Name

lo − loop network interface

Syntax

pseudo-device loop

Description

The loop 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.

Diagnostics

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 Also

intro(4n), inet(4f)