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公开(公告)号：US07606177B1
公开(公告)日：2009-10-20
申请号：US10657499
申请日：2003-09-08
申请人： Umesh Mahajan , Ramana Mellacheruvu , Praveen Jain
发明人： Umesh Mahajan , Ramana Mellacheruvu , Praveen Jain
IPC分类号： H04L12/56
CPC分类号： H04L45/48 , H04L12/462 , H04L45/02 , H04L45/18
摘要： A method and apparatus facilitates and enhances the operation of the spanning tree protocol in bridged computer networks. An intermediate network device in accordance with the present invention includes an enhanced spanning tree engine that is configured to perform certain novel functions. First, the enhanced spanning tree engine is configured to identify and block ports at which messages are looped-back to the transmitting port, thereby avoiding the creation of network loops. In second aspect, the enhanced spanning tree engine rapidly transitions certain ports to a forwarding state to prevent associated applications from timing out and shutting down. Rather than moving the ports through blocking, listening and learning states before reaching the forwarding state, selected ports may be transitioned directly to the forwarding state.
摘要翻译： 一种方法和装置促进并增强了桥接计算机网络中的生成树协议的操作。 根据本发明的中间网络设备包括被配置为执行某些新颖功能的增强型生成树引擎。 首先，增强生成树引擎被配置为识别和阻止消息循环回发送端口的端口，从而避免网络环路的创建。 在第二方面，增强生成树引擎将某些端口快速转换到转发状态，以防止相关联的应用程序超时和关闭。 不是在达到转发状态之前通过阻塞，监听和学习状态移动端口，而是可以将所选择的端口直接转换到转发状态。
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22.发明授权公开(公告)号：US07586956B1
公开(公告)日：2009-09-08
申请号：US10982672
申请日：2004-11-05
IPC分类号： H04J3/12
CPC分类号： H04L67/26 , H04L41/0609 , H04L51/066 , H04L51/12 , H04L51/14
摘要： According to the present invention, methods and apparatus are provided for intelligently processing of event notification or callhome messages at a network switch. Alert groups are provided to allow select notification of entities based on the relevance or priority of an event. Destination profiles can be custom configured. A range of message formats are available for compatibility with services such as pager services, email, or XML-based automated parsing applications.
摘要翻译： 根据本发明，提供了用于在网络交换机处智能处理事件通知或呼叫信息的方法和装置。 提供警报组以允许基于事件的相关性或优先级的实体的选择通知。 目标配置文件可以自定义配置。 一系列消息格式可用于与诸如寻呼机服务，电子邮件或基于XML的自动解析应用程序之类的服务兼容。
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公开(公告)号：US07801061B2
公开(公告)日：2010-09-21
申请号：US11329863
申请日：2006-01-10
IPC分类号： H04L12/28
CPC分类号： H04L12/4625 , H04L45/18 , H04L45/563
摘要： Disclosed are methods and apparatus for restarting a first network device having a plurality of ports for receiving and transmitting layer 2 data. The first network device belongs to a network of network devices. When a restart of at least a portion of the first network device is imminent whereby the restarting network device portion can no longer alter a spanning tree protocol (STP) state of one or more of the ports and such ports that remain in a fixed state during the restart are referred to as restarting ports, a current state (such as forwarding) of each restarting port is maintained during the restart under predefined conditions. During the restart, each of the restarting ports of the restarting network device portion cooperate with its peer port of a second non-restarting network device that is a neighbor of the first network device so as to prevent layer 2 loops in the network.
摘要翻译： 公开了用于重新启动具有用于接收和发送第二层数据的多个端口的第一网络设备的方法和装置。 第一个网络设备属于网络设备网络。 当第一网络设备的至少一部分的重新启动即将来临时，由此重新启动的网络设备部分不再可以改变一个或多个端口和这些端口的生成树协议（STP）状态，这些端口和这些端口在该固定状态期间保持在固定状态 重新启动被称为重新启动端口，在预定义条件下重新启动期间维护每个重新启动端口的当前状态（例如转发）。 在重新启动期间，重新启动网络设备部分的每个重新启动端口与作为第一网络设备的邻居的第二非重新启动网络设备的对等端口协作，以防止网络中的第二层环路。
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公开(公告)号：US07649844B2
公开(公告)日：2010-01-19
申请号：US11027252
申请日：2004-12-29
申请人： Rajeev Bector , Sachin Jain , Ramana Mellacheruvu , Umesh Mahajan
发明人： Rajeev Bector , Sachin Jain , Ramana Mellacheruvu , Umesh Mahajan
IPC分类号： H04L1/00
CPC分类号： H04L49/254 , H04L1/16 , H04L49/3045 , H04L49/357
摘要： Methods and apparatus are provided for improving fiber channel packet delivery. Techniques are provided for the in-order delivery of packets by blocking incoming packets associated with a port channel change at a fiber channel switch and sending flush messages onto links associated with a port channel change. Upon receiving acknowledgments for the flush messages, incoming packets are unblocked.
