display interface null
Syntax
display interface [ null ] [ brief [ down | description ] ] [ | { begin | exclude | include } regular-expression ]
display interface null 0 [ brief [ description ] ] [ | { 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.
description: Displays complete interface descriptions. If you do not specify this keyword, the command displays only the first 27 characters of interface descriptions.
|: 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.
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. Because 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 detailed 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 Port priority: 0 Last clearing of counters: Never Last 300 seconds input: 0 bytes/sec, 0 bits/sec, 0 packets/sec Last 300 seconds output: 0 bytes/sec, 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 drops 0 packets output, 0 bytes, 0 drops
# Display brief information about interface Null 0.
<Sysname> display interface null 0 brief The brief information of interface(s) under route mode: Link: ADM - administratively down; Stby - standby Protocol: (s) - spoofing Interface Link Protocol Main IP Description NULL0 UP UP(s) --
For the output description, see Table 10.
NOTE: The switch does not support collecting statistics about average input or output rate of interface Null 0. These fields display 0. | ||