R3721-F3210-F3171-HP High-End Firewalls Network Management Command Reference-6PW101

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Field Descri
p
tion
Link
Physical link state of the interface:
• UP—The link is up.
• ADM—The link has been administratively shut down. To
recover its physical state, perform the undo shutdown
command.
Protocol
Protocol connection state of the interface, which can be UP,
DOWN, or UP(s).
Main IP Main IP address of the interface
Description Description of the interface
Cause
Cause of a DOWN physical link. If the port has been shut down
with the shutdown command, this field displays Administratively.
To restore the physical state of the interface, use the undo
shutdown command.
display interface null
Syntax
display interface [ null ] [ brief [ down ] ] [ | { begin | exclude | include } regular-expression ]
display interface null 0 [ brief ] [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
0: Specifies interface Null 0. The null interface number is fixed at 0, because the firewall has only one
null interface.
brief: Displays brief interface information. If you do not specify this keyword, this command displays
detailed interface information.
down: Displays information about interfaces in the DOWN state and the causes. If you do not specify
this keyword, this command displays information about interfaces in all states.
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see Getting Started Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Description
Use display interface null to display information about the null interface. Since Null 0 interface is the only
null interface on the firewall, this command displays information about Null 0 interface even if you do not
specify the 0 keyword.