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    INJECTING CONTROLLED NETWORK FAILURES USING IN-SITU OAM AND OTHER TECHNIQUES
    14.
    发明申请
    INJECTING CONTROLLED NETWORK FAILURES USING IN-SITU OAM AND OTHER TECHNIQUES 有权

    公开(公告)号：US20220353143A1

    公开(公告)日：2022-11-03

    申请号：US17243740

    申请日：2021-04-29

    Applicant: Cisco Technology, Inc.

    Inventor： Craig Thomas Hill ,  Cesar Obediente

    IPC: H04L12/24

    Abstract: A network controller is configured to control a plurality of network devices in a network. The network controller generates one or more commands that are configured to inject a failure to propagate through two or more network devices in the network. The network controller provides the one or more commands to at least one of the two or more network devices to initiate the failure. The one or more commands cause the failure cause the two or more network devices to collect and propagate telemetry data, on a hop-by-hop basis. The network controller obtains the telemetry data collected from the two or more network devices, and analyzes the telemetry data to determine an impact in the network of the failure propagated through the two or more network devices.

    Leveraging MACsec key agreement (MKA) state events to trigger fast IGP/EGP convergence on MACsec encrypted links
    15.
    发明授权
    Leveraging MACsec key agreement (MKA) state events to trigger fast IGP/EGP convergence on MACsec encrypted links 有权

    公开(公告)号：US11411915B2

    公开(公告)日：2022-08-09

    申请号：US16243733

    申请日：2019-01-09

    Applicant: Cisco Technology, Inc.

    Inventor： Craig Thomas Hill ,  Stephen Michael Orr

    IPC: H04L45/021 ,  H04L9/40 ,  H04L9/08 ,  H04L69/18

    Abstract: A network device configured to communicate with a network executes a security protocol. The security protocol establishes a secure session with a security peer network device, exchanges security protected traffic with the security peer network device over a secure link, detects whether there is a security failure in the secure session, and upon detecting a security failure, signals there is a security failure. The network device also executes a routing protocol. The routing protocol maintains a routing table that includes a route to the security peer over the secure link, routes the security protected traffic along the route, and, upon receiving from the security protocol the signal that there is a security failure, removes the route from the routing table to stop the routing.

    Synchronizing link and event detection mechanisms with a secure session associated with the link
    17.
    发明授权
    Synchronizing link and event detection mechanisms with a secure session associated with the link 有权

    公开(公告)号：US11128663B2

    公开(公告)日：2021-09-21

    申请号：US16161716

    申请日：2018-10-16

    Applicant: Cisco Technology, Inc.

    Inventor： Craig Thomas Hill ,  Stephen Michael Orr

    IPC: H04L29/06 ,  H04L29/08

    Abstract: A first network element, such as a router, in a computer network may have established a communication link with a second network element in the computer network. A secure session associated with the communication link between the first and second network elements may then be established. The secure session may use a secure communication function on each of the first network element and the second network element. The first network element may then detect that the first network element cannot communicate with the second network element over the communication link. When the first network element cannot communicate with the second network element, the first network element may terminate the communication link and the secure session associated with the communication link.

    Virtual testing of network resiliency
    19.
    发明授权
    Virtual testing of network resiliency 有权

    公开(公告)号：US12149436B2

    公开(公告)日：2024-11-19

    申请号：US17979640

    申请日：2022-11-02

    Applicant: Cisco Technology, Inc.

    Inventor： David John Zacks ,  Nagendra Kumar Nainar ,  Madhan Sankaranarayanan ,  Jaganbabu Rajamanickam ,  Craig Thomas Hill ,  Cesar Obediente

    IPC: H04L45/00 ,  H04L43/50 ,  H04L45/28

    Abstract: Technologies for testing resiliency of a data network with real-world accuracy without affecting the flow of production data through the network. A method according to the technologies may include receiving a production data packet and determining a preferred data route toward a destination node for the production data packet based on a first routing information base, wherein the first routing information base includes a database where routes and route metadata are stored according to a routing protocol. The method may also include, receiving a test data packet, and determining an alternate data route toward the destination node for the test data packet based on a second routing information base, wherein the second routing information base simulates an error in the preferred data route. The method may include sending the production data packet to the preferred data route and sending the test data packet to the alternate data route.

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