公开(公告)号：US20140280711A1

公开(公告)日：2014-09-18

申请号：US13839764

申请日：2013-03-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Rajiv Asati ,  Ijsbrand Wijnands

IPC: H04L29/08

CPC classification number: H04L67/10 ,  H04L45/16 ,  H04L45/22 ,  H04L45/28 ,  H04L45/48 ,  H04L45/50

Abstract: In one embodiment, a merge process can determine a primary tree among nodes in a communication network, determine a backup tree for a protected segment of the primary tree, the backup tree having at least a portion of overlap with the primary tree, and stitch the backup tree to the primary tree for each node of the portion of overlap such that when a message is transmitted for a group according to the backup tree, each node of the portion of overlap receives a single instance of the message of the group.

Abstract translation: 在一个实施例中，合并过程可以确定通信网络中的节点之间的主树，确定主树的受保护段的备份树，备份树具有与主树重叠的至少一部分，并且将 备份树到重叠部分的每个节点的主树，使得当根据备份树发送用于组的消息时，重叠部分的每个节点接收该组的消息的单个实例。

公开(公告)号：US20140226464A1

公开(公告)日：2014-08-14

申请号：US13764030

申请日：2013-02-11

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar ,  Ijsbrand Wijnands

IPC: H04L12/56

CPC classification number: H04L45/28 ,  H04L45/16 ,  H04L45/22

Abstract: The present disclosure provides for avoiding packet loss and delay that occurs during conventional link switchover by moving link switchover logic from a downstream PORT (Protocol Independent Multicast Over Reliable Transport) routing element to an upstream PORT routing element. An upstream PORT routing element detects the failure of a forwarding interface for a multicast datastream, where the forwarding interface is coupled to a downstream PORT routing element. In response to detecting the failure, the upstream PORT routing element determines a set of candidate interfaces that are also coupled to the downstream PORT routing element. The upstream PORT routing element selects a new interface from the set of candidate interfaces and installs the new interface as a replacement forwarding interface for the multicast datastream.

Abstract translation: 本公开提供了通过将链路切换逻辑从下游端口（可协议传输路由协议无关组播）路由选择元件移动到上游端口路由选择元件来避免在常规链路切换期间发生的分组丢失和延迟。 上游端口路由元件检测组播数据流的转发接口的故障，其中转发接口耦合到下游端口路由元件。 响应于检测到故障，上游端口路由选择单元确定也耦合到下游端口路由选择单元的一组候选接口。 上游端口路由选择单元从候选接口集中选择一个新接口，并将新接口安装为组播数据流的替换转发接口。

公开(公告)号：US20240298180A1

公开(公告)日：2024-09-05

申请号：US18661055

申请日：2024-05-10

Applicant: Cisco Technology, Inc.

Inventor： Stefan Olofsson ,  Ijsbrand Wijnands ,  Hendrikus G. P. Bosch ,  Jeffrey Napper ,  Anubhav Gupta

IPC: H04W12/086 ,  H04L9/40 ,  H04L45/64 ,  H04W12/37

CPC classification number: H04W12/086 ,  H04L63/0272 ,  H04L63/20 ,  H04W12/37 ,  H04L45/64

Abstract: In one embodiment, a router includes one or more processors and one or more computer-readable non-transitory storage media coupled to the one or more processors. The one or more computer-readable non-transitory storage media include instructions that, when executed by the one or more processors, cause the router to perform operations including receiving software-defined networking in a wide area network (SD-WAN) policies from a component of an SD-WAN network. The operations also include establishing a session with a mobile device and receiving information associated with the mobile device in response to establishing the session with the mobile device. The operations further include filtering the SD-WAN policies based on the information associated with the mobile device to generate SD-WAN device-specific policies and communicating the SD-WAN device-specific policies to the mobile device.

公开(公告)号：US20230246967A1

公开(公告)日：2023-08-03

申请号：US18297599

申请日：2023-04-07

Applicant: Cisco Technology, Inc.

Inventor： Ijsbrand Wijnands ,  Neale David Raymond Ranns ,  David Delano Ward ,  David Richard Barach

IPC: H04L47/125 ,  H04L47/70 ,  H04L47/17 ,  H04L45/50

CPC classification number: H04L47/125 ,  H04L47/825 ,  H04L47/17 ,  H04L45/507

Abstract: In one embodiment, an offload platform is an compute platform, adjunct to a router or other packet switching device, that performs packet processing operations including determining an egress forwarding value corresponding to the next-hop node of the packet switching device to which to send an offload-platform processed packet. The offload platform downloads forwarding information from the router, and augments it, such as, but not limited to, representing interfaces of the router as identifiable virtual interface(s) on the offload platform, and including each of one or more next-hop nodes of the router represented as an identifiable virtual adjacency and identifiable tunnel (e.g., identified by the egress forwarding value). In one embodiment, the egress forwarding value is an Multiprotocol Label Switching (MPLS) label or Segment Routing Identifier. The router identifies packets of certain packet flows to send to the adjunct offload platform, rather than processing per its routing information base.

公开(公告)号：US11646906B2

公开(公告)日：2023-05-09

申请号：US17315582

申请日：2021-05-10

Applicant: Cisco Technology, Inc.

