公开(公告)号：US12184736B2

公开(公告)日：2024-12-31

申请号：US18349778

申请日：2023-07-10

Applicant: Cisco Technology, Inc.

Inventor： Prosenjit Sarkar ,  Satish Kumar Mahadevan ,  Ravi Kiran Chintallapudi ,  Mahendra Kumar Samarya

IPC: H04L67/141 ,  H04L41/0803

Abstract: Disclosed herein are systems, methods, and computer-readable media for upgrading vSmart controllers. In one aspect, a method includes an edge router receiving a notification from a vSmart controller that an upgrade to the controller will occur. The notification can be dynamically triggered by a centralized network management system. In some embodiments, the vSmart controller can run as a virtual machine (VM) and maintains a control plane connection with one or more edge routers in an overlay network. In response to the notification, a length of time of an expiry timer in which the edge router attempts to connect to the vSmart controller can be increased, and the edge router can connect to the vSmart controller once the increased length of time has passed.

公开(公告)号：US20250016236A1

公开(公告)日：2025-01-09

申请号：US18894144

申请日：2024-09-24

Applicant: Cisco Technology, Inc.

Inventor： Prosenjit Sarkar ,  Satish Kumar Mahadevan ,  Ravi Kiran Chintallapudi ,  Mahendra Kumar Samarya

IPC: H04L67/141 ,  H04L41/0803

Abstract: Disclosed herein are systems, methods, and computer-readable media for upgrading vSmart controllers. In one aspect, a method includes an edge router receiving a notification from a vSmart controller that an upgrade to the controller will occur. The notification can be dynamically triggered by a centralized network management system. In some embodiments, the vSmart controller can run as a virtual machine (VM) and maintains a control plane connection with one or more edge routers in an overlay network. In response to the notification, a length of time of an expiry timer in which the edge router attempts to connect to the vSmart controller can be increased, and the edge router can connect to the vSmart controller once the increased length of time has passed.

公开(公告)号：US20250007825A1

公开(公告)日：2025-01-02

申请号：US18344685

申请日：2023-06-29

Applicant: Cisco Technology, Inc.

Inventor： Satish Kumar Mahadevan ,  Basavaraju Halappa ,  Prosenjit Sarkar ,  Srinivas Yalamanchali ,  Sourav Sen

IPC: H04L45/42 ,  H04L45/12 ,  H04L45/76

Abstract: Techniques for symmetric routing in a software-defined wide area network (SDWAN) are disclosed herein. In some aspects, the techniques described herein relate to a method including: determining a first device group, wherein the first device group includes a first router associated with a branch tag and a second router associated with a hub tag; determining a second device group, wherein the second device group includes a third router associated with and a fourth router associated with the hub tag; transmitting a first route advertisement associated with a first route from the first router to the second router to the first router; transmitting a second route advertisement associated with a second route from the first router to the third router to the first router; and preventing transmission of a third route advertisement associated with a third route from the first router to the fourth router to the first router.

公开(公告)号：US20250071061A1

公开(公告)日：2025-02-27

申请号：US18456266

申请日：2023-08-25

Applicant: Cisco Technology, Inc.

Inventor： Satish Kumar Mahadevan ,  Sheikh M Qumruzzaman ,  Ravi Kiran Chintallapudi ,  Prosenjit Sarkar ,  Sourav Sen ,  Balaji Sundararajan ,  Rahul P Hardikar

IPC: H04L45/76

Abstract: Systems and methods are provided for re-balancing and healing of an SD-WAN in an unbalanced state and/or experiencing one or more failure states. In response to a request to connect to a new controller resulting from OMP load shedding from a first controller, the system can identify other controllers capable of handling the load requirements of the edge router. The system can incorporate the controller group preference of the edge router and select a second controller based on the identified other controllers and within the preferred controller group. If not possible, the system can temporarily assign the edge router to non-preferred controller groups and move them back to controllers in the preferred controller group once it becomes viable. The system further enhances OMP graceful restart (GR) logic to incorporate the load shedding effect and avoid unnecessary route retention that GR entails.

公开(公告)号：US12238006B1

公开(公告)日：2025-02-25

申请号：US18456266

申请日：2023-08-25

Applicant: Cisco Technology, Inc.

Inventor： Satish Kumar Mahadevan ,  Sheikh M Qumruzzaman ,  Ravi Kiran Chintallapudi ,  Prosenjit Sarkar ,  Sourav Sen ,  Balaji Sundararajan ,  Rahul P Hardikar

IPC: G06F15/173 ,  H04L45/76

Abstract: Systems and methods are provided for re-balancing and healing of an SD-WAN in an unbalanced state and/or experiencing one or more failure states. In response to a request to connect to a new controller resulting from OMP load shedding from a first controller, the system can identify other controllers capable of handling the load requirements of the edge router. The system can incorporate the controller group preference of the edge router and select a second controller based on the identified other controllers and within the preferred controller group. If not possible, the system can temporarily assign the edge router to non-preferred controller groups and move them back to controllers in the preferred controller group once it becomes viable. The system further enhances OMP graceful restart (GR) logic to incorporate the load shedding effect and avoid unnecessary route retention that GR entails.

公开(公告)号：US20240340347A1

公开(公告)日：2024-10-10

申请号：US18349778

申请日：2023-07-10

Applicant: Cisco Technology, Inc.

Inventor： Prosenjit Sarkar ,  Satish Kumar Mahadevan ,  Ravi Kiran Chintallapudi ,  Mahendra Kumar Samarya

IPC: H04L67/141 ,  H04L41/0803

CPC classification number: H04L67/141 ,  H04L41/0803

Abstract: Disclosed herein are systems, methods, and computer-readable media for upgrading vSmart controllers. In one aspect, a method includes an edge router receiving a notification from a vSmart controller that an upgrade to the controller will occur. The notification can be dynamically triggered by a centralized network management system. In some embodiments, the vSmart controller can run as a virtual machine (VM) and maintains a control plane connection with one or more edge routers in an overlay network. In response to the notification, a length of time of an expiry timer in which the edge router attempts to connect to the vSmart controller can be increased, and the edge router can connect to the vSmart controller once the increased length of time has passed.