HP MSR2000/3000/4000 Router Series Interface Command Reference

178
Interface Link Protocol Main IP Description
Loop1 UP UP(s) -- aaaaaaaaaaaaaaaaaaaaaaaaaaa
# Display brief information about all existing loopback interfaces, including the full description of each
loopback interface.
<Sysname> display interface loopback brief description
Brief information on interface(s) under route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Main IP Description
Loop1 UP UP(s) -- aaaaaaaaaaaaaaaaaaaaaaaaaaaaa
# Display information about all loopback interfaces in down state and the causes.
<Sysname> display interface loopback brief down
Brief information on interface(s) under route mode:
Link: ADM - administratively down; Stby - standby
Interface Link Cause
Loop1 ADM Administratively
Table 23 Command output
Field Description
Brief information on interface(s)
under route mode:
Brief information about loopback interfaces.
Link: ADM - administratively down;
Stby - standby
Link attribute of the interface:
• ADM—The interface has been shut down by the network
administrator. To recover its physical layer state, run the undo
shutdown command.
• Stby—The interface is a standby interface.
Protocol: (s) - spoofing
Protocol attribute of the interface.
(s) represents the spoofing flag. If the data link layer protocol of an
interface is up but its link is an on-demand link or not present at all, the
Protocol field displays UP(s). This attribute is typical of interface Null 0,
Inloopback 0, and loopback interfaces.
Interface Interface name.
Link
Physical layer state of the interface:
• UP—The interface is up.
• DOWN—The interface is physically down.
• ADM—The interface has been administratively shut down. To recover
its physical state, run the undo shutdown command.
• Stby—The interface is a standby interface.
Protocol
Data link layer protocol state of the interface, which is always UP(s).
UP(s) means that the data link layer protocol state of the interface is UP
but the link of the interface is an on-demand link or not present at all.
Description
Interface description configured by using the description command. If the
description keyword is not specified in the display interface brief
command, the Description field allows a maximum of 27 characters. If
the description keyword is specified in the display interface brief
command, the field displays the full interface description.