ifaliases(5) [netbsd man page]

IFALIASES(5)						      BSD File Formats Manual						      IFALIASES(5)

NAME

     ifaliases -- interface aliases file

DESCRIPTION

     The ifaliases file specifies the additional addresses (aliases) that each interface has.  ifaliases is processed by /etc/rc.d/network at sys-
     tem boot time.

     Each line of the file is of the form:
	   address interface [netmask]

     The address is a network address of the alias.  This must be a number, or must be in /etc/hosts, since the nameserver is not running at this
     point.

     The interface is the network interface the alias will be configured on.

     The netmask is the netmask of the alias' network address.	Although this is optional, omitting the netmask is discouraged.  Omission results
     in the use of the classful netmask associated with address.

FILES

     /etc/ifaliases, /etc/rc.d/network

HISTORY

     The ifaliases file appeared in NetBSD 1.2.

BUGS

     ifaliases assumes IPv4, and does not support other protocol families.  Please check rc.conf(5) for alternatives like /etc/ifconfig.xxN.

BSD
								 November 17, 2000							       BSD

LO(4)							   BSD Kernel Interfaces Manual 						     LO(4)

NAME

     lo -- software loopback network interface

SYNOPSIS

     pseudo-device loop

DESCRIPTION

     The loop 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 never be configured first unless no hard-
     ware interfaces exist.

     The loopback interface lo0 is created at boottime, it always exists and cannot be destroyed with ifconfig(8).  Additional loopback interfaces
     can be created by using the ifconfig(8) create command.

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

     inet(4), intro(4), ifconfig(8)

HISTORY

     The lo device appeared in 4.2BSD.

BUGS

     Previous versions of the system enabled the loopback interface automatically, 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.

BSD
								 September 3, 2006							       BSD