display interface null

Function

The display interface null command displays the status of a null interface.

Format

display interface null [ 0 ] [ | { begin | include | exclude } regular-expression ]

Parameters

Parameter	Description	Value
0	Indicates the number of the null interface.	The value can only be 0.
\|	Filters the output by using the regular expression.	-
begin	Displays the information from the line containing the regular expression.	-
include	Displays all the lines that contain the regular expression.	-
exclude	Displays all the lines that do not contain the regular expression.	-
regular-expression	Specifies the regular expression.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

There is only one null interface, namely, Null0.

Example

# Display the status of the Null0 interface.

<sysname> display interface null 0
NULL0 current state : UP                                                        
Line protocol current state :UP (spoofing)                                      
Description: NULL0 Interface                            
Route Port,The Maximum Transmit Unit is 1500                                    
Internet protocol processing : disabled                                         
Physical is NULL DEV                                                            
    Last 300 seconds input rate 0 bits/sec, 0 packets/sec                       
    Last 300 seconds output rate 0 bits/sec, 0 packets/sec                      
    Realtime 2 seconds input rate 0 bits/sec, 0 packets/sec                     
    Realtime 2 seconds output rate 0 bits/sec, 0 packets/sec                    
    Input: 0 packets,0 bytes,                                                   
           0 unicast,0 broadcast,0 multicast                                    
           0 errors,0 drops,                                                    
    Output:0 packets,0 bytes,                                                   
           0 unicast,0 broadcast,0 multicast                                    
           0 errors,0 drops                                                     
    Input bandwidth utilization  : 0.00%                                        
    Output bandwidth utilization : 0.00%

**Table 1** Description of the **display interface null** command output
Item	Description
current state:	Indicates the physical status of the null interface. The physical status of the null interface keeps Up.
Line protocol current state:	Indicates the link layer protocol status of the null interface. The link layer protocol status of the null interface keeps Up.
Description:	Indicates the description of the interface. Up to 242 case-sensitive characters (including spaces) can be entered. The description helps you to know the functions of the interface.
The Maximum Transmit Unit is	Indicates the maximum transmission unit (MTU). The value is 1500 bytes.
Internet protocol processing : disabled	Indicates that no IP address is assigned to the interface.
Physical is NULL DEV	Indicates that the interface does not exist physically.
Last 300 seconds input rate Last 300 seconds output rate	Indicates the rates for sending and receiving the bytes and the packets by the interface in the last five minutes. You can modify the statistics collection interval using the set flow-stat interval command.
Realtime 2 seconds input rate Realtime 2 seconds output rate	Indicates the real-time rates of sending and receiving the bytes and the packets within 2 seconds. It refers to the interval between two display commands that are run on the same interface. The maximum value is the statistical interval displayed in the previous piece of information. This entry is displayed only when information about a logical interface is viewed.
Input:	Indicates the total number of packets and the total number of bytes received by the interface.
Output:	Indicates the total number of packets and the total number of bytes sent by the interface.
Input bandwidth utilization	Indicates the percentage of the rate for receiving packets to the total bandwidth.
Output bandwidth utilization	Indicates the percentage of the rate for sending packets to the total bandwidth.