摘要翻译： 提供了用于改善光纤通道分组传送的方法和装置。 通过阻止与光纤信道交换机上的端口信道改变相关联的输入分组，并且将冲突消息发送到与端口信道改变相关联的链路上，提供了用于按顺序传送分组的技术。 在接收到刷新消息的确认后，传入的数据包被解除阻塞。
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公开(公告)号：US20070159988A1
公开(公告)日：2007-07-12
申请号：US11329863
申请日：2006-01-10
IPC分类号： H04L12/28
CPC分类号： H04L12/4625 , H04L45/18 , H04L45/563
摘要： Disclosed are methods and apparatus for restarting a first network device having a plurality of ports for receiving and transmitting layer 2 data is disclosed. The first network device belongs to a network of network devices. When a restart of at least a portion of the first network device is imminent whereby the restarting network device portion can no longer alter a spanning tree protocol (STP) state of one or more of the ports and such ports that remain in a fixed state during the restart are referred to as restarting ports, a current state (such as forwarding) of each restarting port is maintained during the restart under predefined conditions. During the restart, each of the restarting ports of the restarting network device portion cooperate with its peer port of a second non-restarting network device that is a neighbor of the first network device so as to prevent layer 2 loops in the network.
摘要翻译： 公开了用于重新启动具有用于接收和发送第二层数据的多个端口的第一网络设备的方法和装置。 第一个网络设备属于网络设备网络。 当第一网络设备的至少一部分的重新启动即将来临时，由此重新启动的网络设备部分不再可以改变一个或多个端口和这些端口的生成树协议（STP）状态，这些端口和这些端口在该固定状态期间保持在固定状态 重新启动被称为重新启动端口，在预定义条件下重新启动期间维护每个重新启动端口的当前状态（例如转发）。 在重新启动期间，重新启动网络设备部分的每个重新启动端口与作为第一网络设备的邻居的第二非重新启动网络设备的对等端口协作，以防止网络中的第二层环路。
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公开(公告)号：US20070159987A1
公开(公告)日：2007-07-12
申请号：US11329681
申请日：2006-01-10
IPC分类号： H04L12/28
摘要： Disclosed are methods and apparatus for restarting a first network device having a plurality of ports for receiving and transmitting layer 2 data is disclosed. The first network device belongs to a network of network devices. When a restart of at least a portion of the first network device is imminent whereby STP is no longer functioning for the first network device during the restart and can no longer alter a spanning tree protocol (STP) state of one or more of the ports and such ports that remain in a fixed state during the restart are referred to as restarting ports, a current state (such as forwarding) of each restarting port is maintained during the restart under predefined conditions. During the restart, each of the restarting ports of the restarting network device portion cooperate with its peer port of a second non-restarting network device that is a neighbor of the first network device so as to prevent layer 2 loops in the network.
摘要翻译： 公开了用于重新启动具有用于接收和发送第二层数据的多个端口的第一网络设备的方法和装置。 第一个网络设备属于网络设备网络。 当第一网络设备的至少一部分的重新启动迫在眉睫，由此在重新启动期间STP不再对第一网络设备起作用，并且不能再改变一个或多个端口的生成树协议（STP）状态，并且 在重新启动期间保持在固定状态的端口被称为重新启动端口，在预定义条件下在重新启动期间维护每个重新启动端口的当前状态（例如转发）。 在重新启动期间，重新启动网络设备部分的每个重新启动端口与作为第一网络设备的邻居的第二非重新启动网络设备的对等端口协作，以防止网络中的第二层环路。
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公开(公告)号：US06785274B2
公开(公告)日：2004-08-31
申请号：US09167682
申请日：1998-10-07
IPC分类号： H04L1228
CPC分类号： H04L12/4641 , H04L12/467
摘要： Efficient switched network multicasting techniques are provided. Incoming multicast packets are processed by a central forwarding engine (CFE) in a network switch to generate forwarding indices used to make forwarding decisions for the packets based upon whether the packets are special multicast control packets or data packets. Forwarding of the special multicast control packets is determined by the switch's network management processor (NMP), while data packets are forwarded based upon conventional bridge forwarding techniques.
