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1. 发明授权

US07684316B2 Multicast fast reroute for network topologies 有权
标题翻译：组播快速重路由用于网络拓扑
公开(公告)号：US07684316B2
公开(公告)日：2010-03-23
申请号：US12069709
申请日：2008-02-12
申请人： Clarence Filsfils , Gregory Shepherd , Apoorva Karan , John M. Zwiebel , Dino Farinacci
发明人： Clarence Filsfils , Gregory Shepherd , Apoorva Karan , John M. Zwiebel , Dino Farinacci
IPC分类号： G06F11/00 , H04L12/26
CPC分类号： H04L45/00 , H04L12/185 , H04L12/1868 , H04L12/1886 , H04L45/16 , H04L45/22 , H04L45/28
摘要： In one embodiment, a method includes receiving a multicast join message at a node having a plurality of interfaces, identifying the interface at which the join message was received, and selecting one or more of the interfaces to transmit the join message based on whether the join message was received on a ring interface. If the join message was received on one of the ring interfaces, the join message is transmitted on another of the interfaces. If the join message was not received on one of the ring interfaces, the join message is transmitted on both of the ring interfaces. The method further includes receiving multicast data and transmitting the multicast data on the interface at which the join message was received.
摘要翻译：在一个实施例中，一种方法包括在具有多个接口的节点处接收多播加入消息，识别接收到加入消息的接口，以及基于该连接是否选择一个或多个接口来发送加入消息在一个环形接口上收到消息。如果在其中一个环形接口上收到加入消息，则在另一个接口上传输加入消息。如果其中一个环接口没有收到加入消息，则在两个环形接口上都会发送加入消息。该方法还包括接收组播数据，并在接收到加入消息的接口上发送组播数据。

2. 发明申请

US20090201803A1 Multicast fast reroute for network topologies 有权
标题翻译：组播快速重路由用于网络拓扑
公开(公告)号：US20090201803A1
公开(公告)日：2009-08-13
申请号：US12069709
申请日：2008-02-12
申请人： Clarence Filsfils , Gregory Shepherd , Apoorva Karan , John M. Zwiebel , Dino Farinacci
发明人： Clarence Filsfils , Gregory Shepherd , Apoorva Karan , John M. Zwiebel , Dino Farinacci
IPC分类号： G06F11/07
CPC分类号： H04L45/00 , H04L12/185 , H04L12/1868 , H04L12/1886 , H04L45/16 , H04L45/22 , H04L45/28
摘要： In one embodiment, a method includes receiving a multicast join message at a node having a plurality of interfaces, identifying the interface at which the join message was received, and selecting one or more of the interfaces to transmit the join message based on whether the join message was received on a ring interface. If the join message was received on one of the ring interfaces, the join message is transmitted on another of the interfaces. If the join message was not received on one of the ring interfaces, the join message is transmitted on both of the ring interfaces. The method further includes receiving multicast data and transmitting the multicast data on the interface at which the join message was received.
摘要翻译：在一个实施例中，一种方法包括在具有多个接口的节点处接收多播加入消息，识别接收到加入消息的接口，以及基于该连接是否选择一个或多个接口来发送加入消息在一个环形接口上收到消息。如果在其中一个环形接口上收到加入消息，则在另一个接口上传输加入消息。如果其中一个环接口没有收到加入消息，则在两个环形接口上都会发送加入消息。该方法还包括接收组播数据，并在接收到加入消息的接口上发送组播数据。

3. 发明授权

US09832115B2 Label-switched packets with device-independent labels 有权
公开(公告)号：US09832115B2
公开(公告)日：2017-11-28
申请号：US14527025
申请日：2014-10-29
申请人： Dezhong Cai , Clarence Filsfils , Simon James Trevor Spraggs
发明人： Dezhong Cai , Clarence Filsfils , Simon James Trevor Spraggs
IPC分类号： H04L12/723 , H04L12/715
CPC分类号： H04L45/50 , H04L45/04
摘要： In one embodiment, a device-independent label is associated with multiple network devices such that the packet switching devices in a network will forward a packet based on the device-independent label to one of these multiple network devices. In one embodiment, these device-independent labels include, but are not limited to, domain-identifying labels and forwarding-punt labels. In one embodiment, a domain-identifying label is defined as a label that identifies a plurality of network nodes without identifying a single particular network node, single particular interface, nor single particular link. In one embodiment, a first-domain forwarding-punt label is placed at the top of the label stack to identify to forward the label-switched packet to any one of a plurality of designated forwarding nodes corresponding to the first-domain forwarding-punt label (e.g., for sending to a packet switching device which will have forwarding information for the second domain-identifying label).

