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    Hierarchical ECMP control plane for dense topologies
    4.
    发明授权
    Hierarchical ECMP control plane for dense topologies 有权

    公开(公告)号：US12003409B2

    公开(公告)日：2024-06-04

    申请号：US17897890

    申请日：2022-08-29

    Applicant: Cisco Technology, Inc.

    Inventor： Neeraj Malhotra ,  Satya Ranjan Mohanty ,  Dongling Duan ,  Nitin Kumar ,  Narasimha Prasad Salagame Nagaraj

    IPC: H04L45/24 ,  H04L45/74 ,  H04L47/17

    CPC classification number: H04L45/24 ,  H04L45/74 ,  H04L47/17

    Abstract: Techniques and mechanisms for a control plane approach for dense topologies that focusses on discovering shared ECMP groups in the control plane independent of per-prefix learning and then learning prefixes via these shared ECMP groups instead of learning prefixes via one next-hop at a time. In dense topologies, this approach helps minimize BGP path scale, corresponding signaling and enables control plane scaling that is an order of magnitude higher than a traditional eBGP control plane. During link and node topology changes, the described control plane approach enables control plane signaling that is prefix independent and an order of magnitude lower. A control plane approach to path-list sharing and prefix independent signaling on link and node topology changes enables prefix independent convergence (PIC) in scenarios that would not be possible otherwise with traditional FIB driven path-list sharing and PIC.

    Hierarchical ECMP control plane for dense topologies
    6.
    发明授权
    Hierarchical ECMP control plane for dense topologies 有权

    公开(公告)号：US11431619B2

    公开(公告)日：2022-08-30

    申请号：US17160102

    申请日：2021-01-27

    Applicant: Cisco Technology, Inc.

    Inventor： Neeraj Malhotra ,  Satya Ranjan Mohanty ,  Dongling Duan ,  Nitin Kumar ,  Narasimha Prasad Salagame Nagaraj

    IPC: H04L45/24 ,  H04L45/74 ,  H04L47/17

    Abstract: Techniques and mechanisms for a control plane approach for dense topologies that focusses on discovering shared ECMP groups in the control plane independent of per-prefix learning and then learning prefixes via these shared ECMP groups instead of learning prefixes via one next-hop at a time. In dense topologies, this approach helps minimize BGP path scale, corresponding signaling and enables control plane scaling that is an order of magnitude higher than a traditional eBGP control plane. During link and node topology changes, the described control plane approach enables control plane signaling that is prefix independent and an order of magnitude lower. A control plane approach to path-list sharing and prefix independent signaling on link and node topology changes enables prefix independent convergence (PIC) in scenarios that would not be possible otherwise with traditional FIB driven path-list sharing and PIC.

    HIERARCHICAL ECMP CONTROL PLANE FOR DENSE TOPOLOGIES
    7.
    发明申请
    HIERARCHICAL ECMP CONTROL PLANE FOR DENSE TOPOLOGIES 有权

    公开(公告)号：US20220239588A1

    公开(公告)日：2022-07-28

    申请号：US17160102

    申请日：2021-01-27

    Applicant: Cisco Technology, Inc.

    Inventor： Neeraj Malhotra ,  Satya Ranjan Mohanty ,  Dongling Duan ,  Nitin Kumar ,  Narasimha Prasad Salagame Nagaraj

    IPC: H04L12/707 ,  H04L12/741 ,  H04L12/801

    Abstract: Techniques and mechanisms for a control plane approach for dense topologies that focusses on discovering shared ECMP groups in the control plane independent of per-prefix learning and then learning prefixes via these shared ECMP groups instead of learning prefixes via one next-hop at a time. In dense topologies, this approach helps minimize BGP path scale, corresponding signaling and enables control plane scaling that is an order of magnitude higher than a traditional eBGP control plane. During link and node topology changes, the described control plane approach enables control plane signaling that is prefix independent and an order of magnitude lower. A control plane approach to path-list sharing and prefix independent signaling on link and node topology changes enables prefix independent convergence (PIC) in scenarios that would not be possible otherwise with traditional FIB driven path-list sharing and PIC.

    MULTIPLE NETWORK INTERFACING
    8.
    发明申请
    MULTIPLE NETWORK INTERFACING 有权

    公开(公告)号：US20210392069A1

    公开(公告)日：2021-12-16

    申请号：US17343697

    申请日：2021-06-09

    Applicant: Cisco Technology, Inc.

    Inventor： Samir Thoria ,  Neeraj Malhotra ,  Lukas Krattiger ,  Ali Sajassi ,  Rajesh Sharma ,  Kesavan Thiruvenkatasamy ,  Aparna Pattekar

    IPC: H04L12/715 ,  H04L12/46

    Abstract: This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.

    DCI stitching for data center overlays
    9.
    发明授权
    DCI stitching for data center overlays 有权

    公开(公告)号：US10554549B1

    公开(公告)日：2020-02-04

    申请号：US15421268

    申请日：2017-01-31

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Suresh Doddagaddavalli Basavarajappa ,  Kalpesh Kirtikant Zinjuwadia ,  Arjun Sreekantiah ,  Neeraj Malhotra ,  Patrice Brissette

    IPC: G06F15/173 ,  H04L12/741 ,  H04L12/46 ,  H04L29/08 ,  H04L12/751

    Abstract: Aspects of the embodiments are directed to methods, systems, and computer program products for stitching route targets between disparate virtual private network domains. Embodiments are directed to a datacenter interconnect (DCI) network element that is configured to receive from a first network node of a first domain a routing prefix comprising a first route target value; determine that the first route target value is associated with a first route target set, the first route target set associated with the first domain; determine a corresponding second route target set associated with a second domain; create a second routing prefix that includes one or more route target values from the second route target set; and transmit the second routing prefix to a network node in the second domain.

    OPTIMIZING EVPN FOR DATA CENTERS WITH REDUNDANT TOP-OF-RACK DEPLOYMENTS
    10.
    发明申请
    OPTIMIZING EVPN FOR DATA CENTERS WITH REDUNDANT TOP-OF-RACK DEPLOYMENTS 有权

    公开(公告)号：US20170171057A1

    公开(公告)日：2017-06-15

    申请号：US15043079

    申请日：2016-02-12

    Applicant: Cisco Technology, Inc.

    Inventor： Liqin Dong ,  Shyam Kapadia ,  Neeraj Malhotra ,  Richard Lam ,  Lukas Krattiger

    IPC: H04L12/751

    CPC classification number: H04L45/02

    Abstract: Presented herein are methods for advertising an IP prefix to address the connectivity problem in multi-chassis link aggregation scenario. A peer switch will advertise two VTEP addresses. It will use a physical IP (PIP) address as a next hop (NH) for a prefix route, while continuing to use a VIP for host IP and MAC route advertisement. A new virtual MAC is introduced and it is derived from the VIP as the router MAC associated with VIP. A switch is made to use a VIP for prefix advertisement when a device detects that the same prefix is reachable both locally and from its peer. This saves adjacency entries consumed in the remote VTEPs. These techniques fix the connectivity issue for prefix routes that is exposed with current EVPN, without requiring any additional adjacency resource consumption.

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