【摘要】 OSPF(open shortest path first)协议的报文刷新机制会产生大量的报文,给网络带来很大的突发流量。为了减少OSPF给网络带来的负载,该文对OSPF的报文刷新机制进行深入的分析,证明了延长OSPF报文刷新间隔不会影响协议行为和性能的结论。据此该文提出了ERR(enhanced randomized refresh)机制。ERR机制采用随机分散OSPF报文的刷新时间和延长OSPF报文刷新间隔的方法,消除了OSPF带来的突发流量和减少了OSPF报文的数量。该文采用VENUS模拟器进行模拟,实验结果显示:ERR机制比标准刷新机制减少了三分之一的报文,同时消除了OSPF刷新报文给网络带来的突发流量。更多还原

【Abstract】 The OSPF (open shortest path first) refresh mechanism can cause periodic bursts of traffic on networks. Analysis of the OSPF refresh mechanism showed that extending the OSPF refresh interval does not change the OSPF behavior and weakens the OSPF performance. A new refresh mechanism, enhanced randomized refresh not only prolongs the OSPF refresh interval but also randomly sends refresh packets during the interval. This mechanism substantially reduces the packets sent by OSPF and avoids the traffic bursts due to the refresh mechanism. Tests on the VENUS simulator show that the number of refresh packets is reduced by one third compared with old refresh mechanism and that all the refresh packets are dispersed during the refresh interval.更多还原