>>180
http://linuxjm.sourceforge.jp/html/LDP_man-pages/man7/netdevice.7.html
> IFF_RUNNING リソースが割り当て済み。

http://www.mjmwired.net/kernel/Documentation/networking/operstates.txt
> ifinfomsg::if_flags & IFF_RUNNING:
> Interface is in RFC2863 operational state UP or UNKNOWN. This is for
> backward compatibility, routing daemons, dhcp clients can use this
> flag to determine whether they should use the interface.