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公开(公告)号：US08514854B2
公开(公告)日：2013-08-20
申请号：US12719822
申请日：2010-03-08
申请人： Sheng-Yih Wang , Lok Yan Hui , Sanjay Khanna , Ivy Pei-Shan Hsu
发明人： Sheng-Yih Wang , Lok Yan Hui , Sanjay Khanna , Ivy Pei-Shan Hsu
IPC分类号： H04L12/28
CPC分类号： H04L45/42 , H04L45/586 , H04L45/66
摘要： A solution for virtual router redundancy for server virtualization includes, at a network device configured as a backup router of a virtual router, examining a packet stored in a memory of the network device. Responsive to the examining, the network device determines whether to forward the packet via a network towards a destination or to send the packet via the network to a master router of the virtual router for forwarding of the packet, by the master router, towards the destination.
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公开(公告)号：US20110066753A1
公开(公告)日：2011-03-17
申请号：US12719822
申请日：2010-03-08
申请人： Sheng-Yih Wang , Lok Yan Hui , Sanjay Khanna , Ivy Pei-Shan Hsu
发明人： Sheng-Yih Wang , Lok Yan Hui , Sanjay Khanna , Ivy Pei-Shan Hsu
IPC分类号： G06F15/173
CPC分类号： H04L45/42 , H04L45/586 , H04L45/66
摘要： A solution for virtual router redundancy for server virtualization includes, at a network device configured as a backup router of a virtual router, examining a packet stored in a memory of the network device. Responsive to the examining, the network device determines whether to forward the packet via a network towards a destination or to send the packet via the network to a master router of the virtual router for forwarding of the packet, by the master router, towards the destination.
摘要翻译： 用于服务器虚拟化的虚拟路由器冗余的解决方案包括在配置为虚拟路由器的备份路由器的网络设备上，检查存储在网络设备的存储器中的分组。 响应于检查，网络设备确定是否经由网络朝向目的地转发分组，或者经由网络将分组发送到虚拟路由器的主路由器，以通过主路由器向目的地转发分组 。
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公开(公告)号：US08149839B1
公开(公告)日：2012-04-03
申请号：US12198697
申请日：2008-08-26
申请人： Ivy Pei-Shan Hsu , Deepak Bansal , Lok Yan Hui , Yuen Wong , Vahid Naraghi
发明人： Ivy Pei-Shan Hsu , Deepak Bansal , Lok Yan Hui , Yuen Wong , Vahid Naraghi
IPC分类号： H04L12/28
CPC分类号： H04L45/7453 , H04L45/24 , H04L47/125
摘要： Techniques that offer enhanced diversity in the selection of paths (e.g., ECMP paths) and/or ports from ports associated with trunks for forwarding network data traffic. In one embodiment, a network device uses a rotate function to generate a rotated index (path index) that is used to select a path (e.g., an ECMP) path from multiple paths (e.g., multiple ECMP paths) for forwarding a packet. A network device may also generate a rotated index (trunk index) that is used to select an output port from multiple output ports associated with a trunk for forwarding the packet.
摘要翻译： 在路由选择中提供增强的分集的技术（例如，ECMP路径）和/或从与中继相关联的端口的端口用于转发网络数据业务。 在一个实施例中，网络设备使用旋转函数来生成用于从用于转发分组的多个路径（例如，多个ECMP路径）选择路径（例如，ECMP）路径的旋转索引（路径索引）。 网络设备还可以生成用于从与中继相关联的多个输出端口中选择输出端口以转发分组的旋转索引（中继索引）。
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4.发明申请METHOD FOR PROVIDING SCALABLE MULTICAST SERVICE IN A VIRTUAL PRIVATE LAN SERVICE 有权在虚拟私人网络服务中提供可扩展多播服务的方法公开(公告)号：US20120120952A1
公开(公告)日：2012-05-17
申请号：US13278599
申请日：2011-10-21
申请人： Rajkumar Jalan , Louis Yun , Ivy Pei-Shan Hsu
发明人： Rajkumar Jalan , Louis Yun , Ivy Pei-Shan Hsu
IPC分类号： H04L12/56
CPC分类号： H04L12/4633 , H04L12/185 , H04L12/1886 , H04L12/4641 , H04L49/354 , H04L63/0272
摘要： Multicast capability in a virtual private LAN service (VPLS) is provided in a provider IP/MPLS infrastructure without headend replications by encapsulating a customer data packet to use an established multicast protocol, such as IP multicast. In one example, the customer data packet is encapsulated by an IP header having an IP multicast group address and an Ethernet header. In one implementation, a DNS type mechanism is provided to distribute the IP multicast addresses for VPLS use. Such IP multicast group address can be set aside from an administratively scoped address range. An efficient IP routing algorithm running on the provider's network provides an efficient distribution tree for routing IP-encapsulated customer packet for the VPLS.
