In IP-based communications network development trends, the demand of Ethernet bandwidth leased by corporate customers is growing rapidly. How to solve the problem of bandwidth capacity is particularly important. From two aspects of FTP / TCP theoretical and the measured current network bandwidth, this paper studies the performance issues of PTN + MSTP hybrid network which carrying Ethernet private line service. Finaly gets the effective scheme, which solve the bandwidth problem of transmission network carrying Ethernet services.%在通信网络IP化发展趋势下,集团客户租用运营商以太网专线带宽的需求增长迅速,运营商如何解决带宽容量问题尤为重要.本文将从"FTP/TCP理论及现网带宽实测案例"两个方面对PTN+MSTP混合组网承载以太网专线业务的性能问题进行分析,总结得出传送网络承载以太网业务时带宽局限的有效解决方案.
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