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公开(公告)号：US20080089247A1
公开(公告)日：2008-04-17
申请号：US11582194
申请日：2006-10-16
申请人： Sanjay Sane , Lawrence Kreeger , Thomas Edsall , Elango Ganesan , Soei-Shin Hang , Ramana Mellacheruvu
发明人： Sanjay Sane , Lawrence Kreeger , Thomas Edsall , Elango Ganesan , Soei-Shin Hang , Ramana Mellacheruvu
IPC分类号： H04L12/28
CPC分类号： H04L12/462 , H04L45/00 , H04L45/245 , H04L45/48 , H04L45/586 , H04L47/125 , H04L49/351 , H04L49/70
摘要： A solution is provided wherein the interfaces between multiple chassis (e.g., edge switches) in a network of layer 2 devices and a spanning tree device are treated as a single emulated switch. This emulated switch effectively enables two different views to the two different sides. Thus, frames from the network of layer 2 switches destined to any port of the emulated switch may take any of the links (through any of the physical switches), thereby enabling effective load-balancing for frames traveling from the layer 2 network side into the spanning tree device. Meanwhile the spanning tree device does not recognize an illegal loop in its connection to two different edge switches as it views the two links as a single logical EtherChannel.
摘要翻译： 提供了一种解决方案，其中层2设备的网络中的多个机箱（例如，边缘交换机）与生成树设备之间的接口被视为单个仿真开关。 该模拟开关有效地实现了两个不同的视图。 因此，去往模拟交换机的任何端口的第二层交换机的网络的帧可以采用任何链路（通过任何物理交换机），从而使得从第2层网络侧行进到帧的帧能够进行有效的负载平衡 生成树设备。 同时，生成树设备在将两个链路视为单个逻辑以太通道时，不识别其连接到两个不同边缘交换机的非法回路。
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29.发明授权Preventing transient loops in broadcast/multicast trees during distribution of link state information 有权在分发链路状态信息期间防止广播/多播树中的瞬态环路公开(公告)号：US07817580B2
公开(公告)日：2010-10-19
申请号：US11378990
申请日：2006-03-17
申请人： Sachin Jain , Ramana Mellacheruvu , Sanjay Sane
发明人： Sachin Jain , Ramana Mellacheruvu , Sanjay Sane
IPC分类号： H04L12/28
摘要： According to the present invention, methods and apparatus are provided to improve the link state routing protocol (LSRP) to prevent transient loops during topology changes. Broadcast and shared multicast traffic may be dropped on particular ports upon detecting link state change until neighboring nodes have computed routes using updated link state information. An acknowledgment is sent upon receiving a link state record. Sync and sync-ack packets are used to determine when link state information is synchronized with that of peer nodes.
摘要翻译： 根据本发明，提供了用于改善链路状态路由协议（LSRP）以防止拓扑变化期间的瞬时环路的方法和装置。 在检测到链路状态改变之后，广播和共享多播流量可能被丢弃在特定端口上，直到相邻节点使用更新的链路状态信息来计算路由。 在收到链接状态记录时发送确认。 同步和同步数据包用于确定链路状态信息与对等节点的链路状态信息是否同步。
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30.发明申请Preventing transient loops in broadcast/multicast trees during distribution of link state information 有权在分发链路状态信息期间防止广播/多播树中的瞬态环路公开(公告)号：US20070127396A1
公开(公告)日：2007-06-07
申请号：US11378990
申请日：2006-03-17
申请人： Sachin Jain , Ramana Mellacheruvu , Sanjay Sane
发明人： Sachin Jain , Ramana Mellacheruvu , Sanjay Sane
摘要： According to the present invention, methods and apparatus are provided to improve the link state routing protocol (LSRP) to prevent transient loops during topology changes. Broadcast and shared multicast traffic may be dropped on particular ports upon detecting link state change until neighboring nodes have computed routes using updated link state information. An acknowledgment is sent upon receiving a link state record. Sync and sync-ack packets are used to determine when link state information is synchronized with that of peer nodes.
摘要翻译： 根据本发明，提供了用于改善链路状态路由协议（LSRP）以防止拓扑变化期间的瞬时环路的方法和装置。 在检测到链路状态改变之后，广播和共享多播流量可能被丢弃在特定端口上，直到相邻节点使用更新的链路状态信息来计算路由。 在收到链接状态记录时发送确认。 同步和同步数据包用于确定链路状态信息与对等节点的链路状态信息是否同步。
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