Inventor： Ijsbrand Wijnands ,  Gregory J. Shepherd ,  John H. W. Bettink

IPC: H04L12/18 ,  H04L45/74 ,  H04L45/745 ,  H04L45/16 ,  H04L45/00

CPC classification number: H04L12/1886 ,  H04L45/16 ,  H04L45/54 ,  H04L45/745

Abstract: Disclosed is the generation of a bit-indexed forwarding table (BIFT) that can include a plurality of entries, each such entry corresponding to a bit position of a plurality of bit positions, where each such bit position represents an egress network node of a plurality of egress network nodes, and the generating configures the BIFT to be used in forwarding a packet to one or more of the plurality of egress network nodes, based at least in part on a bit string in the packet. The generating includes selecting a bit position of the plurality of bit positions as a selected bit position, creating an entry of the plurality of entries (where the entry corresponds to the selected bit position), identifying a neighbor node associated with the selected bit position, and updating one or more fields of the entry with neighbor information regarding the neighbor node.

公开(公告)号：US11509572B2

公开(公告)日：2022-11-22

申请号：US17038204

申请日：2020-09-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Pascal Thubert ,  Ijsbrand Wijnands ,  Krishnaswamy Ananthamurthy ,  Ramakrishnan Chokkanathapuram Sundaram ,  Stig Ingvar Venaas

IPC: H04L12/28 ,  H04L45/00 ,  H04L45/16 ,  H04L45/741 ,  H04L45/021 ,  H04L45/48

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

公开(公告)号：US11240053B2

公开(公告)日：2022-02-01

申请号：US16654078

申请日：2019-10-16

Applicant: Cisco Technology, Inc.

Inventor： Ijsbrand Wijnands ,  Gregory J. Shepherd ,  Christian J. Martin

IPC: H04L12/18 ,  H04L12/761 ,  H04L12/741

Abstract: Various systems and methods for performing bit indexed explicit replication (BIER). For example, one method involves receiving a membership message that was generated by an egress router, where the membership message comprises information identifying a multicast group, and information identifying a plurality of egress routers. The method identifies at least one bit position in the membership message that is associated with the first egress router, where at least one bit position of the plurality of bit positions is associated with the first egress router. The method also records membership of the first egress router in the multicast group, where the membership is recorded in a bit of a group membership table, and the bit corresponds to the bit position identified in the membership message.

公开(公告)号：US11206148B2

公开(公告)日：2021-12-21

申请号：US16669653

申请日：2019-10-31

Applicant: Cisco Technology, Inc.

Inventor： Ijsbrand Wijnands ,  Gregory J. Shepherd ,  Christian J. Martin

IPC: H04L12/18 ,  H04L12/761 ,  H04L12/741 ,  H04L12/705 ,  H04L12/723

Abstract: Methods, devices and computer readable storage media for performing bit indexed explicit replication (BIER) are disclosed. One embodiment of a method includes obtaining, at an egress node of a network, a bit position assigned to the egress node. This embodiment also includes sending an outgoing advertisement to other nodes in the network, where the outgoing advertisement identifies the egress node and the assigned bit position. The bit position is within a bit mask comprising bits in a plurality of bit positions, and each bit position corresponds to a respective egress node of the network.

公开(公告)号：US20210369309A1

公开(公告)日：2021-12-02

申请号：US17403676

申请日：2021-08-16

Applicant: Cisco Technology Inc.

Inventor： Stefan Olofsson ,  Ijsbrand Wijnands ,  Hendrikus G.P. Bosch ,  Jeffrey Napper ,  Anubhav Gupta

IPC: A61B17/72 ,  A61B17/86 ,  A61B17/92

Abstract: In one embodiment, a router includes one or more processors and one or more computer-readable non-transitory storage media coupled to the one or more processors. The one or more computer-readable non-transitory storage media include instructions that, when executed by the one or more processors, cause the router to perform operations including receiving software-defined networking in a wide area network (SD-WAN) policies from a component of an SD-WAN network. The operations also include establishing a session with a mobile device and receiving information associated with the mobile device in response to establishing the session with the mobile device. The operations further include filtering the SD-WAN policies based on the information associated with the mobile device to generate SD-WAN device-specific policies and communicating the SD-WAN device-specific policies to the mobile device.

公开(公告)号：US20210336811A1

公开(公告)日：2021-10-28

申请号：US16858978

申请日：2020-04-27

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Krishnaswamy Muddenahally Ananthamurthy ,  Jayashree Subramanian

IPC: H04L12/18 ,  H04L12/46 ,  H04L12/761 ,  H04L12/741 ,  H04L12/913 ,  H04L29/06

Abstract: A networking environment includes a first node and a second node configured as Ethernet Virtual Private Networking (EVPN) peers on an EVPN subnet that is coupled to a Layer 3 VPN over a core network. The first node receives a first multicast join request from a third node in the core network, the first multicast join request including a source address and multicast group address of a source of a multicast stream. The first node determines that the source address and the multicast group address for the source are behind the EVPN subnet at the second node. The first node sends to the second node, a control plane join request message that includes a receiver identifier that identifies the third node as a receiver of the multicast stream, the receiver identifier enabling the second node to forward the multicast stream directly into the core network to the third node.