4. 发明授权

US09634924B2 Server-layer shared link risk group analysis to identify potential client-layer network connectivity loss 有权
公开(公告)号：US09634924B2
公开(公告)日：2017-04-25
申请号：US13792130
申请日：2013-03-10
申请人： Clarence Filsfils , Ornan Alexander Gerstel , Jean-Philippe Vasseur
发明人： Clarence Filsfils , Ornan Alexander Gerstel , Jean-Philippe Vasseur
IPC分类号： G06F15/173 , H04L12/707 , H04L12/709
CPC分类号： H04L45/22 , H04L45/245 , Y02D50/30
摘要： In one embodiment, a particular device within a client-layer network maintains client-layer topology information including server-layer Shared Risk Link Group (SRLG) information of server-layer devices and links in a server-layer network associated with client-layer links and client-layer nodes in the client-layer network. A determination is made to discover if there is an alternative client-layer path to an established client-layer path between a first packet switching device and a second packet switching device if all server-layer resources of any particular server-layer SRLG of a plurality of total server-layer SRLGs associated with the established client-layer path become unavailable. In one embodiment, the plurality of total server-layer SRLGs includes: an SRLG of a same optical node, an SRLG of a same optical fiber, an SRLG of co-located plurality of optical nodes, and/or an SRLG of co-located plurality of optical fibers.

5. 发明授权

US09548959B2 Address resolution suppression for data center interconnect 有权
标题翻译：数据中心互连的地址分辨率抑制
公开(公告)号：US09548959B2
公开(公告)日：2017-01-17
申请号：US13428436
申请日：2012-03-23
申请人： Sami Boutros , Samer Salam , Ali Sajassi , Clarence Filsfils
发明人： Sami Boutros , Samer Salam , Ali Sajassi , Clarence Filsfils
IPC分类号： G06F15/173 , H04L29/12
CPC分类号： H04L61/103 , H04L61/6009
摘要： An example method is provided that includes determining whether an address resolution protocol reply from a local machine has been received at an edge node; updating a local cache based on the reply from the local machine; and sending the reply to a plurality of edge nodes through a data plane of a data center interconnect. In more specific implementations, the method can include determining whether an address resolution protocol request has been received from the local machine. The method could also include updating a local machine cache based on the request. In certain implementations, the method can include determining whether the request is targeting the local machine; and dropping the request if the request is targeting the local machine. The method could also include sending the request through the data center interconnect if the request is not targeting the local machine.
摘要翻译：提供了一种示例性方法，其包括确定在边缘节点处是否已经接收到来自本地机器的地址解析协议应答; 根据本地机器的回复更新本地缓存; 并通过数据中心互连的数据平面将答复发送到多个边缘节点。在更具体的实现中，该方法可以包括确定是否已经从本地机器接收到地址解析协议请求。该方法还可以包括基于该请求更新本地机器缓存。在某些实现中，该方法可以包括确定请求是否针对本地机器; 如果请求针对本地机器，则删除该请求。该方法还可以包括如果请求不针对本地机器，则通过数据中心互连发送请求。

