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-
- LO(4) UNIX Programmer's Manual LO(4)
-
- NNAAMMEE
- lloo - software loopback network interface
-
- SSYYNNOOPPSSIISS
- ppsseeuuddoo--ddeevviiccee
- lloooopp
-
- DDEESSCCRRIIPPTTIIOONN
- The lloooopp interface is a software loopback mechanism which may be used for
- performance analysis, software testing, and/or local communication. 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 SIOCSIFADDR ioctl(2). The
- loopback interface should be the last interface configured, as protocols
- may use the order of configuration as an indication of priority. The
- loopback should _n_e_v_e_r be configured first unless no hardware interfaces
- exist.
-
- DDIIAAGGNNOOSSTTIICCSS
- lloo%%dd:: ccaann''tt hhaannddllee aaff%%dd.. The interface was handed a message with ad-
- dresses formatted in an unsuitable address family; the packet was
- dropped.
-
- SSEEEE AALLSSOO
- intro(4), inet(4), ns(4)
-
- HHIISSTTOORRYY
- The lloo device appeared in 4.2BSD.
-
- BBUUGGSS
- Previous versions of the system enabled the loopback interface automati-
- cally, using a nonstandard Internet address (127.1). Use of that address
- is now discouraged; a reserved host address for the local network should
- be used instead.
-
- 4.2 Berkeley Distribution June 5, 1993 1
-