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    Loop detection and avoidance for segment routed traffic engineered paths
    11.
    发明授权
    Loop detection and avoidance for segment routed traffic engineered paths 有权

    公开(公告)号：US10833976B2

    公开(公告)日：2020-11-10

    申请号：US16185239

    申请日：2018-11-09

    Applicant: Cisco Technology, Inc.

    Inventor： Tarek Saad ,  Clarence Filsfils ,  Muthurajah Sivabalan

    IPC: H04L12/707 ,  H04L12/24 ,  H04L12/751 ,  H04L12/721 ,  H04L12/46 ,  H04L12/815

    Abstract: A method is described and in one embodiment includes receiving a packet of a traffic flow at an ingress node of a communications network; routing the packet to an egress node of the communications network via a first path comprising a tunnel if the packet was received from a node external to the communications network; and routing the packet to the egress node of the communications network via a second path that does not traverse the tunnel if the packet was received from a node internal to the communications network. The first path is identified by a first Forwarding Information Base (“FIB”) entry corresponding to the flow and the second path is identified by a second FIB entry corresponding to the flow.

    Scalable distributed end-to-end performance delay measurement for segment routing policies
    13.
    发明授权
    Scalable distributed end-to-end performance delay measurement for segment routing policies 有权

    公开(公告)号：US10230605B1

    公开(公告)日：2019-03-12

    申请号：US16121535

    申请日：2018-09-04

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Rakesh Gandhi ,  Tarek Saad ,  Sagar Soni ,  Patrick Khordoc

    IPC: H04L12/28 ,  H04L12/26 ,  H04L12/44 ,  H04J1/16

    Abstract: The present technology is directed to a scalable solution for end-to-end performance delay measurement for Segment Routing Policies on both SR-MPLS and SRv6 data planes. The scalability of the solution stems from the use of distributed PM sessions along SR Policy ECMP paths. This is achieved by dividing the SR policy into smaller sections comprised of SPT trees or sub-paths, each of which is associated with a Root-Node. Downstream SID List TLVs may be used in Probe query messages for signaling SPT information to the Root-Nodes Alternatively, this SPT signaling may be accomplished by using a centralized controller. Root-Nodes are responsible for dynamically creating PM sessions and measuring delay metrics for their associated SPT tree section. The root-nodes then send the delay metrics for their local section to an ingress PE node or to a centralized controller using delay metric TLV field of the response message.

    MAKE-BEFORE-BREAK MECHANISM FOR LABEL SWITCHED PATHS
    14.
    发明申请
    MAKE-BEFORE-BREAK MECHANISM FOR LABEL SWITCHED PATHS 审中-公开

    公开(公告)号：US20170111268A1

    公开(公告)日：2017-04-20

    申请号：US14886010

    申请日：2015-10-17

    Applicant: Cisco Technology, Inc.

    Inventor： George Swallow ,  Tarek Saad

    IPC: H04L12/723 ,  H04L12/729 ,  H04L12/741

    CPC classification number: H04L45/50 ,  H04L45/00 ,  H04L45/125 ,  H04L45/74

    Abstract: In one embodiment, a device in a network determines that traffic sent via a first label switched path should be sent via a new label switched path. The device sends the traffic along the new label switched path using a label stack that indicates one or more adjacency segments or interface binding labels. A particular node along the new label switched path is configured to forward the traffic via a particular interface of the node based on a corresponding interface binding label or adjacency segment indicated by the traffic. The device completes a switchover from the first path to the new path.

    BGP NEXT-HOP GROUPS FOR MULTI-HOMED SERVICES IN SCALED SERVICE PROVIDER NETWORKS
    15.
    发明申请
    BGP NEXT-HOP GROUPS FOR MULTI-HOMED SERVICES IN SCALED SERVICE PROVIDER NETWORKS 有权

    公开(公告)号：US20250132972A1

    公开(公告)日：2025-04-24

    申请号：US18489057

    申请日：2023-10-18

    Applicant: Cisco Technology, Inc.

    Inventor： Tarek Saad ,  Neeraj Malhotra ,  Satya R Mohanty ,  Nitin Kumar

    IPC: H04L41/0659 ,  H04L45/02

    Abstract: Methods and systems are described herein for reducing border gateway protocol (BGP) signaling for multi-homed devices. In one aspect, the method comprises: receiving one or more signals from one or more provider edge devices. The one or more signals include an address of a membership group associated with a multi-homed device. A router receives, from a provider edge device of the one or more provider edge devices, a service prefix. The service prefix is associated with the multi-homed device and the membership group. The router may store the service prefix and the one or more provider edge devices and connect, according to the service prefix and the one or more provider edge devices, to the multi-homed device associated with the membership group.

