R3721-F3210-F3171-HP High-End Firewalls Network Management Command Reference-6PW101

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• If you do not specify the null keyword, this command displays information about all interfaces on
the firewall.
• If you specify the null keyword, this command displays information about interface Null 0 with or
without the 0 keyword, because the firewall 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
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 8.
interface loopback
Syntax
interface loopback interface-number
undo interface loopback interface-number
View
System view
Default level
2: System level
Parameters
interface-number: Loopback interface number, ranging from 0 to 1023.
Description
Use interface loopback to create a loopback interface or enter loopback interface view.
Use undo interface loopback to remove a loopback interface.
Related commands: display interface loopback.