation, you might perform an action that could result in equipment damage or loss of data.

⏰ Timesaver: Means the described action saves time. You can save time by performing the action described in the paragraph.


Warning
IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device.

SAVE THESE INSTRUCTIONS