F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Command Reference-6PW100

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interface loopback
Use interface loopback to create a loopback interface or enter loopback interface view.
Use undo interface loopback to remove a loopback interface.
Syntax
interface loopback interface-number
undo interface loopback interface-number
Views
System view
Default command level
2: System level
Parameters
interface-number: Specifies a loopback interface by its number, ranging from 0 to 1023.
Examples
# Create interface loopback 5.
<Sysname> system-view
[Sysname] interface loopback 5
[Sysname-LoopBack5]
Related commands
display interface loopback
interface null
Use interface null to enter null interface view.
Syntax
interface null 0
Views
System view
Default command level
2: System level
Parameters
0: Specifies interface Null 0. The null interface number is fixed to 0.
Usage guidelines
A device has only one null interface, always named interface Null 0. Interface Null 0 is always up. You
cannot remove it or shut it down.
Examples
# Enter Null 0 interface view.
<Sysname> system-view
[Sysname] interface null 0
[Sysname-NULL0]