公开(公告)号：US20210258226A1

公开(公告)日：2021-08-19

申请号：US17218360

申请日：2021-03-31

Applicant: Cisco Technology, Inc.

Inventor： Srinivas Pitta ,  Shrawan Chittoor Surender ,  Satish Kumar Kondalam ,  Somnath Roy ,  Siddartha Gundeti

IPC: H04L12/24

Abstract: Presented herein are systems, and methods thereof, that is configured to enter a maintenance mode to isolate itself from its neighbor and to gracefully cause neighbor devices to isolate themselves from the system, as to cause minimal or “zero” service disruption with its neighbors. The system broadcasts a maintenance-related message, via a standard transport layer, over routing protocols, to counter parts protocols at the neighbor device and waits for an acknowledgement message from the neighbor network devices. The broadcast and acknowledgement, through standard transport layer messaging, ensures that traffic generated by such protocols at the neighbor devices, regardless of manufacturer, are redirected before the system fully enters into the maintenance mode.

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：US11563682B2

公开(公告)日：2023-01-24

申请号：US17180090

申请日：2021-02-19

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Sanjay K. Hooda ,  Victor M. Moreno ,  Satish Kumar Kondalam

IPC: H04L45/74 ,  H04L49/10 ,  H04L45/64 ,  H04L45/02

Abstract: In one embodiment, a method generally includes a first edge (E) node in a network receiving an encapsulated data packet, wherein the encapsulated data packet comprises an outer header and a data packet, wherein the outer header comprises a first router locator (RLOC) corresponding to the first E node, wherein the data packet comprises an internet protocol (IP) header, and wherein the IP header comprises a destination endpoint identification (EID) corresponding to a host H. The first E node determines whether the host H is attached to the first E node. And in response to the first E node determining the host is attached to the first E node, the first E node forwards the data packet to the host H. The first E node receives a message from another node after the host H detaches from the first E node and reattaches to another E node, wherein the message comprises the destination EID.

公开(公告)号：US11546254B2

公开(公告)日：2023-01-03

申请号：US17098633

申请日：2020-11-16

Applicant: Cisco Technology, Inc.

Inventor： Prakash Chand Jain ,  Sanjay Kumar Hooda ,  Victor M. Moreno ,  Satish Kumar Kondalam

IPC: H04L45/302 ,  H04L45/586 ,  H04L45/64 ,  H04L47/80 ,  H04L49/25

Abstract: In one embodiment, a method is performed at a node in a multi-site enterprise fabric. The method includes obtaining map entries from a fabric control plane of the multi-site enterprise fabric, where the map entries are associated with identifiers of endpoints in external networks, site and virtual network identifiers of sites in the multi-site enterprise fabric, location identifiers of border nodes, and characteristics of the border nodes. The method further includes receiving a request from a source to connect to an external endpoint. After deriving an external endpoint identifier and source parameters, the method additionally includes establishing at least one connection between the source and the external endpoint via border node(s) that are selected from the map entries based at least in part on the source parameters, the external endpoint identifier, and characteristics of the border node(s) with their site and virtual network identifier(s) along the at least one connection.

公开(公告)号：US12244560B2

公开(公告)日：2025-03-04

申请号：US18478942

申请日：2023-09-29

Applicant: Cisco Technology, Inc.

Inventor： Prakash C. Jain ,  Sanjay Kumar Hooda ,  Satish Kumar Kondalam ,  Vikram Vikas Pendharkar ,  Anoop Vetteth ,  Solomon T Lucas

IPC: H04L9/40 ,  H04L41/0894 ,  H04L47/70

Abstract: This disclosure describes techniques to operate a control plane in a network fabric. The techniques include determining a stateless rule corresponding to communication between a first segment of the network fabric and a second segment of the network fabric. The techniques further include configuring the control plane to enforce the stateless rule.

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：US20210176173A1

公开(公告)日：2021-06-10

申请号：US17180090

申请日：2021-02-19

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Sanjay K. Hooda ,  Victor M. Moreno ,  Satish Kumar Kondalam

IPC: H04L12/741 ,  H04L12/715 ,  H04L12/933

Abstract: In one embodiment, a method generally includes a first edge (E) node in a network receiving an encapsulated data packet, wherein the encapsulated data packet comprises an outer header and a data packet, wherein the outer header comprises a first router locator (RLOC) corresponding to the first E node, wherein the data packet comprises an internet protocol (IP) header, and wherein the IP header comprises a destination endpoint identification (EID) corresponding to a host H. The first E node determines whether the host H is attached to the first E node. And in response to the first E node determining the host is attached to the first E node, the first E node forwards the data packet to the host H. The first E node receives a message from another node after the host H detaches from the first E node and reattaches to another E node, wherein the message comprises the destination EID.

公开(公告)号：US10652047B2

公开(公告)日：2020-05-12

申请号：US16010444

申请日：2018-06-16

Applicant: Cisco Technology, Inc.

Inventor： Prakash Chand Jain ,  Sanjay Kumar Hooda ,  Victor M. Moreno ,  Satish Kumar Kondalam

IPC: H04L12/46 ,  H04L12/741

Abstract: In one embodiment, a method is performed at a first node. The method may include receiving, at a first node, a request from a source host associated with a network to communicate with a destination host. The first node may determine whether the destination host is associated with the network. If the destination host is not associated with the network, the first node may determine an instance identifier (IID) and a proxy egress tunnel router (PETR) locator address used to communicate with the destination host. The first node may send an indicator to an ingress tunnel router (ITR) to encapsulate a packet with the IID and the PETR locator address before sending the packet from the source host to the destination host.

公开(公告)号：US20200076702A1

公开(公告)日：2020-03-05

申请号：US16679634

申请日：2019-11-11

Applicant: Cisco Technology, Inc.

Inventor： Srinivas Pitta ,  Shrawan Chittoor Surender ,  Satish Kumar Kondalam ,  Somnath Roy ,  Siddartha Gundeti

IPC: H04L12/24

Abstract: Presented herein are systems, and methods thereof, that is configured to enter a maintenance mode to isolate itself from its neighbor and to gracefully cause neighbor devices to isolate themselves from the system, as to cause minimal or “zero” service disruption with its neighbors. The system broadcasts a maintenance-related message, via a standard transport layer, over routing protocols, to counter parts protocols at the neighbor device and waits for an acknowledgement message from the neighbor network devices. The broadcast and acknowledgement, through standard transport layer messaging, ensures that traffic generated by such protocols at the neighbor devices, regardless of manufacturer, are redirected before the system fully enters into the maintenance mode.

公开(公告)号：US10523563B2

公开(公告)日：2019-12-31

申请号：US15949398

申请日：2018-04-10

Applicant: Cisco Technology, Inc.

Inventor： Sanjay K. Hooda ,  Victor M. Moreno ,  Satish Kumar Kondalam

IPC: H04L12/741 ,  H04L12/933 ,  H04L12/715

Abstract: In one embodiment, a method generally includes a first edge (E) node in a network receiving an encapsulated data packet, wherein the encapsulated data packet comprises an outer header and a data packet, wherein the outer header comprises a first router locator (RLOC) corresponding to the first E node, wherein the data packet comprises an internet protocol (IP) header, and wherein the IP header comprises a destination endpoint identification (EID) corresponding to a host H. The first E node determines whether the host H is attached to the first E node. And in response to the first E node determining the host is attached to the first E node, the first E node forwards the data packet to the host H. The first E node receives a message from another node after the host H detaches from the first E node and reattaches to another E node, wherein the message comprises the destination EID.