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http://rensanning.iteye.com/blog/1545708?page=2#comments

http://www.iteye.com/topic/1124225

http://www.linuxeden.com/plus/view.php?aid=67067

http://www.h3c.com.cn/Service/Document_Center/Routers/Catalog/SR_Router/SR8800/Configure/Operation_Manual/H3C_SR8800_OM%28Release3242_V3.08%29/02/201203/741221_30005_0.htm#_Toc259443787