公开(公告)号：US20190319927A1

公开(公告)日：2019-10-17

申请号：US15952412

申请日：2018-04-13

申请人： Cisco Technology, Inc.

发明人： Tyler Levine ,  Christopher Metz ,  Zhaoxing Li ,  Rohan Dhesikan ,  David D. Ward

IPC分类号： H04L29/06 ,  H04L9/32 ,  H04L29/08

摘要： A system is provided comprising one or more application layer audit proxies arranged to obtain application layer network traffic sent in a network. Each of the application layer audit proxies configured to: receive application layer network traffic sent as part of a communication session between a producer entity and a consumer entity; record information about the application layer network traffic to an audit log in a distributed permissioned database comprising a blockchain of immutable data blocks; and forward the application layer network traffic to the producer entity or to the consumer entity.

公开(公告)号：US09699087B2

公开(公告)日：2017-07-04

申请号：US14229503

申请日：2014-03-28

申请人： Cisco Technology, Inc.

发明人： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Rodolphe Figaro ,  Reshad A. Rahman

IPC分类号： H04L12/803 ,  H04L12/24 ,  H04L12/701 ,  H04L12/723 ,  H04L12/851 ,  H04L12/911

CPC分类号： H04L47/125 ,  H04L41/06 ,  H04L45/00 ,  H04L45/50 ,  H04L47/2408 ,  H04L47/745

摘要： A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.

公开(公告)号：US20170104676A1

公开(公告)日：2017-04-13

申请号：US14878014

申请日：2015-10-08

申请人： Cisco Technology, Inc.

发明人： Keyur Patel ,  Serpil Bayraktar ,  Manish Bhardwaj ,  David D. Ward ,  Arjun Sreekantiah ,  Burjiz Pithawala

IPC分类号： H04L12/721 ,  H04L12/26

CPC分类号： H04L45/70 ,  H04L41/0893 ,  H04L43/50 ,  H04L45/02 ,  H04L45/04 ,  H04L45/123 ,  H04L45/22

摘要： A network includes a route reflector peered with client routers. From a perspective of the route reflector, a best path to the destination address is selected by applying to candidate paths ordered comparison tests that progress from policy tests through one or more additional tests until the best path is selected. A determination is made as to whether the best path was selected based on the policy tests exclusively. If the best path was selected based on the policy tests exclusively, the best path is assigned to each of the client routers. If the best path was not selected based on the policy tests exclusively, from a perspective of each client router, a respective best path is selected by applying to the candidate paths the one or more additional tests, and the respective best paths are assigned to the respective client routers.

公开(公告)号：US20160352654A1

公开(公告)日：2016-12-01

申请号：US15234794

申请日：2016-08-11

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  David D. Ward ,  Stewart F. Bryant ,  Daniel C. Frost ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC分类号： H04L12/931 ,  H04L12/741

CPC分类号： H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

摘要： A method, apparatus, and computer readable medium are disclosed. In one embodiment of the method, a packet and a segment ID stack is received at a first segment routing enabled node. The segment ID stack includes a plurality of segment IDs, one or which is a first area-segment ID that identifies a first area of a subdivided segment routing network. An egress interface of the first segment routing enabled node is selected based on the first area-segment ID. Thereafter, the packet is forwarded via the selected egress interface.

摘要翻译： 公开了一种方法，装置和计算机可读介质。 在该方法的一个实施例中，在第一分段路由启用节点处接收分组和分段ID堆栈。 段ID堆栈包括多个段ID，一个或者是标识分割段路由选择网络的第一区域的第一区域段ID。 基于第一区域段ID选择启用第一段路由的节点的出口接口。 此后，经由选择的出口接口转发分组。

公开(公告)号：US09450829B2

公开(公告)日：2016-09-20

申请号：US14210837

申请日：2014-03-14

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  David D. Ward ,  Stewart F. Bryant ,  Daniel C. Frost ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC分类号： H04L12/723 ,  H04L12/715 ,  H04L12/24 ,  H04L12/721 ,  H04L12/741

CPC分类号： H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

摘要： In one embodiment, a packet and a segment ID stack is received at a node. The segment ID stack includes a plurality of segment IDs, one or which is a first area-segment ID that identifies a first area of a subdivided network. One of a plurality of forwarding tables at the node is selected based on the first area-segment ID. Thereafter, the packet is forwarded based on information contained in the selected forwarding table.

摘要翻译： 在一个实施例中，在节点处接收分组和分段ID堆栈。 片段ID堆叠包括多个片段ID，一个或者是标识细分网络的第一区域的第一区域段ID。 基于第一区域段ID选择节点处的多个转发表之一。 此后，基于所选择的转发表中包含的信息来转发该分组。

公开(公告)号：US20160173373A1

公开(公告)日：2016-06-16

申请号：US14664629

申请日：2015-03-20

申请人： CISCO TECHNOLOGY, INC.

