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Table 11 Command output
Field Description
Current state
Physical link state of the interface:
• UP—The loopback interface can receive and transmit packets.
• Administratively DOWN—The interface has been shut down
by using the
shutdown command.
Line protocol state
Data link layer state of the interface.
UP (spoofing)
means that the
data link layer protocol of the interface is up, but the link is an
on-demand link or does not exist. This attribute is typical of null
interfaces and loopback interfaces.
Description Description of the interface.
Bandwidth
Expected bandwidth of the interface. This field is not displayed when
the value is 0.
Maximum transmission unit MTU of the interface.
Internet protocol processing:
Disabled
The interface is not assigned an IP address and cannot process IP
packets.
Internet address: 1.1.1.1/32
(primary)
IP address of the interface. The
primary
attribute indicates that the
address is the primary IP address.
Physical: Loopback The physical type of the interface is loopback.
Last clearing of counters
Time when statistics on the logical interface were last cleared by
using the
reset counters interface
command.
If the statistics of the interface have never been cleared by using the
reset counters interface
command since the device
started, this field displays
Never
.
Last 300 seconds input rate: 0
bytes/sec, 0 bits/sec, 0 packets/sec
Average input rate during the last 300 seconds (displayed when the
interface supports traffic statistics collection):
bytes/sec
—Average number of bytes received per second.
bits/sec
—Average number of bits received per second.
packets/sec
—Average number of packets received per second.
Last 300 seconds output rate: 0
bytes/sec, 0 bits/sec, 0 packets/sec
Average output rate over the last 300 seconds (displayed when the
interface supports traffic statistics collection):
• bytes/sec—Average number of bytes sent per second.
• bits/sec—Average number of bits sent per second.
• packets/sec—Average number of packets sent per second.
Input: 0 packets, 0 bytes, 0 drops
Total number and size (in bytes) of incoming packets of the interface
and the number of dropped packets (displayed when the interface
supports traffic statistics collection).
Output: 0 packets, 0 bytes, 0 drops
Total number and size (in bytes) of outgoing packets of the interface
and the number of dropped packets (displayed when the interface
supports traffic statistics collection).
# Display brief information about all loopback interfaces.
<Sysname> display interface loopback brief
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Primary IP Description
Loop1 UP UP(s) -- forLAN1
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