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公开(公告)号：US06937576B1
公开(公告)日：2005-08-30
申请号：US09690619
申请日：2000-10-17
CPC分类号： H04L12/4641 , H04L12/462 , H04L12/4691 , H04L12/4695 , H04L45/02 , H04L45/48
摘要： A multiple instance spanning tree protocol (MI-STP) creates a plurality of active topologies (i.e., loop-free paths) within a computer network. These active topologies may be established through the exchange and processing of multiple instance spanning tree bridge protocol data unit messages (MI-STP BPDUs) by the intermediate network devices within the network. The active topologies are preferably created independently of any virtual local area network (VLAN) designations defined within the network. Once the active topologies are defined, each VLAN designation is then mapped to a single active topology, although multiple VLAN designations are preferably mapped to the same active topology to provide load balancing.
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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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24.发明授权Methods and apparatus for implementing a high availability fibre channel switch 有权实现高可用性光纤通道切换的方法和装置公开(公告)号：US07293105B2
公开(公告)日：2007-11-06
申请号：US10026311
申请日：2001-12-21
IPC分类号： G06F15/173
CPC分类号： G06F11/2097 , G06F11/1675 , G06F11/2038 , H04L29/06 , H04L67/1095 , H04L67/1097 , H04L67/2852 , H04L69/329
摘要： High availability for a fibre channel switch in a storage area network can be implemented using redundant supervisors. An active supervisor can identify high availability characteristics associated with a message and determine whether the message should be mirrored onto a redundant supervisor, logged, and/or made persistent. Messages can be logged in a pending transaction buffer and stored using persistent storage services. Mirroring can be performed using synchronization queues that allow messages to be passed asynchronously to a redundant supervisor while maintaining full synchronization between supervisors and causing little delay to operation of the active supervisor.
摘要翻译： 存储区域网络中光纤通道交换机的高可用性可以使用冗余监控器来实现。 活动主管可以识别与消息相关联的高可用性特征，并确定消息是否应该镜像到冗余监控器上，记录和/或持久化。 消息可以记录在待处理的事务缓冲区中，并使用持久存储服务进行存储。 可以使用允许将消息异步传递到冗余管理器的同步队列执行镜像，同时保持主管之间的完全同步，并且对活动主管的操作几乎没有延迟。
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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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