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    MALLEABLE ROUTING FOR DATA PACKETS
    11.
    发明申请
    MALLEABLE ROUTING FOR DATA PACKETS 有权

    公开(公告)号：US20220272032A1

    公开(公告)日：2022-08-25

    申请号：US17685929

    申请日：2022-03-03

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Peter Psenak ,  Francois Clad ,  Jose Antonio Liste

    IPC: H04L45/302 ,  H04L45/50 ,  H04L41/0813 ,  H04L45/12 ,  H04L45/44 ,  H04L45/42

    Abstract: Various implementations disclosed herein enable malleable routing for data packets. For example, in various implementations, a method of routing a type of data packets is performed by a device. In some implementations, the device includes a non-transitory memory and one or more processors coupled with the non-transitory memory. In some implementations, the method includes determining a routing criterion to transmit a set of data packets across a network. In some implementations, the method includes identifying network nodes and communication links in the network that satisfy the routing criterion. In some implementations, the method includes determining a route for the set of data packets through the network nodes and the communication links that satisfy the routing criterion. In some implementations, the method includes configuring the network nodes that are on the route with configuration information that allows the set of data packets to propagate along the route.

    Systems and methods for determining secure network elements using flexible algorithm technology
    12.
    发明授权
    Systems and methods for determining secure network elements using flexible algorithm technology 有权

    公开(公告)号：US11121961B2

    公开(公告)日：2021-09-14

    申请号：US16598852

    申请日：2019-10-10

    Applicant: Cisco Technology, Inc.

    Inventor： Peter Psenak ,  Paul William Wells ,  Ketan Jivan Talaulikar ,  Clarence Filsfils

    IPC: H04L12/721 ,  H04L29/06

    Abstract: In one embodiment, an apparatus 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 apparatus to perform operations including receiving a first type-length-value (TLV) associated with a winning flexible algorithm definition (FAD) from a first element of a network. The operations also include determining a security level for the winning FAD based on the TLV. The operations further include determining a data transmission route through a plurality of elements of the network based on the security level for the winning FAD.

    Reroute detection in segment routing data plane
    13.
    发明授权
    Reroute detection in segment routing data plane 有权

    公开(公告)号：US11032197B2

    公开(公告)日：2021-06-08

    申请号：US15266498

    申请日：2016-09-15

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Peter Psenak

    IPC: H04L12/741 ,  H04L12/703 ,  H04W24/06 ,  H04L29/06

    Abstract: Methods and systems are disclosed for detection of reroute occurrences in segment routing enabled networks. In one embodiment, a method includes receiving, at a first node in a communications network, a test message comprising a header, where the header comprises one or more segment identifiers. This embodiment of the method further includes detecting a first indicator of a rerouted test path for the message and sending an outgoing message to a node determined using the header, where sending the outgoing message comprises including in the outgoing message a second indicator that the test message has been rerouted. An embodiment of a system includes a network interface adapted for data communication with one or more nodes of a communications network and a processor operably coupled to the network interface and adapted to implement an embodiment of the method.

    Communicating Packets Across Multi-Domain Networks Using Compact Forwarding Instructions
    14.
    发明申请
    Communicating Packets Across Multi-Domain Networks Using Compact Forwarding Instructions 有权

    公开(公告)号：US20210092053A1

    公开(公告)日：2021-03-25

    申请号：US16580944

    申请日：2019-09-24

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Francois Clad ,  Zafar Ali ,  Peter Psenak

    IPC: H04L12/721 ,  H04L12/715 ,  H04L29/06

    Abstract: Techniques and mechanisms for compressing the size of SIDs to be smaller than a complete IPv6 address (or “micro SIDs”), and scaling micro SIDs across a multi-domain environment using micro SID-domain-blocks. Segment routing over IPv6 (SRv6) uses 128-bit IPv6 addresses as SIDs for segment routing. According to this disclosure, multiple SRv6 SIDs may be expressed in a compact format such that a 128-bit IPv6 address, such as the destination address field of the IPv6 header, may store multiple micro SIDs. Further, SID-domain-blocks may be assigned to each domain in a multi-domain network such that micro SIDs may be expressed in the context of a given domain, rather than being shared in the global multi-domain network. In this way, lists of domain-specific SIDs may be fully expressed in the IPv6 destination address of the packet to scale micro SID into large, multi-domain networks.

