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1. 发明授权

US06735201B1 Efficient network multicast switching apparatus and methods 有权
公开(公告)号：US06735201B1
公开(公告)日：2004-05-11
申请号：US10238422
申请日：2002-09-10
申请人： Umesh Mahajan , Ramana Mellacheruvu , Thomas J. Edsall , Raymond Kloth
发明人： Umesh Mahajan , Ramana Mellacheruvu , Thomas J. Edsall , Raymond Kloth
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.

2. 发明授权

US06804236B1 Efficient network multicast switching apparatus and methods 有权
标题翻译：高效网络组播切换设备及方法
公开(公告)号：US06804236B1
公开(公告)日：2004-10-12
申请号：US10266043
申请日：2002-10-07
申请人： Umesh Mahajan , Ramana Mellacheruvu , Thomas J. Edsall , Raymond Kloth
发明人： Umesh Mahajan , Ramana Mellacheruvu , Thomas J. Edsall , Raymond Kloth
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.
摘要翻译：提供高效的交换网络组播技术。来自组播数据包由网络交换机中的中央转发引擎（CFE）进行处理，以生成用于根据分组是特殊组播控制分组还是数据分组对分组进行转发决定的转发索引。特殊组播控制包的转发由交换机的网络管理处理器（NMP）决定，而数据包则根据传统的桥接转发技术进行转发。

3. 发明授权

US06785274B2 Efficient network multicast switching apparatus and methods 有权
公开(公告)号：US06785274B2
公开(公告)日：2004-08-31
申请号：US09167682
申请日：1998-10-07
申请人： Umesh Mahajan , Ramana Mellacheruvu , Thomas J. Edsall , Raymond Kloth
发明人： Umesh Mahajan , Ramana Mellacheruvu , Thomas J. Edsall , Raymond Kloth
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.

4. 发明授权

US08225134B2 Logical partitioning of a physical device 有权
标题翻译：物理设备的逻辑分区
公开(公告)号：US08225134B2
公开(公告)日：2012-07-17
申请号：US11697612
申请日：2007-04-06
申请人： Ronak Desai , Ramana Mellacheruvu , Dino Farinacci , Amitkumar Patel , Umesh Mahajan
发明人： Ronak Desai , Ramana Mellacheruvu , Dino Farinacci , Amitkumar Patel , Umesh Mahajan
IPC分类号： G06F11/00
CPC分类号： H04L41/0654 , G06F11/1482 , G06F2201/815 , H04L69/32 , H04L69/40
摘要： In one embodiment, an indication of a fault condition is received relating to a first service running on a physical device in a computer network. The first service is associated with a first virtual device context defined on the physical device. Then, the first service is disabled without affecting operation of a second service on the physical device. The second service is associated with a second virtual device context defined on the physical device. In another embodiment, a first virtual device context is created on a physical device in a computer network. Then, a second virtual device context is created on the physical device. The first virtual device context may then be managed independently of the second virtual device context such that resources assigned to a virtual device context are managed without affecting management of another virtual device context.
摘要翻译：在一个实施例中，接收与在计算机网络中的物理设备上运行的第一服务有关的故障状况的指示。第一服务与在物理设备上定义的第一虚拟设备上下文相关联。然后，第一服务被禁用，而不影响物理设备上的第二服务的操作。第二服务与在物理设备上定义的第二虚拟设备上下文相关联。在另一个实施例中，在计算机网络中的物理设备上创建第一虚拟设备上下文。然后，在物理设备上创建第二虚拟设备上下文。然后可以独立于第二虚拟设备上下文管理第一虚拟设备上下文，使得分配给虚拟设备上下文的资源被管理，而不影响另一虚拟设备上下文的管理。

5. 发明申请

US20060153186A1 In-order fibre channel packet delivery 有权
标题翻译：按顺序光纤通道数据包传送
公开(公告)号：US20060153186A1
公开(公告)日：2006-07-13
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： H04L12/56
CPC分类号： H04L49/254 , H04L1/16 , H04L49/3045 , H04L49/357
摘要： Methods and apparatus are provided for improving fibre 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 fibre 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。

6. 发明申请

US20120278458A1 Logical Partitioning Of A Physical Device 有权
标题翻译：物理设备的逻辑分区
公开(公告)号：US20120278458A1
公开(公告)日：2012-11-01
申请号：US13543671
申请日：2012-07-06
申请人： Ronak Desai , Ramana Mellacheruvu , Dino Farinacci , Amitkumar Patel , Umesh Mahajan
发明人： Ronak Desai , Ramana Mellacheruvu , Dino Farinacci , Amitkumar Patel , Umesh Mahajan
IPC分类号： G06F15/177
CPC分类号： H04L41/0654 , G06F11/1482 , G06F2201/815 , H04L69/32 , H04L69/40
摘要： In one embodiment, an indication of a fault condition is received relating to a first service running on a physical device in a computer network. The first service is associated with a first virtual device context defined on the physical device. Then, the first service is disabled without affecting operation of a second service on the physical device. The second service is associated with a second virtual device context defined on the physical device. In another embodiment, a first virtual device context is created on a physical device in a computer network. Then, a second virtual device context is created on the physical device. The first virtual device context may then be managed independently of the second virtual device context such that resources assigned to a virtual device context are managed without affecting management of another virtual device context.
摘要翻译：在一个实施例中，接收与在计算机网络中的物理设备上运行的第一服务有关的故障状况的指示。第一服务与在物理设备上定义的第一虚拟设备上下文相关联。然后，第一服务被禁用，而不影响物理设备上的第二服务的操作。第二服务与在物理设备上定义的第二虚拟设备上下文相关联。在另一个实施例中，在计算机网络中的物理设备上创建第一虚拟设备上下文。然后，在物理设备上创建第二虚拟设备上下文。然后可以独立于第二虚拟设备上下文管理第一虚拟设备上下文，使得分配给虚拟设备上下文的资源被管理，而不影响另一虚拟设备上下文的管理。

