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    BGP AGGREGATION IN CLOS NETWORKS
    1.
    发明申请
    BGP AGGREGATION IN CLOS NETWORKS 审中-公开

    公开(公告)号：WO2020198292A1

    公开(公告)日：2020-10-01

    申请号：PCT/US2020/024590

    申请日：2020-03-25

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： HEITZ, Jakob ,  RAO, Dhananjaya Kasargod ,  THUBERT, Pascal

    IPC: H04L12/715 ,  H04L12/721 ,  H04L12/753

    Abstract: The present disclosure provides Border Gateway Protocol route aggregation in a Clos fabric when one or more communication failures are detected. A method includes receiving a prefix component of a first aggregate route from a first next hop node, the prefix component being associated with a failed network element; announcing, to one or more neighboring nodes, the first aggregate route along with the prefix component and the first next hop node associated with the failed network element; identifying, by the one or more neighboring nodes, a second aggregate route, the second aggregate route being a shortest aggregate route that contains the first aggregate route; and generating, from the second aggregate route, one or more Chad routes to the prefix component of the first aggregate route, wherein the one or more Chad routes are associated with one or more next hop nodes that are different from the first next hop node.

    ADVERTISING BGP DESTINATION SECURE PATH REQUIREMENT IN GLOBAL INTERNET
    2.
    发明申请
    ADVERTISING BGP DESTINATION SECURE PATH REQUIREMENT IN GLOBAL INTERNET 审中-公开

    公开(公告)号：WO2023022880A1

    公开(公告)日：2023-02-23

    申请号：PCT/US2022/039230

    申请日：2022-08-03

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： AGRAWAL, Swadesh ,  RAO, Dhananjaya Kasargod ,  HEITZ, Jakob ,  VOIT, Eric

    IPC: H04L9/40 ,  H04L9/32 ,  H04L45/74

    Abstract: Disclosed are systems, apparatuses, methods, and computer-readable media for secure network routing. A method includes: receiving, at a network node, an advertisement message for a network route including an IP address prefix; receiving, at the network node, a route origin authorization associated with the IP address prefix, the route origin authorization including a digital signature and a security requirement of a route to a destination that corresponds to the IP address prefix; determining, by the network node, one or more network nodes satisfies the security requirement to yield a determination; and determining, by the network node, to route network traffic to the IP address prefix based on the determination. In one example, the method can include, when the one or more network nodes satisfies the security requirement, advertising the route to the one or more network nodes that satisfies the security requirement.

    ROUTING IN FAT TREE NETWORKS USING NEGATIVE DISAGGREGATION ADVERTISEMENTS
    3.
    发明申请
    ROUTING IN FAT TREE NETWORKS USING NEGATIVE DISAGGREGATION ADVERTISEMENTS 审中-公开

    公开(公告)号：WO2019204107A1

    公开(公告)日：2019-10-24

    申请号：PCT/US2019/026908

    申请日：2019-04-11

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： THUBERT, Pascal ,  LEVY-ABEGNOLI, Eric ,  HEITZ, Jakob

    IPC: H04L12/751 ,  H04L12/753 ,  H04L12/707 ,  H04L12/703 ,  H04L12/933 ,  H04L12/735

    Abstract: A particular fat tree network node stores default routing information indicating that the particular fat tree network node can reach a plurality of parent fat tree network nodes of the particular fat tree network node. The particular fat tree network node obtains, from a first parent fat tree network node of the plurality of parent fat tree network nodes, a negative disaggregation advertisement indicating that the first parent fat tree network node cannot reach a specific destination. The particular fat tree network node determines whether the first parent fat tree network node is the only parent fat tree network node of the plurality of parent fat tree network nodes that cannot reach the specific destination. If so, the particular fat tree network node installs supplemental routing information indicating that every parent fat tree network node except the first parent fat tree network node can reach the specific destination.

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