6. 发明授权

US09143431B2 Hiding a service node in a network from a network routing topology 有权
标题翻译：从网络路由拓扑中隐藏网络中的服务节点
公开(公告)号：US09143431B2
公开(公告)日：2015-09-22
申请号：US12981444
申请日：2010-12-29
申请人： Pradosh Mohapatra , Stefano B. Previdi , Clarence Filsfils , David Ward
发明人： Pradosh Mohapatra , Stefano B. Previdi , Clarence Filsfils , David Ward
IPC分类号： H04L12/28 , H04L12/751
CPC分类号： H04L45/025
摘要： Hiding a service node in a network from a network topology is provided. In one embodiment, for example, an apparatus for hiding a service node in a network from a network topology, the apparatus comprising: a network interface; a processor; and one or more stored sequences of instructions which, when executed by the processor, cause the processor to perform: discovering a service node in a data network in accordance with a link-state protocol wherein the service node provides a network topology dependent service other than packet forwarding; establishing a link-state adjacency with the service node and one or more packet forwarding nodes in accordance with the link-state protocol; receiving a link-state advertisement; in response to identifying the link-state advertisement as an originating link-state advertisement sent from the service node, suppressing flooding of the received link-state advertisement to the one or more packet forwarding nodes.
摘要翻译：提供了从网络拓扑中隐藏网络中的服务节点。在一个实施例中，例如，一种用于从网络拓扑中隐藏网络中的服务节点的装置，所述装置包括：网络接口; 处理器以及一个或多个存储的指令序列，当由所述处理器执行时，所述指令序列使所述处理器执行：根据链路状态协议在数据网络中发现服务节点，其中所述服务节点提供除分组转发; 根据链路状态协议与服务节点和一个或多个分组转发节点建立链路状态邻接; 接收链接状态广告; 响应于将所述链路状态广告识别为从所述服务节点发送的始发链路状态广告，抑制所接收的链路状态广告对所述一个或多个分组转发节点的洪泛。

7. 发明授权

US09118541B2 Interior gateway protocol summarization preserving internet protocol reachability information 有权
标题翻译：内部网关协议汇总，保留互联网协议可达性信息
公开(公告)号：US09118541B2
公开(公告)日：2015-08-25
申请号：US13557084
申请日：2012-07-24
申请人： George L. Swallow , Clarence Filsfils , James Neil Guichard
发明人： George L. Swallow , Clarence Filsfils , James Neil Guichard
IPC分类号： H04L12/28 , H04L12/715 , H04L12/751
CPC分类号： H04L45/04 , H04L45/02
摘要： In one example embodiment, a system and method is illustrated that includes receiving connectivity data for at least one network device, the connectivity data describing a connection to the at least one network device within an area. The system and method further includes processing the connectivity data to obtain a routing update for distribution to another network device outside the area. Additionally, the system and method includes a routing summary in the routing update, the routing summary including an address prefix. Further, the system and method includes reachability information in the routing update, the reachability information including an address for the at least one network device.
摘要翻译：在一个示例实施例中，示出了包括接收至少一个网络设备的连接数据的系统和方法，所述连接性数据描述与区域内的至少一个网络设备的连接。该系统和方法还包括处理连通性数据以获得路由更新以分发给该区域外的另一网络设备。此外，系统和方法包括路由更新中的路由摘要，路由摘要包括地址前缀。此外，系统和方法包括路由更新中的可达性信息，可达性信息包括用于至少一个网络设备的地址。

8. 发明申请

US20150200843A1 Packet Labels For Identifying Synchronization Groups of Packets 审中-公开
标题翻译：用于标识数据包同步组的数据包标签
公开(公告)号：US20150200843A1
公开(公告)日：2015-07-16
申请号：US14155465
申请日：2014-01-15
申请人： Daniel C. Frost , Clarence Filsfils , Simon James Trevor Spraggs , Stewart Frederick Bryant
发明人： Daniel C. Frost , Clarence Filsfils , Simon James Trevor Spraggs , Stewart Frederick Bryant
IPC分类号： H04L12/723 , H04L12/803 , H04L12/707
CPC分类号： H04L45/50 , H04L45/24 , H04L63/0272
摘要： In one embodiment, packet labels are used to identify synchronization groups of packets, such as for, but not limited to, performing processing of packets based on their corresponding synchronization group, as the synchronization label of a packet may define a current characteristic of the packet stream which is taken into account performing processing related to the packet. A plurality of synchronization groups of packets are generated and sent, by a first packet switching device, to a second packet switching device, with each particular packet of the plurality of synchronization groups of packets including a same synchronization label in a label stack of said particular packet that is different than a synchronization label used with another of the plurality of synchronization groups of packets, and with each synchronization group of the plurality of synchronization groups of packets including a plurality of packets.
摘要翻译：在一个实施例中，分组标签用于标识分组的同步组，例如用于但不限于基于其对应的同步组来执行分组的处理，因为分组的同步标签可以定义分组的当前特性考虑到与分组相关的处理的流。由第一分组交换设备产生并发送多个分组的同步组，并发送给第二分组交换设备，其中分组的多个同步组中的每个特定分组在所述特定的标签栈中包括相同的同步标签分组不同于与分组的多个同步组中的另一个同时使用的同步标签，并且与分组的多个同步组的每个同步组包括多个分组。

