53
Field Descri
tion
Interface Abbreviated interface name.
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 The main IP address of the interface.
Description Description of the interface.
Cause
The 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.
NOTE:
The switch does not support collecting statistics about average input or output rate of loopback interfaces.
These fields display 0.
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 device 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 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 Fundamentals Configuration 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.