发明人： James N. Guichard ,  Paul Quinn ,  David D. Ward ,  Carlos M. Pignataro

IPC分类号： H04L12/741 ,  H04L29/06 ,  H04W72/04

CPC分类号： H04L47/125 ,  H04L45/306 ,  H04L45/38 ,  H04L45/74 ,  H04L47/2408 ,  H04L47/2441 ,  H04L67/02 ,  H04L67/1023 ,  H04L67/327 ,  H04L69/22 ,  H04W72/0486

摘要： A method for load balancing based on metadata in a network service header. The method includes receiving a packet or frame of a traffic flow, wherein the packet or frame has a payload and the network service header including metadata and service path information for the traffic flow identifying the service path, and the metadata comprises classification information of the packet or frame, extracting, by a service header processor of the load balancer, the classification information of the metadata from the packet or frame, and applying, by a load balancing function of the load balancer, a load balancing policy on the packet or frame based on the classification information of the metadata.

摘要翻译： 一种基于网络服务头部元数据的负载均衡方法。 所述方法包括接收业务流的分组或帧，其中所述分组或帧具有有效载荷，并且所述网络服务报头包括用于标识所述服务路径的业务流的元数据和服务路径信​​息，并且所述元数据包括所述分组的分类信息 或帧，由负载平衡器的服务头处理器从分组或帧中提取元数据的分类信息，并通过负载平衡器的负载平衡功能应用基于分组或帧的负载均衡策略 关于元数据的分类信息。

公开(公告)号：US20140269698A1

公开(公告)日：2014-09-18

申请号：US14210729

申请日：2014-03-14

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Ahmed R. Bashandy ,  David D. Ward ,  Stefano B. Previdi

IPC分类号： H04L12/723

CPC分类号： H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

摘要： A method and apparatus for forwarding packets through a network domain that contains nodes that are label distribution protocol (LDP) enabled and nodes that are segment routing (SR) enabled. In one embodiment, the method may include a network node receiving a packet with a label attached thereto. The node swaps the label with a segment identifier (ID). The node then forwards the packet to an SR node. In another embodiment, the method may include a network node receiving a packet with a segment ID attached thereto. The node swaps the segment ID with a label. The node then forwards the packet to an LDP enabled node.

摘要翻译： 一种用于通过包含启用标签分发协议（LDP）的节点的网络域转发分组的方法和装置，以及启用分段路由（SR）的节点。 在一个实施例中，该方法可以包括接收具有附加到其上的标签的分组的网络节点。 节点用分段标识符（ID）交换标签。 然后节点将数据包转发到SR节点。 在另一个实施例中，该方法可以包括接收具有附加到其上的段ID的分组的网络节点。 节点用标签交换分段ID。 然后节点将数据包转发到启用LDP的节点。

公开(公告)号：US20140211629A1

公开(公告)日：2014-07-31

申请号：US14229503

申请日：2014-03-28

申请人： Cisco Technology, Inc.

发明人： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  Stefano B. Previdi ,  Jean-Philippe Vasseur ,  Rodolphe Figaro ,  Reshad A. Rahman

IPC分类号： H04L12/803

CPC分类号： H04L47/125 ,  H04L41/06 ,  H04L45/00 ,  H04L45/50 ,  H04L47/2408 ,  H04L47/745

摘要： A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.

摘要翻译： 用于以不涉及使用最大成本来指示实体的方式向诸如节点，线路卡和数据链路的实体（例如节点，线路卡和数据链路）广告外部资源（OOR）条件的系统和方法是“超出资源 。“根据该技术，实体的OOR条件在广告消息中包含的一个或多个类型长度值（TLV）对象中通告。 广告消息被洪泛到数据网络上的节点，以通知他们实体的OOR条件。 处理广告消息的头端节点可以使用包含在TLV对象中的信息来确定不包括与OOR条件相关联的实体的新标签交换路径（LSP）的路径。

公开(公告)号：US20220173976A1

公开(公告)日：2022-06-02

申请号：US17673182

申请日：2022-02-16

申请人： Cisco Technology, Inc.

发明人： Ahmed R. Bashandy ,  Clarence Filsfils ,  David D. Ward

IPC分类号： H04L41/12 ,  H04L45/00 ,  H04L45/12 ,  H04L45/50 ,  H04L45/745 ,  H04L45/74 ,  H04L49/60 ,  H04L12/46 ,  H04L47/724

摘要： An apparatus and method is disclosed for segment routing (SR) over label distribution protocol (LDP). In one embodiment, the method includes a node receiving a packet with an attached segment ID. In response, the node may attach a label to the packet. Thereafter, the node may forward the packet with the attached label and segment ID to another node via a label switched path (LSP).

公开(公告)号：US11140133B2

公开(公告)日：2021-10-05

申请号：US15952412

申请日：2018-04-13

申请人： Cisco Technology, Inc.

发明人： Tyler Levine ,  Christopher Metz ,  Zhaoxing Li ,  Rohan Dhesikan ,  David D. Ward

IPC分类号： H04L29/06 ,  H04L9/32 ,  H04L29/08

摘要： A system is provided comprising one or more application layer audit proxies arranged to obtain application layer network traffic sent in a network. Each of the application layer audit proxies configured to: receive application layer network traffic sent as part of a communication session between a producer entity and a consumer entity; record information about the application layer network traffic to an audit log in a distributed permissioned database comprising a blockchain of immutable data blocks; and forward the application layer network traffic to the producer entity or to the consumer entity.