    Multicast error detection and recovery
    15.
    发明授权
    Multicast error detection and recovery 有权

    公开(公告)号：US10833808B1

    公开(公告)日：2020-11-10

    申请号：US16428203

    申请日：2019-05-31

    Applicant: Cisco Technology, Inc.

    Inventor： Roshan Lal ,  Rishi Chhibber ,  Mankamana Prasad Mishra ,  Peter Psenak ,  Padmanab Pathikonda ,  Francesco Meo ,  Anand Kumar Singh

    IPC: H04L1/12 ,  H04L12/18 ,  H04L1/18

    Abstract: Multicast error detection and recovery may be provided. A join request for a multicast stream may be sent from a first network node to a second network node. The join request may be sent over a first link of a plurality of links between the first network node and the second network node. A redirect message indicating that the second network node cannot accommodate the join request may be received by the first network node from the second network node. In response to receiving the redirect message, the join request for the multicast stream may not be sent on a second link of the plurality of links by the first network node to the second network node. And in response to receiving the redirect message, an alternate upstream network node may be determined by the first network node to send the join request for the multicast stream to.

    DISTRIBUTION OF SEGMENT IDENTIFIERS IN NETWORK FUNCTIONS VIRTUALIZATION AND SOFTWARE DEFINED NETWORK ENVIRONMENTS
    16.
    发明申请
    DISTRIBUTION OF SEGMENT IDENTIFIERS IN NETWORK FUNCTIONS VIRTUALIZATION AND SOFTWARE DEFINED NETWORK ENVIRONMENTS 有权
    网络功能部门标识符的分配虚拟化和软件定义的网络环境

    公开(公告)号：US20170054626A1

    公开(公告)日：2017-02-23

    申请号：US14832888

    申请日：2015-08-21

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Muthurajah Sivabalan ,  Sami Boutros ,  Peter Psenak ,  Rex Emmanuel Fernando ,  Clarence Filsfils

    IPC: H04L12/755 ,  H04L12/707 ,  H04L12/46

    CPC classification number: H04L45/021 ,  H04L12/4662 ,  H04L45/22 ,  H04L45/64

    Abstract: A method and system are disclosed for distributing (advertising) segment identifiers in network functions virtualization and/or software defined networking environments. An exemplary method includes receiving a route advertisement that includes a prefix with a forwarding address for a first network element and receiving a segment identifier (SID) advertisement that includes a prefix SID for the prefix. The route advertisement may be received from a second network element proxying control plane functions for the first network element. Reachability information for the first network element is updated based on the route advertisement and the SID advertisement.

    Abstract translation: 公开了用于在网络功能虚拟化和/或软件定义的网络环境中分发（广告）段标识符的方法和系统。 一种示例性方法包括：接收包括具有第一网络元件的转发地址的前缀的路由通告，并且接收包括前缀的前缀SID的段标识符（SID）通告。 路由通告可以从第二网络元件接收用于第一网络元件的代理控制平面功能。 基于路由广告和SID广告来更新第一网元的可达性信息。

    OPTIMIZED PROTECTED SEGMENT-LIST DETERMINATION FOR WEIGHTED SRLG TI-LFA PROTECTION
    20.
    发明公开
    OPTIMIZED PROTECTED SEGMENT-LIST DETERMINATION FOR WEIGHTED SRLG TI-LFA PROTECTION 审中-公开

    公开(公告)号：US20240089190A1

    公开(公告)日：2024-03-14

    申请号：US18516571

    申请日：2023-11-21

    Applicant: Cisco Technology, Inc.

    Inventor： Manish Gupta ,  Peter Psenak

    IPC: H04L45/12

    CPC classification number: H04L45/12

    Abstract: A method includes generating a first shortest path tree for traffic routing in a network, the first shortest path tree identifying a corresponding shortest path from the network node to other nodes in the network and generating a second shortest path tree for traffic routing after removing an element from the network. The second shortest path tree identifies a corresponding shortest path from the network node to the other nodes in the network with the element removed. A third shortest path tree is generated, which is a weighted version of the second shortest path tree with a weight value added to any node or link in the network sharing a SRLG value with the element removed from the network. Network traffic is enforced based on a comparison of the third shortest path tree with at least one of the first shortest path tree and the second shortest path tree.

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