http://www.usinglinux.org/doc/translations/zh/Adv-Routing-HOWTO.txt
http://www.fanqiang.com/a1/b1/20010811/0705001103_b.html
http://www.fanqiang.com/a1/b1/20020109/07100042_b.html
http://www.study-area.org/tips/cbq.htm
http://www.study-area.org/tips/cbq_init/cbq_init.htm