摘要翻译： 虚拟专用LAN服务（VPLS）中的组播能力通过封装客户数据包来使用已建立的多播协议（如IP多播），在提供商IP / MPLS架构中提供无前端复制功能。 在一个示例中，客户数据分组由具有IP多播组地址和以太网报头的IP报头来封装。 在一个实现中，提供DNS类型机制来分发用于VPLS使用的IP多播地址。 这样的IP组播组地址可以从管理范围的地址范围来设置。 在提供商网络上运行的高效IP路由算法为VPLS路由IP封装的客户数据包提供了一个有效的分配树。
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5.发明申请SYSTEM AND METHOD FOR PROVIDING NETWORK ROUTE REDUNDANCY ACROSS LAYER 2 DEVICES 有权用于提供网络路由冗余的系统和方法通过层2设备公开(公告)号：US20120008635A1
公开(公告)日：2012-01-12
申请号：US13185885
申请日：2011-07-19
IPC分类号： H04L12/56
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
摘要翻译： 描述了通过第2层设备提供网络路由冗余的系统和方法，例如具有多个交换设备的无环路的二层网络。 虚拟交换机耦合到无环路的二层网络，虚拟交换机具有两个或多个交换机，配置为在主模式和备用模式之间转换，为无环路的二层网络提供冗余支持，交换机通过使用 多个冗余控制分组。 该系统还包括允许冗余控制分组通过第2层网络淹没的装置。 该装置可以包括附加到冗余控制分组的生存时间数据，只有当分组通过被配置为识别在冗余控制分组中使用的协议的设备传送时，该冗余控制分组才递减。
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公开(公告)号：US08024441B2
公开(公告)日：2011-09-20
申请号：US11707697
申请日：2007-02-16
IPC分类号： G06F15/173
CPC分类号： H04L67/1002 , H04L67/1008 , H04L67/1012 , H04L67/1021
摘要： A global server load-balancing (GSLB) switch serves as a proxy to an authoritative DNS and communicates with numerous site switches that are coupled to host servers serving specific applications. The GSLB switch receives from site switches operational information regarding host servers within the site switches neighborhood. When a client program requests a resolution of a host name, the GSLB switch, acting as a proxy of an authoritative DNS, returns one or more ordered IP addresses for the host name. The IP addresses are ordered using metrics that include the information collected from the site switches. In one instance, the GSLB switch places the address that is deemed “best” at the top of the list.
摘要翻译： 全局服务器负载平衡（GSLB）交换机用作授权DNS的代理，并与多个站点交换机进行通信，这些站点交换机与服务于特定应用程序的主机服务器相连。 GSLB交换机从站点交换机接收关于站点交换机附近的主机服务器的操作信息。 当客户端程序请求解析主机名时，作为权威DNS的代理的GSLB交换机返回主机名的一个或多个有序IP地址。 IP地址使用包含从站点交换机收集的信息的度量来排序。 在一个实例中，GSLB开关将地址视为“最佳”位于列表的顶部。
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公开(公告)号：US07254626B1
公开(公告)日：2007-08-07
申请号：US10206580
申请日：2002-07-25
IPC分类号： G06F15/173 , G06F15/16
CPC分类号： H04L67/1002 , H04L67/1008 , H04L67/1012 , H04L67/1021
摘要： A global server load-balancing (GSLB) switch serves as a proxy to an authoritative DNS and communicates with numerous site switches that are coupled to host servers serving specific applications. The GSLB switch receives from site switches operational information regarding host servers within the site switches neighborhood. When a client program requests a resolution of a host name, the GSLB switch, acting as a proxy of an authoritative DNS, returns one or more ordered IP addresses for the host name. The IP addresses are ordered using metrics that include the information collected from the site switches. In one instance, the GSLB switch places the address that is deemed “best” at the top of the list.
