software loopback network interface
interface is a software loopback
mechanism which may be used for performance analysis, software testing, and/or
interface can be created at runtime
command or by setting up a
configuration file for
interface will always exist and cannot
be destroyed using
As with other network interfaces, the loopback interface must have network
addresses assigned for each address family with which it is to be used. These
addresses may be set or changed with the
loopback interface should be the last interface configured, as protocols may
use the order of configuration as an indication of priority. The loopback
be configured first unless no
hardware interfaces exist.
- lo0: can't handle afX.
- The interface was handed a message with addresses formatted in an
unsuitable address family; the packet was dropped.
device appeared in
Previous versions of the system enabled the loopback interface automatically,
using a non-standard Internet address (127.1). Use of that address is now
discouraged; a reserved host address for the local network should be used