Introduction
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"FD 100/320Gbps NT and FX NT IHub System
Basics, Management and OAM Guide"
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Table 2 Command Syntax Symbols
Symbol Description
| A vertical line indicates that one of the parameters within the brackets or braces is required.
Example: tcp-ack {true|false}
[ ] Brackets indicate optional parameters.
Example: redirects [number seconds]
< > Angle brackets indicate that you must enter text based on the parameter inside the brackets.
Example: interface <interface-name>
{ } Braces indicate that one of the parameters must be selected.
Example: default-action {drop|forward}
[{ }] Braces within square brackets indicates that you must choose one of the optional parameters.
Example: sdp sdp-id [{gre|mpls}]
Bold Commands in bold indicate commands and keywords. 
Italic  Commands in italics indicate command options. 
Note —  For more information on CLI commands in general, 
see the CLI Command Guide