    Method and system for network traffic diversion
    16.
    发明授权
    Method and system for network traffic diversion 有权

    公开(公告)号：US12003406B2

    公开(公告)日：2024-06-04

    申请号：US17699237

    申请日：2022-03-21

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Patrice Brissette ,  Luc Andre Burdet ,  Jiri Chaloupka ,  Mei Zhang ,  Tarek Saad

    IPC: H04L45/00 ,  H04L45/28 ,  H04L45/50

    CPC classification number: H04L45/22 ,  H04L45/28 ,  H04L45/50

    Abstract: A method, network device, and computer program product for network traffic diversion are disclosed. In one embodiment, a method according to the present disclosure includes receiving a frame at a core edge node that is a member of a redundancy group (where the frame comprises network address information and a packet), and determining whether a link is affected by a network failure. The frame was sourced by a remote core edge node that is not a member of the redundancy group, and the network address information indicates that the packet is to be forwarded via the link. In response to the link being affected by the network failure, the method further includes generating a modified frame and forwarding the modified frame to another core edge node. The generating comprises including a redirect label in the modified frame. The another core edge node is another member of the redundancy group.

    Method and system for network traffic diversion
    17.
    发明授权
    Method and system for network traffic diversion 有权

    公开(公告)号：US11316777B2

    公开(公告)日：2022-04-26

    申请号：US16686896

    申请日：2019-11-18

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Patrice Brissette ,  Luc Andre Burdet ,  Jiri Chaloupka ,  Mei Zhang ,  Tarek Saad

    IPC: H04L12/707 ,  H04L45/00 ,  H04L45/50 ,  H04L45/28

    Abstract: A method, network device, and computer program product for network traffic diversion are disclosed. In one embodiment, a method according to the present disclosure includes receiving a frame at a core edge node that is a member of a redundancy group (where the frame comprises network address information and a packet), and determining whether a link (to which the core edge node is communicatively coupled) is affected by a network failure. The frame was sourced by a remote core edge node that is not a member of the redundancy group, and the network address information indicates that the packet is to be forwarded via the link. In response to the link being affected by the network failure, the method further includes generating a modified frame and forwarding the modified frame to another core edge node. The generating comprises including a redirect label in the modified frame. The another core edge node is another member of the redundancy group.

    SEGMENT ROUTING CONDUIT
    20.
    发明申请
    SEGMENT ROUTING CONDUIT 审中-公开
    分段路由协议

    公开(公告)号：US20170064717A1

    公开(公告)日：2017-03-02

    申请号：US15244735

    申请日：2016-08-23

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Clarence Filsfils ,  Muthurajah Sivabalan ,  Stefano B. Previdi ,  Tarek Saad

    IPC: H04W72/04 ,  H04L12/24 ,  H04L12/723 ,  H04L29/06 ,  H04L12/801 ,  H04L29/12

    CPC classification number: H04L69/22 ,  H04L41/5051 ,  H04L41/5077 ,  H04L45/50 ,  H04L47/17 ,  H04W88/12 ,  H04W88/16

    Abstract: Utilizing the systems disclosed herein, a network element (in a network) controls, within another network, the constraints of a service, timing of the creation of the service, and selection a service on which a packet is transmitted. For example, a first network element (located in a first network) receives a request associated with initiating a service. The request is received from a second network element located in a second network and includes at least one path constraint. The first network element controls creation of the service in the first network on behalf of the second network element located in the second network by, e.g., identifying a path based, at least in part, on the at least one path constraint; and binding an identifier and an interface to the path, wherein the interface is associated with one or more operation to perform on any traffic that is labeled with the identifier.

    Abstract translation: 利用本文公开的系统，网络元件（在网络中）在另一个网络内控制服务的约束，创建服务的定时，以及选择其上传送分组的服务。 例如，第一网络元件（位于第一网络中）接收与启动服务相关联的请求。 从位于第二网络中的第二网络单元接收该请求，并且包括至少一个路径约束。 第一网络元件至少部分地基于至少一个路径约束来控制代表位于第二网络中的第二网络元件在第一网络中创建服务，例如，基于路径; 以及将标识符和接口绑定到所述路径，其中所述接口与对标识有所述标识符的任何业务执行的一个或多个操作相关联。

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