公开(公告)号：US20210368004A1

公开(公告)日：2021-11-25

申请号：US17397269

申请日：2021-08-09

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay Kumar Hooda ,  Satish Kumar Kondalam

IPC: H04L29/08 ,  H04L12/721

Abstract: Presented herein are techniques to provide an endpoint in a multi-site Software-defined network (SDN) fabric with an Internet access route that is optimal for the specific site in which the endpoint is located. In particular, a control plane node in a first site of a multi-site SDN fabric registers a border node in the first site as a Default Egress Tunnel Router (ETR) for Internet access or unknown endpoint identifier (EID) of the first site. The first site includes at least one endpoint. The control plane node receives a request for Internet access for the at least one endpoint and provides a dynamically-selected Internet access route via a same or different virtual instance (e.g., Virtual Routing and Forwarding (VRF) function(s), Virtual Private Network(s) (VPNs), Virtual Networks (VNs), etc.) for Internet traffic sent by the at least one endpoint.

公开(公告)号：US10798195B2

公开(公告)日：2020-10-06

申请号：US15834341

申请日：2017-12-07

Applicant: Cisco Technology, Inc.

Inventor： Sanjay K. Hooda ,  Prakash Jain ,  Marc P. Comeras ,  Victor M. Moreno ,  Atri Indiresan

IPC: H04L29/08 ,  H04L29/12

Abstract: The embodiments herein push notifications to network devices used by a shared service to which a roaming host in a network fabric is subscribed. For example, a network fabric controller can access a VN policy table which stores the relationships between the virtual networks in the network fabric. Using this table, the controller can identify what shared service VNs (i.e., extranets) can communicate with the host's VN. The controller can push out notifications to the network devices used by the shared service VNs to store the new location of the host. That is, the network devices that locally store a location of the host can update their routing caches to point to the new location of the host. In this manner, the network fabric can reduce the time needed to reconverge on the new location of the host by updating the network devices used by the shared service VNs.

公开(公告)号：US11695824B2

公开(公告)日：2023-07-04

申请号：US17397269

申请日：2021-08-09

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay Kumar Hooda ,  Satish Kumar Kondalam

IPC: H04L67/10 ,  H04L45/44

CPC classification number: H04L67/10 ,  H04L45/44

Abstract: Presented herein are techniques to provide an endpoint in a multi-site Software-defined network (SDN) fabric with an Internet access route that is optimal for the specific site in which the endpoint is located. In particular, a control plane node in a first site of a multi-site SDN fabric registers a border node in the first site as a Default Egress Tunnel Router (ETR) for Internet access or unknown endpoint identifier (EID) of the first site. The first site includes at least one endpoint. The control plane node receives a request for Internet access for the at least one endpoint and provides a dynamically-selected Internet access route via a same or different virtual instance (e.g., Virtual Routing and Forwarding (VRF) function(s), Virtual Private Network(s) (VPNs), Virtual Networks (VNs), etc.) for Internet traffic sent by the at least one endpoint.

公开(公告)号：US11563622B2

公开(公告)日：2023-01-24

申请号：US17070648

申请日：2020-10-14

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Jaganbabu Rajamanickam ,  Madhan Sankaranarayanan ,  Prakash Jain

IPC: H04L41/06 ,  H04L43/0805

Abstract: A method is performed by a node configured to implement an Operation, Administration, and Maintenance (OAM) protocol for rapid link failure detection. The node receives peer OAM packets sent by a peer node over a link at a peer periodic interval. While in a first mode of the OAM protocol, the node determines whether the peer node is reachable based on the peer OAM packets, sends OAM packets to the peer node at a periodic interval to indicate to the peer node that the node is reachable, and responsive to detecting a critical condition of the node that impairs the sending the OAM packets, transitions to a second mode of the OAM protocol. While in the second mode, the node adds, to the peer OAM packets, a code to indicate the critical condition, and reflects the peer OAM packets with the code back to the peer node.