7. 发明授权

US07599284B1 Restartable spanning tree for high availability network systems 有权
标题翻译：用于高可用性网络系统的可重新生成树
公开(公告)号：US07599284B1
公开(公告)日：2009-10-06
申请号：US11130286
申请日：2005-05-16
申请人： Marco Di Benedetto , Ramana Mellacheruvu , Umesh Mahajan
发明人： Marco Di Benedetto , Ramana Mellacheruvu , Umesh Mahajan
IPC分类号： G01R31/08 , H04L12/28 , G06F15/177
CPC分类号： H04L45/00 , H04L41/00 , H04L45/48 , H04L45/586
摘要： A method and apparatus for continuing the operation of a spanning tree protocol at a network device despite crashes or failures at that device is disclosed. The network device includes a plurality of line cards having ports for receiving and forwarding messages and a plurality of supervisor cards for processing at least some of those messages. Upon start-up, one of the supervisor cards is designated the active supervisor, while all other supervisor cards are designated standby supervisors. The active supervisor runs the spanning tree protocol (STP). The active supervisor informs the standby supervisors of the states of ports set by the STP. When a crash or failure occurs at the active supervisor, one of the standby supervisors is immediately designated to be the new active supervisor, and the new active supervisor uses the states of ports set by the original STP.
摘要翻译：一种用于在网络设备上继续执行生成树协议的方法和装置，尽管公开了该设备上的故障或故障。网络设备包括具有用于接收和转发消息的端口的多个线路卡和用于处理这些消息中的至少一些的多个管理卡。启动时，其中一个主管卡被指定为主管，而所有其他主管卡都被指定为备用主管。活动主管运行生成树协议（STP）。主动主管向备用主管通知STP设置的端口状态。当主动管理员发生故障或故障时，其中一个备用主管立即被指定为新的主动管理员，新的主管主管使用原始STP设置的端口状态。

8. 发明申请

US20050259597A1 Multiple instance spanning tree protocol 有权
标题翻译：多实例生成树协议
公开(公告)号：US20050259597A1
公开(公告)日：2005-11-24
申请号：US11185057
申请日：2005-07-20
申请人： Marco Benedetto , Ramana Mellacheruvu , Norman Finn , Umesh Mahajan
发明人： Marco Benedetto , Ramana Mellacheruvu , Norman Finn , Umesh Mahajan
IPC分类号： H04L12/28 , H04L12/46 , H04L12/56
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.
摘要翻译：多实例生成树协议（MI-STP）在计算机网络内创建多个活动拓扑（即，无环路径）。这些活动拓扑可以通过网络中的中间网络设备交换和处理多个实例生成树桥协议数据单元消息（MI-STP BPDU）来建立。活动拓扑优选地独立于在网络内定义的任何虚拟局域网（VLAN）指定而创建。一旦定义了活动拓扑，则每个VLAN标识然后映射到单个活动拓扑，尽管多个VLAN名称最好映射到相同的活动拓扑以提供负载平衡。

9. 发明授权

US06628624B1 Value-added features for the spanning tree protocol 有权
公开(公告)号：US06628624B1
公开(公告)日：2003-09-30
申请号：US09208175
申请日：1998-12-09
申请人： Umesh Mahajan , Ramana Mellacheruvu , Praveen Jain
发明人： Umesh Mahajan , Ramana Mellacheruvu , Praveen Jain
IPC分类号： H04L1242
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.

10. 发明授权

US08917732B2 Method of selectively and seamlessly segregating san traffic in I/O consolidated networks 有权
标题翻译：在I / O综合网络中选择性和无缝地隔离SAN流量的方法
公开(公告)号：US08917732B2
公开(公告)日：2014-12-23
申请号：US12551387
申请日：2009-08-31
申请人： Smitha Narayanaswamy , Ganesan Rajagopal , Sanjay Sane , Ramana Mellacheruvu , Umesh Mahajan
发明人： Smitha Narayanaswamy , Ganesan Rajagopal , Sanjay Sane , Ramana Mellacheruvu , Umesh Mahajan
IPC分类号： H04L12/54 , H04L29/08 , H04L29/06
CPC分类号： H04L47/803 , H04L12/46 , H04L12/4645 , H04L63/0236 , H04L63/0876 , H04L67/1097
摘要： Methods and apparatus for segregating traffic are disclosed. In accordance with one embodiment, a traffic splitter identifies a set of links coupled to the traffic splitter, where the set of links includes two or more uplinks, wherein each of the two or more uplinks are implemented in a common physical media. The two or more uplinks include a LAN uplink coupled to a LAN and a SAN uplink coupled to a SAN. The traffic splitter prevents SAN traffic from reaching the LAN via the LAN uplink. In addition, the traffic splitter prevents LAN traffic from reaching the SAN via the SAN uplink.
摘要翻译：公开了用于隔离业务的方法和装置。根据一个实施例，业务分配器识别耦合到业务分路器的一组链路，其中该组链路包括两个或更多个上行链路，其中两个或更多个上行链路中的每一个在公共物理介质中实现。两个或更多个上行链路包括耦合到LAN的LAN上行链路和耦合到SAN的SAN上行链路。流量分配器防止SAN流量通过LAN上行链路到达LAN。此外，流量分配器防止LAN流量通过SAN上行链路到达SAN。

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