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2. 发明授权

US06363056B1 Low overhead continuous monitoring of network performance 失效
标题翻译：低开销连续监控网络性能
公开(公告)号：US06363056B1
公开(公告)日：2002-03-26
申请号：US09115438
申请日：1998-07-15
申请人： Mandis Sadr Mohammad Beigi , Raymond Byars Jennings , Dinesh Chandra Verma
发明人： Mandis Sadr Mohammad Beigi , Raymond Byars Jennings , Dinesh Chandra Verma
IPC分类号： H04L1228
CPC分类号： H04L41/12 , H04L41/5003 , H04L41/5038 , H04L43/0852 , H04L43/0864 , H04L43/0876 , H04L43/10 , H04L43/106 , H04L43/12 , H04L43/18 , H04L43/50
摘要： A method, apparatus, article of manufacture and computer product for low-overhead continuous monitoring of network performance in an intranet or Internet topology. Probe packets are sent from ingress access routers where they are received and processed by egress access routers. Probe packets are generated by copying every Nth packet being sent by an ingress access router. In the event an access router does not receive the probe packet, the probe packet is discarded through normal network delivery mechanisms. Network delay is determined by subtracting the time that a probe packet was received with the time stamp enclosed in the probe packet. Round trip time is established by reflecting the probe packet back to the originating access router and computing the round trip time. Bandwidth monitoring is achieved by using the number of probe packets received to estimate the expected amount of network traffic to be received. Fault monitoring is accomplished by comparing the number of probe packets received with the number of actual packets received. When the low overhead mechanisms indicate that network delays or faults exist, a heavy weight monitoring protocol is started between two access routers in question.
摘要翻译：一种用于低内部网连续监控内部网或互联网拓扑中网络性能的方法，装置，制品和计算机产品。探测分组从入口接入路由器发送，在那里它们被出口接入路由器接收和处理。通过复制由入口接入路由器发送的每第N个分组来生成探测分组。在接入路由器没有收到探测报文的情况下，通过正常的网络传送机制丢弃探测报文。通过用探测包中包含的时间戳减去接收到探测分组的时间来确定网络延迟。通过将探测包反射回始发接入路由器并计算往返时间来建立往返时间。通过使用接收到的探测分组的数量来估计要接收的网络流量的预期量来实现带宽监视。通过比较接收到的探测报文数与接收到的实际报文数量来实现故障监控。当低开销机制指示存在网络延迟或故障时，在所讨论的两个接入路由器之间开始重量级监视协议。

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