公开(公告)号：US20210218794A1

公开(公告)日：2021-07-15

申请号：US16737964

申请日：2020-01-09

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay Kumar Hooda ,  Satish Kumar Kondalam

IPC: H04L29/08 ,  H04L12/721

Abstract: Presented herein are techniques to provide an endpoint in a multi-site Software-defined network (SDN) fabric with an Internet access route that is optimal for the specific site in which the endpoint is located. In particular, a control plane node in a first site of a multi-site SDN fabric registers a border node in the first site as a Default Egress Tunnel Router (ETR) for Internet access or unknown endpoint identifier (EID) of the first site. The first site includes at least one endpoint. The control plane node receives a request for Internet access for the at least one endpoint and provides a dynamically-selected Internet access route via a same or different virtual instance (e.g., Virtual Routing and Forwarding (VRF) function(s), Virtual Private Network(s) (VPNs), Virtual Networks (VNs), etc.) for Internet traffic sent by the at least one endpoint.

公开(公告)号：US11057292B1

公开(公告)日：2021-07-06

申请号：US16566714

申请日：2019-09-10

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay K. Hooda ,  Victor Moreno

IPC: H04L12/66 ,  H04L12/751 ,  H04L29/06 ,  H04L12/707

Abstract: Techniques for network routing border convergence are described. Backup paths for external connections for a network are established and provide for a temporary path for network traffic during network routing convergence, preventing traffic loss at network border nodes.

公开(公告)号：US12284108B2

公开(公告)日：2025-04-22

申请号：US18343931

申请日：2023-06-29

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay K. Hooda ,  Victor Moreno

IPC: H04L45/02 ,  H04L9/40 ,  H04L12/66 ,  H04L45/00

Abstract: Techniques for network routing border convergence are described. Backup paths for external connections for a network are established and provide for a temporary path for network traffic during network routing convergence, preventing traffic loss at network border nodes.

公开(公告)号：US11729089B2

公开(公告)日：2023-08-15

申请号：US17304672

申请日：2021-06-24

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay K. Hooda ,  Victor Moreno

IPC: H04L45/02 ,  H04L12/66 ,  H04L45/00 ,  H04L9/40

CPC classification number: H04L45/02 ,  H04L12/66 ,  H04L45/22 ,  H04L63/0227

Abstract: Techniques for network routing border convergence are described. Backup paths for external connections for a network are established and provide for a temporary path for network traffic during network routing convergence, preventing traffic loss at network border nodes.

公开(公告)号：US20220272033A1

公开(公告)日：2022-08-25

申请号：US17185279

申请日：2021-02-25

Applicant: Cisco Technology, Inc.

Inventor： Prakash Jain ,  Sanjay Kumar Hooda ,  Rajeev Kumar ,  Saravanan Radhakrishnan ,  Solomon T. Lucas ,  Ramesh Yeevani-Srinivas

IPC: H04L12/717 ,  H04L12/725 ,  H04L12/715 ,  H04L12/713 ,  H04L12/26 ,  H04L12/46

Abstract: A map server/map resolver (MS/MR) of a Locator ID Separation Protocol (LISP) control plane for an enterprise private network for group-based service insertion is described. The MS/MR may facilitate communications from a first host having a first endpoint ID (EID) and located at a first tunnel router having a first routing locator (RLOC), to a second host having a second EID and located at a second tunnel router having a second RLOC. The MS/MR receives, from the first tunnel router, a map request for requesting an EID-to-RLOC mapping associated with the second EID and including a group identifier. The MS/MR selects a service insertion policy including an address of a service border router for a service that is registered with the MS/MR, and responds with a map reply including the address for populating an overlay route for forwarding communications via the service border router for insertion of the registered service.

公开(公告)号：US20220116261A1

公开(公告)日：2022-04-14

申请号：US17070648

申请日：2020-10-14

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Jaganbabu Rajamanickam ,  Madhan Sankaranarayanan ,  Prakash Jain

IPC: H04L12/24 ,  H04L12/26

Abstract: A method is performed by a node configured to implement an Operation, Administration, and Maintenance (OAM) protocol for rapid link failure detection. The node receives peer OAM packets sent by a peer node over a link at a peer periodic interval. While in a first mode of the OAM protocol, the node determines whether the peer node is reachable based on the peer OAM packets, sends OAM packets to the peer node at a periodic interval to indicate to the peer node that the node is reachable, and responsive to detecting a critical condition of the node that impairs the sending the OAM packets, transitions to a second mode of the OAM protocol. While in the second mode, the node adds, to the peer OAM packets, a code to indicate the critical condition, and reflects the peer OAM packets with the code back to the peer node.