R0106-HP MSR Router Series Interface Command Reference(V7)

281
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Main IP Description
NULL0 UP UP(s) -- aaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
For the command output, see Table 36 and Table 37.
Related commands
• interface null
• reset counters interface null
interface loopback
Use interface loopback to create a loopback interface and enter loopback interface view.
Use undo interface loopback to remove a loopback interface.
Syntax
interface loopback interface-number
undo interface loopback interface-number
Default
No loopback interface exists.
Views
System view
Predefined user roles
network-admin
Parameters
interface-number: Specifies a loopback interface by its number in the range of 0 to 1023.
Usage guidelines
The physical layer state and link layer protocols of a loopback interface are always up unless the
loopback interface is manually shut down. You can establish a connection to a loopback interface to
achieve the following purposes:
• Prevent the connection from being affected by the physical state of the interface.
• Improve the reliability of the connection.
For example, you can establish a connection to a loopback interface in the following ways:
• Configure a loopback interface as the source interface for establishing an FTP connection.
• Use the loopback interface address as the Router ID in BGP.
Examples
# Create interface loopback 1.
<Sysname> system-view
[Sysname] interface loopback 1
[Sysname-LoopBack1]