Ethernet Support Guide for HP-UX 11i v3

Variable The name of a variable that you may replace in a command or function or
information in a display that represents several possible values.
[ ] The contents are required in formats and command descriptions. If the contents
are a list separated by |, you must choose one of the items.
{ } The contents are optional in formats and command descriptions. If the contents
are a list separated by |, you may choose one of the items.
... The preceding element may be repeated an arbitrary number of times.
| Separates items in a list of choices.
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