3com MSR 20-20 참조 매뉴얼

The “Hold timer” field of the display interface mp-group command represents 
the hold time of the link state (up/down) of the current interface, and the “LCP 
initial” field indicates that the link control protocol (LCP) is initialized. Refer to 
Table 117 for the description on the other fields.

display interface null [ 0 ]

Any view

0: Null interface number. This argument is always 0.

Use the display interface null command to view the state information about 
the null interface. Even if this argument is not specified, the state information 
about null interface 0 is displayed, because there is only one interface.

interface null.

# View the state information about 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 300 seconds input:

0 bytes/sec 0 packets/sec

Last 300 seconds output:

0 bytes/sec 0 packets/sec

0 packets input, 0 bytes, 0 drops

0 packets output, 0 bytes, 0 drops 

Refer to Table 117 for the description on the fields of the display interface null 
command.

display interface virtual-ethernet [ number ]

Any view

number: Virtual Ethernet (VE) interface number, which can be the number of any 
existing VE interface.

Use the display interface virtual-ethernet command to view the state 
information about the existing VE interfaces. If you do not provide a VE interface 
number, this command will display the state information about all the existing VE 
interfaces.