公开(公告)号：US10298490B2

公开(公告)日：2019-05-21

申请号：US14963470

申请日：2015-12-09

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang ,  Lukas Krattiger ,  Xinggang Zhou ,  Di Jin ,  Siu-Man Leung

IPC: H04L29/06 ,  H04L12/721 ,  H04L12/46 ,  H04L12/66 ,  H04L12/715 ,  H04L12/775 ,  H04L12/753

Abstract: Coexistence and migration of legacy and VXLAN networks may be provided. A first anchor leaf switch and a second anchor leaf switch may detect that they can reach each other over a Virtual Extensible Local Area Network (VXLAN) overlay layer 2 network. In response to detecting that they can reach each other over the VXLAN, the second anchor leaf switch may block VLANs mapped to the VXLAN's VXLAN Network Identifier (VNI) on the second anchor leaf switch's ports connecting to spine routers. In addition, the first anchor leaf switch and the second anchor leaf switch may detect that they can reach each other over a physical layer 2 network. In response to detecting that they can reach each other over a physical layer 2 network, the second anchor leaf switch may block Virtual Extensible Local Area Network (VXLAN) segments at the second anchor leaf switch.

公开(公告)号：US20180077047A1

公开(公告)日：2018-03-15

申请号：US15263556

申请日：2016-09-13

Applicant: Cisco Technology, Inc.

Inventor： Sathish Srinivasan ,  Vrishabha Sikand ,  Shyam N. Kapadia ,  Lukas Krattiger ,  Massimiliano Ardica

IPC: H04L12/751 ,  H04L12/46 ,  H04L12/721 ,  H04L29/12

CPC classification number: H04L45/02 ,  H04L12/4641 ,  H04L45/66 ,  H04L61/103 ,  H04L61/6022

Abstract: Presented herein are techniques to enable seamless mobility of hosts (endpoints) between disaggregated Ethernet virtual private network (EVPN) domains that are connected with one another by an external network (e.g., a Wide-Area Network (WAN)). In one example, a leaf node in the first domain, which was previously connected to a host, receives updated routing information for the host. The leaf node performs a local host verification process to confirm that the host has moved and, in response to confirming that that the host has moved, the first leaf node sends a targeted host announcement message to the host in the second domain.

公开(公告)号：US20170171056A1

公开(公告)日：2017-06-15

申请号：US14963470

申请日：2015-12-09

Applicant: Cisco Technology, Inc.

Inventor： Liqin Dong ,  Yibin Yang ,  Lukas Krattiger ,  Xinggang Zhou ,  Di Jin ,  Siu-Man Leung

IPC: H04L12/751 ,  H04L12/721 ,  H04L12/715 ,  H04L12/46 ,  H04L12/66

CPC classification number: H04L45/66 ,  H04L12/4641 ,  H04L12/66 ,  H04L45/48 ,  H04L45/58 ,  H04L45/64

Abstract: Coexistence and migration of legacy and VXLAN networks may be provided. A first anchor leaf switch and a second anchor leaf switch may detect that they can reach each other over a Virtual Extensible Local Area Network (VXLAN) overlay layer 2 network. In response to detecting that they can reach each other over the VXLAN, the second anchor leaf switch may block VLANs mapped to the VXLAN's VXLAN Network Identifier (VNI) on the second anchor leaf switch's ports connecting to spine routers. In addition, the first anchor leaf switch and the second anchor leaf switch may detect that they can reach each other over a physical layer 2 network. In response to detecting that they can reach each other over a physical layer 2 network, the second anchor leaf switch may block Virtual Extensible Local Area Network (VXLAN) segments at the second anchor leaf switch.

公开(公告)号：US20160134520A1

公开(公告)日：2016-05-12

申请号：US14539176

申请日：2014-11-12

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Shyam Kapadia ,  Lukas Krattiger

IPC: H04L12/721 ,  H04L12/753 ,  H04L12/801

CPC classification number: H04L45/64 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/50 ,  H04L45/54 ,  H04L2012/4629

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.

Abstract translation: 在一个实施例中，一种方法包括在覆盖网络中的叶节点处导入远程虚拟路由和转发实例（VRF）的路由目标，所述叶节点包括在其上配置的至少一个本地VRF，处理为所述路由目标接收的路由 在叶节点，在叶节点的本地VRF上安装远程VRF的路由，以便通过叶节点进行VRF间的通信。 本文还公开了一种装置和逻辑。

公开(公告)号：US20240291756A1

公开(公告)日：2024-08-29

申请号：US18656479

申请日：2024-05-06

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04L45/745 ,  H04L45/24 ,  H04L45/42 ,  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：US20220417141A1

公开(公告)日：2022-12-29

申请号：US17805616

申请日：2022-06-06

Applicant: Cisco Technology, Inc.

Inventor： Samir Thoria ,  Ali Sajassi ,  Lukas Krattiger

IPC: H04L45/50 ,  H04L45/64 ,  H04L12/46 ,  H04L12/66 ,  H04L45/00

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：US20220368592A1

公开(公告)日：2022-11-17

申请号：US17813118

申请日：2022-07-18

Applicant: Cisco Technology, Inc.

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

IPC: H04L41/08 ,  H04L12/46 ,  H04L41/0806 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/74

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：US11336515B1

公开(公告)日：2022-05-17

申请号：US17179692

申请日：2021-02-19

Applicant: Cisco Technology, Inc.

Inventor： Munish Mehta ,  Sundeep Kumar Singh ,  Shyam N. Kapadia ,  Mohammed Javed Asghar ,  Lukas Krattiger

IPC: H04L41/0806 ,  H04L61/2596 ,  H04L69/22 ,  H04L12/46

Abstract: Presented herein are systems and methods to enable simultaneous interoperability with policy-aware and policy-unaware data center sites. A multi-site orchestrator (MSO) device can be configured to obtain configuration information for each of a plurality of different data center sites. The data center sites may include one or more on-premises sites and one or more off-premises sites, each of which may include one or more policy-aware sites and/or one or more policy-unaware sites. The MSO can selectively use namespace translations to create a unified fabric across the different data center sites, enabling one or more hosts and/or applications at a first of the data center sites to communicate with one or more hosts and/or applications at a second of the data center sites, regardless of the sites' respective configurations.

公开(公告)号：US20220014429A1

公开(公告)日：2022-01-13

申请号：US17355651

申请日：2021-06-23

Applicant: Cisco Technology, Inc.

Inventor： Shyam Kapadia ,  Lukas Krattiger ,  Jason David Notari

IPC: H04L12/24 ,  H04L29/06

Abstract: Techniques for a configuration change service to transition a network controller into a frozen state, causing network users submitting configuration changes associated with the network to refrain from deploying the configuration changes for a period of time are disclosed. A first user configured as a stager role may submit data representing a proposed change to the configuration change service, where the proposed change may be stored in association with a list of proposed changes. A second user configured as an approver role may submit data representing an approval or disapproval of the proposed changes to the configuration change service, where a modified list of proposed changes may be generated. A third user configured as an administrator role may submit data configured to transition the controller to an unfrozen state and/or deploy the changes included in the list of proposed changes to the network controller, subsequent to the period of time.

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.