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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 to 0.
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 the 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.
regular-expression: Specifies a regular expression, which is a case sensitive string of 1 to 256 characters.
Description
Use the display interface null command to display information about the null interface. Since Null 0
interface is the only null interface on a device, this command displays information about Null 0 interface
even if you do not specify the 0 keyword.
• If you do not specify the null keyword, this command displays information about all interfaces on
the device.
• If you specify the null keyword, this command displays information about interface Null 0 with or
without the 0 keyword, because the device supports only one interface Null 0.
Related commands: interface null.
Examples
# Display information about null interface Null 0.
<Sysname> display interface null 0
NULL0 current state :UP
Line protocol current state :UP (spoofing)
Description : NULL0 Interface
The Maximum Transmit Unit is 1500
Internet protocol processing : disabled
Physical is NULL DEV
Last clearing of counters: Never
Last 300 seconds input: 0 bytes/sec, 0 bits/sec, 0 packets/sec