lo(4)lo(4)Namelo - loop network interface
The interface is a software loopback mechanism that can be used for
performance analysis, software testing, and/or local communication.
By default, the loopback interface is accessible at address 127.0.0.1
(nonstandard); this address may be changed with the SIOCSIFADDR ioctl.
lo%d: can't handle af%d
The interface was handed a message with addresses formatted in an
unsuitable address family; the packet was dropped.
See Alsointro(4n), inet(4f)lo(4)