09-24-2008
valid_lft forever preferred_lft forever <-- what does this mean?
Just looking at my ethernet interface.. I see this response... what does this mean...?
ipconfig...
lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
What does this mean what is it telling me ??
Thanks all !!
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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