Part of IDC client take advantage of the bandwidth rent form the China Mobile to develop their own client of home broadband or to sublet the bandwidth improperly. Besides the above behaviors of violation

the unreasonable scheduling policy of content resources is also behavior of internetwork abnormal traffi c

would leads to a large amount of back traffi c from source sites passed through by the entrance of CNMet backbone network. A solution of diagnosis and dispose of the internetwork abnormal traffi c based on the DPI technology is put up in this work. This solution has been utilized by one provincial branches of China Mobile successfully and obvious effect has been achieved with the internetwork abnormal traffi c declined by 71.42%

which decreases the economic losses

improves the quality of the entrance of CMNet backbone network and reduce policy risk.