9. 发明申请

US20140211794A1 Signaling Using a Time-to-Live (TTL) Field of a Packet 审中-公开
标题翻译：使用分组的生存时间（TTL）字段进行信令
公开(公告)号：US20140211794A1
公开(公告)日：2014-07-31
申请号：US13756490
申请日：2013-01-31
申请人： Daniel C. Frost , Stewart Frederick Bryant , Clarence Filsfils
发明人： Daniel C. Frost , Stewart Frederick Bryant , Clarence Filsfils
IPC分类号： H04L12/56
CPC分类号： H04L45/20 , H04L47/286
摘要： In one embodiment, a Time-to-Live (TTL) field of a packet is used to signal information (other than normal other than a life span of the packet or distance information relative to the network node). The packet is sent through a network, which typically includes traversing one or more intermediate nodes resulting in a modification of its TTL field (e.g., each node reduces the TTL value). After receiving the packet, a network node interprets the current value of the TTL field to identify the particular information encoded in the TTL field. Typically the current value of the TTL field is compared to a range of possible values to accommodate different TTL reductions due to different paths through a network. Signaling using the TTL value may be advantageous in networks that perform Equal-Cost-Multi-Path (ECMP) routing as the TTL value does not effect this routing.
摘要翻译：在一个实施例中，分组的生存时间（TTL）字段被用于信号（除了分组的寿命以外的正常信息或相对于网络节点的距离信息）。该分组通过网络发送，该网络通常包括遍历一个或多个中间节点，导致其TTL字段的修改（例如，每个节点减少TTL值）。收到数据包后，网络节点解释TTL字段的当前值，以识别TTL字段中编码的特定信息。通常，将TTL字段的当前值与可能值的范围进行比较，以适应由于通过网络的不同路径而导致的不同TTL减少。使用TTL值的信令在执行等成本多路径（ECMP）路由的网络中可能是有利的，因为TTL值不影响该路由。

10. 发明授权

US08738752B2 Local placement of large flows to assist load-balancing 有权
标题翻译：本地放置大流量以协助负载均衡
公开(公告)号：US08738752B2
公开(公告)日：2014-05-27
申请号：US12011925
申请日：2008-01-30
申请人： Anna Charny , David Tsiang , Mohammed Ismael Tatar , John Bettink , David Getchell , Clarence Filsfils
发明人： Anna Charny , David Tsiang , Mohammed Ismael Tatar , John Bettink , David Getchell , Clarence Filsfils
IPC分类号： G06F15/173 , G06F15/16 , H04L12/56
CPC分类号： H04L47/10 , H04L45/30 , H04L47/125 , H04L47/20
摘要： In one embodiment, an apparatus generally comprises one or more input interfaces for receiving a plurality of flows, a plurality of output interfaces, and a processor operable to identify large flows and select one of the output interfaces for each of the large flows to load-balance the large flows over the output interfaces. The apparatus further includes memory for storing a list of the large flows, a pinning mechanism for pinning the large flows to the selected interfaces, and a load-balance mechanism for selecting one of the output interfaces for each of the remaining flows. A method for local placement of large flows to assist in load-balancing is also disclosed.
摘要翻译：在一个实施例中，装置通常包括用于接收多个流的一个或多个输入接口，多个输出接口和可操作以识别大流量并且为每个大流量选择一个输出接口的处理器，平衡输出接口上的大流量。该装置还包括用于存储大流的列表的存储器，用于将大流锁定到所选接口的钉扎机构，以及用于为每个剩余流选择一个输出接口的负载平衡机构。还公开了用于局部放置大流量以辅助负载平衡的方法。

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