公开(公告)号：US20210226890A1

公开(公告)日：2021-07-22

申请号：US17182221

申请日：2021-02-22

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Ali Sajassi ,  Lukas Krattiger

IPC: H04L12/723 ,  H04L12/715 ,  H04L12/46 ,  H04L12/66 ,  H04L12/721

Abstract: A system and method are disclosed for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. A system is configured to receive a route advertisement, examine the label fields of the route advertisement, and determine whether Layer 2 or Layer 3 information is conveyed. The system is further configured to build a route advertisement to advertise to a second device based on whether Layer 2 or Layer 3 information is conveyed in the first route advertisement.

公开(公告)号：US20210092056A1

公开(公告)日：2021-03-25

申请号：US16582906

申请日：2019-09-25

Applicant: Cisco Technology, Inc.

Inventor： IJsbrand Wijnands ,  Lukas Krattiger ,  Mankamana Prasad Mishra ,  Brian Christopher Farnham

IPC: H04L12/723 ,  H04L12/18 ,  H04L12/751 ,  G06F16/22

Abstract: In one embodiment, a first label-distribution-protocol (LDP) session is established between a first interface of a first computing device and a second computing device, while a second LDP session is established between a second interface and the second computing device. The method may further comprise receiving a request from a third computing device to subscribe to a multicast group, storing an association between a first label, the multicast group, and the first interface, and sending, to the second computing device via the first LDP session, an indication that the first label is associated with the multicast group. Further, the method may include receiving a request from a fourth computing device to subscribe to the multicast group, storing an association between a second label, the multicast group and, the second interface, and sending, via the second LDP session, an indication that the second label is associated with the multicast group.

公开(公告)号：US20200351164A1

公开(公告)日：2020-11-05

申请号：US16399043

申请日：2019-04-30

Applicant: Cisco Technology, Inc.

Inventor： Uffaz Nathaniel ,  Aakruthi Ramkumar Gopisetty ,  Jason David Notari ,  Shyam Kapadia ,  Lukas Krattiger

IPC: H04L12/24 ,  H04L12/741 ,  H04L12/46

Abstract: The present technology provides a framework for user-guided end-to-end automation of network deployment and management, that enables a user to guide the automation process for any kind of network deployment from the ground up, as well as offering network management, visibility, and compliance verification. The disclosed technology accomplishes this by creating a stateful and interactive virtual representation of a fabric using a customizable underlay fabric template instantiated with user-provided parameter values and network topology data computed from one or more connected network devices. A set of expected configurations corresponding to the user-specified underlay and overly fabric policies is then generated for deployment onto the connected network devices. Network deviations from the intended fabric policies are addressed by the provision of one or more configuration lines to be deployed onto or removed from the connected network devices to bring the network state in agreement with the set of expected configuration.

公开(公告)号：US20190068449A1

公开(公告)日：2019-02-28

申请号：US15683196

申请日：2017-08-22

Applicant: Cisco Technology, Inc.

Inventor： Vrishab Sikand ,  Liqin Dong ,  Lukas Krattiger ,  Lifen Tian

IPC: H04L12/24 ,  H04L12/46

Abstract: The present disclosure involves systems and methods for automating interconnecting or stitching disparate Layer 2 domains across data center interconnects without the need to renumber virtual local area networks (VLANs) within an existing network. The interconnected networks may allow components or virtual machines, such as containers, within the connected networks or data centers to exchange Layer 2 communications while the connected VLANs or fabrics retain existing VLAN identification numbers to minimize alterations made to the data center networks. Further, the process of interconnecting the data centers may be automated such that administrators of the networks may provide an indication of interconnecting the data center networks without the need to manually access and configure edge devices of the networks to facilitate the Layer 2 communication.

公开(公告)号：US10050876B2

公开(公告)日：2018-08-14

申请号：US14539176

申请日：2014-11-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Lukas Krattiger

IPC: H04L12/28 ,  H04L12/715 ,  H04L12/723 ,  H04L12/741 ,  H04L12/46

Abstract: In one embodiment, a method includes importing a route target for a remote Virtual Routing and Forwarding instance (VRF) at a leaf node in an overlay network, the leaf node comprising at least one local VRF configured thereon, processing routes received for the route target at the leaf node, and installing the routes for the remote VRF at the local VRF at the leaf node to enable inter-VRF communication via the leaf node. An apparatus and logic are also disclosed herein.

公开(公告)号：US20180013654A1

公开(公告)日：2018-01-11

申请号：US15205031

申请日：2016-07-08

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Lukas Krattiger ,  Wing Hon Yeung ,  Uffaz Nathaniel ,  Richard Lam

IPC: H04L12/26 ,  H04L12/46 ,  H04L12/24 ,  H04L29/08

CPC classification number: H04L67/18 ,  H04L12/4641 ,  H04L41/0856 ,  H04L41/12

Abstract: Presented herein are techniques for actively monitoring, at a network controller, a network location of an endpoint connected to the network based on control plane updates. The network controller is configured to archive the network location of the endpoint, along with local information for the endpoint, in an endpoint tracking database of the network controller.

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.

公开(公告)号：US11924083B2

公开(公告)日：2024-03-05

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: H04L45/02 ,  H04L12/46

CPC classification number: H04L45/04 ,  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.

公开(公告)号：US20240048485A1

公开(公告)日：2024-02-08

申请号：US17882163

申请日：2022-08-05

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Suresh Pasupula ,  Manju Ramesh ,  Christophe Paggen ,  Huyen Trung Duong ,  Lukas Krattiger

IPC: H04L45/745 ,  H04L45/42 ,  H04L45/24 ,  H04L61/5007

CPC classification number: H04L45/745 ,  H04L45/42 ,  H04L45/24 ,  H04L61/5007

Abstract: Techniques for using more-specific routing to perform scalable Layer-2 (L2) stretching of subnets across hybrid-cloud environments. Routing tables in a public cloud may allow for routes that are more specific than the default local route, and the more-specific routes may be used to send all traffic to a dedicated, cloud router. The more-specific routes are set up for a VPC where a subnet resides such that the more specific-routes cover at least a portion of subnet range. The next hop for the more-specific routes point to the cloud router which is capable of doing host routing and segmentation extension. Thus, traffic originating from endpoints in a VPC is routed to the cloud router, and the cloud router determines whether the traffic is to be re-routed back to a destination endpoint in the VPC (or another cloud location), or sent to a destination endpoint residing in the on-premises site.

公开(公告)号：US20230421498A1

公开(公告)日：2023-12-28

申请号：US17816341

申请日：2022-07-29

Applicant: Cisco Technology, Inc.

Inventor： Lukas Krattiger ,  Shyam Kapadia ,  Massimiliano Ardica ,  Shankar Gopalkrishnan

IPC: H04L45/745 ,  H04L45/00 ,  H04L61/103

CPC classification number: H04L45/745 ,  H04L45/22 ,  H04L61/103

Abstract: Disclosed are systems, apparatuses, methods, and computer-readable media for providing interoperable heterogenous networks. A method comprises configuring a logical network with a first network and a second network; receiving a request message from a source device by the first border device in the first network, wherein the request message includes a related to a media access control (MAC) address associated with a destination device in the second network; sending a proxy message to the second border device based on the request message, the proxy message having a source address that identifies an external IP address associated with the first border device; receiving a response message including the MAC address of the destination device, wherein the response message is addressed to the external address of the first border device; and sending a border gateway protocol (BGP) update including the MAC address of the destination device.