Conventions

Table 1, Table 2, and Table 3 list all the conventions used in the ERX documentation. Table 1 defines notice icons. Table 2 shows text conventions used throughout the book, except for command syntax. Table 3 provides command syntax conventions used primarily in the ERX Command Reference Guide. For more information about command syntax, see ERX System Basics Configuration Guide, Chapter 1, Planning Your Network.

Table 1 Notice icons 

Icon	Meaning	Description
	Informational note	Indicates important features or instructions.
	Caution	Indicates that you may risk losing data or damaging your hardware.
	Warning	Alerts you to the risk of personal injury.

Table 2 Text conventions (except for command syntax) 

Convention	Description	Examples
Bold typeface	Represents commands and keywords in text.	Command example: Issue the clock source command. Keyword example: Specify the keyword exp-msg.
Bold Courier typeface	Represents text that the user must type.	user input
Key name in angle brackets	Indicates the name of a key on the keyboard.	Press <Enter>.
Key names linked with a plus sign (+) in angle brackets.	Indicates that you must press two or more keys simultaneously.	Press <Ctrl+B>.
Plain Courier typeface	Represents information as displayed on your terminal's screen.	host1#show ip ospf 2 Routing Process OSPF 2 with Router ID 5.5.0.250 Router is an Area Border Router (ABR)
Italics	Emphasize words. Identify variables. Identify chapter, appendix, and book names.	There are two levels of access, user and privileged. clusterId, ipAddress. Appendix A, System Specifications.

Table 3 Syntax conventions in Command Reference Guide 

Convention	Description	Examples
Words in plain text	Represent keywords.	terminal length
Words in italics	Represent variables.	mask, accessListName
Words separated by the | symbol	Represent a choice to select one keyword or variable to the left or right of this symbol. (The keyword or variable may be either optional or required.)	diagnostic | line
Words enclosed in [ brackets ]	Represent optional keywords or variables.	[ internal | external ]
Words enclosed in [ brackets ]*	Represent optional keywords or variables that can be entered more than once.	[ level1 | level2 | l1 ]*
Words enclosed in { braces }	Represent required keywords or variables.	{ permit | deny } { in | out } { clusterId | ipAddress }