| With the development of society and technology, the bandwidth of communication network has become broader and broader. Nowadays backbone network has realized fiber and broadband switching. So access network has become the 'bottle neck'. New HFC have the advantages of access bandwidth, high performance-price ratio, convenient transformation, it is better suited to China's national conditions, and it is likely be popular in domestic.The switch function of Concentrator is needed in the new HFC network. The software of VLAN and multicast is designed in this paper. Then the software is tested on existing experimental network Architecture. It can be proved that the software is successful. |
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