摘要翻译： 全局服务器负载平衡（GSLB）交换机用作授权DNS的代理，并与多个站点交换机进行通信，这些站点交换机与服务于特定应用程序的主机服务器相连。 GSLB交换机从站点交换机接收关于站点交换机附近的主机服务器的操作信息。 当客户端程序请求解析主机名时，作为权威DNS的代理的GSLB交换机返回主机名的一个或多个有序IP地址。 IP地址使用包含从站点交换机收集的信息的度量来排序。 在一个实例中，GSLB开关将地址视为“最佳”位于列表的顶部。
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8.发明授权Method for providing scalable multicast service in a virtual private LAN service 有权在虚拟专用LAN服务中提供可扩展多播服务的方法公开(公告)号：US09049047B2
公开(公告)日：2015-06-02
申请号：US13278599
申请日：2011-10-21
申请人： Rajkumar Jalan , Louis Yun , Ivy Pei-Shan Hsu
发明人： Rajkumar Jalan , Louis Yun , Ivy Pei-Shan Hsu
CPC分类号： H04L12/4633 , H04L12/185 , H04L12/1886 , H04L12/4641 , H04L49/354 , H04L63/0272
摘要： Multicast capability in a virtual private LAN service (VPLS) is provided in a provider IP/MPLS infrastructure without headend replications by encapsulating a customer data packet to use an established multicast protocol, such as IP multicast. In one example, the customer data packet is encapsulated by an IP header having an IP multicast group address and an Ethernet header. In one implementation, a DNS type mechanism is provided to distribute the IP multicast addresses for VPLS use. Such IP multicast group address can be set aside from an administratively scoped address range. An efficient IP routing algorithm running on the provider's network provides an efficient distribution tree for routing IP-encapsulated customer packet for the VPLS.
摘要翻译： 虚拟专用LAN服务（VPLS）中的组播能力通过封装客户数据包来使用已建立的多播协议（如IP多播），在提供商IP / MPLS架构中提供无前端复制功能。 在一个示例中，客户数据分组由具有IP多播组地址和以太网报头的IP报头来封装。 在一个实现中，提供DNS类型机制来分发用于VPLS使用的IP多播地址。 这样的IP组播组地址可以从管理范围的地址范围来设置。 在提供商网络上运行的高效IP路由算法为VPLS路由IP封装的客户数据包提供了一个有效的分配树。
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9.发明授权公开(公告)号：US08462668B2
公开(公告)日：2013-06-11
申请号：US10261946
申请日：2002-10-01
IPC分类号： H04L12/28
摘要： The system, method, and article of manufacture of the present invention allows multiple customers connected to a common external network to each implement a layer 2 redundancy protocol, such as the spanning tree protocol, in order to prevent layer 2 loops. Accordingly, a method is presented for providing an independent loop free layer 2 topology between a external network and a customer network comprising tagging control packets originating on the customer network with a unique identifier and tunneling the control packets received from the customer network between a plurality of boundary interface devices at the external network such that the control packets are routed back to the customer network based on the presence of the unique identifier in the control packet. The layer 2 redundancy protocol on the customer network converges based at least in part on the presence of control packets appearing on more than one port on the customer network.
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10.发明授权System and method for providing network route redundancy across layer 2 devices 有权在第2层设备上提供网络路由冗余的系统和方法公开(公告)号：US07558195B1
公开(公告)日：2009-07-07
申请号：US11695458
申请日：2007-04-02
CPC分类号： H04L49/552 , H04L43/0876 , H04L45/00 , H04L45/18 , H04L45/32 , H04L45/48 , H04L45/586 , H04L69/40
摘要： Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
摘要翻译： 描述了通过第2层设备提供网络路由冗余的系统和方法，例如具有多个交换设备的无环路的二层网络。 虚拟交换机耦合到无环路的二层网络，虚拟交换机具有两个或多个交换机，配置为在主模式和备用模式之间转换，为无环路的二层网络提供冗余支持，交换机通过使用 多个冗余控制分组。 该系统还包括允许冗余控制分组通过第2层网络淹没的装置。 该装置可以包括附加到冗余控制分组的生存时间数据，只有当分组通过被配置为识别在冗余控制分组中使用的协议的设备传送时，该冗余控制分组才递减。
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