Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

show interfaces loopback

Displays statistics and configuration information about configured loopback interfaces.

show interfaces loopback [ interface-name [ brief ] | detail ]

When used with no option, this command displays a brief status of the loopback interface.

interface-name
The name of a loopback interface, lo or lon, where n ranges from 1 through 99999.
brief
Displays a brief status of a loopback interface.
detail
Displays detailed information and statistics about all loopback interfaces.

Operational mode

Use this command to display information about loopback interfaces.

The following example shows how to display a brief status of a loopback interface.


 vyatta@R1:~$ show interfaces loopback lo2 brief
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface        IP Address                        S/L  Description
---------        ----------                        ---  -----------
lo2              192.2.0.1/24                      u/u 

The following example shows how to display detailed information about a loopback interface.


 vyatta@R1:~$ show interfaces loopback lo2
lo2: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
    link/ether 62:32:92:61:c4:69 brd ff:ff:ff:ff:ff:ff
    inet 192.2.0.1/24 brd 192.2.0.255 scope global lo2
       valid_lft forever preferred_lft forever
    inet6 fe80::6032:92ff:fe61:c469/64 scope link 
       valid_lft forever preferred_lft forever

    RX:  bytes    packets     errors    ignored    overrun      mcast
             0          0          0          0          0          0
    TX:  bytes    packets     errors    dropped    carrier collisions
             0          0          0          0          0          0

The following example shows how to display detailed information about all loopback interfaces.


  vyatta@R1:~$ show interfaces loopback lo
lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet 192.0.0.1/24 brd 192.0.0.255 scope global lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

    RX:  bytes    packets     errors    ignored    overrun      mcast
       1058949       6632          0          0          0          0
    TX:  bytes    packets     errors    dropped    carrier collisions
       1058949       6632          0          0          0          0
lo2: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
    link/ether 62:32:92:61:c4:69 brd ff:ff:ff:ff:ff:ff
    inet 192.2.0.1/24 brd 192.2.0.255 scope global lo2
       valid_lft forever preferred_lft forever
    inet6 fe80::6032:92ff:fe61:c469/64 scope link 
       valid_lft forever preferred_lft forever
...