http://defiant.coinet.com/iproute2/
http://www.hyperdyne.co.jp/~oohashi/work/redhat/iproute2/01.shtml
ftp://ftp.infoscience.co.jp/pub/linux/ip-routing/
http://www.linux.or.jp/JF/JFdocs/traffic-control.html
http://ceres.mine.nu/~yukkie/linux/tc.html