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公开(公告)号：US20230261963A1
公开(公告)日：2023-08-17
申请号：US17846647
申请日：2022-06-22
Applicant: Cisco Technology, Inc.
Inventor： Anubhav Gupta , Pritam Baruah , Laxmikantha Reddy Ponnuru , Sireesha Yeruva
Abstract: The subject matter of this disclosure relates in general to the field of computer networking, and more particularly, to systems and methods for discovery of a tunnel for wide area network. Certain aspects provide a method for network path analysis. The method includes sending a first probe packet configured to identify a network tunnel, wherein the first probe packet includes an identifier of the first probe packet and a first time to live (TTL) value that corresponds to a first network hop; receiving a first response message from the first network hop in the network tunnel, wherein the first response message corresponds to the first probe packet and includes the identifier of the first probe packet; and analyzing the network tunnel based on the first response message including the identifier of the first probe packet.
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公开(公告)号：US20230188460A1
公开(公告)日：2023-06-15
申请号：US17687821
申请日：2022-03-07
Applicant: Cisco Technology, Inc.
Inventor： Jigar Parekh , Satyajit Das , Prithvi Sharan , Laxmikantha Reddy Ponnuru
Abstract: In one embodiment, a method includes determining, by a network node, that a first plurality of tunnel interfaces resides in a core region of a network and determining, by the network node, that a second plurality of tunnel interfaces resides in an access region of the network. The method also includes configuring, by the network node, a first tunnel interface as a core regional fallback path for the core region of the network and configuring, by the network node, a second tunnel interface as an access regional fallback path for the access region of the network.
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公开(公告)号：US11329950B2
公开(公告)日：2022-05-10
申请号：US16530596
申请日：2019-08-02
Applicant: Cisco Technology, Inc.
Inventor： Ajay Kumar Mishra , Satyajit Das , Laxmikantha Reddy Ponnuru , Anubhav Gupta
IPC: H04W56/00 , H04L61/2592 , H04L61/5007 , H04L41/08 , H04L41/0668 , H04L45/00 , H04L12/46 , H04L67/12
Abstract: A WAN controller can configure a first WAN interface on a first WAN edge device to connect to a first transport network. The WAN controller can configure a second WAN interface on a second WAN edge device to connect to a second transport network. The WAN controller or the first WAN edge device, connected to a first access device of an access network, can determine the first WAN edge device has no Layer 2 connectivity to the second WAN edge device, connected to a second access device of the access network. The WAN controller or the first WAN edge device can establish a tunnel between the first WAN edge device and the second WAN interface. The WAN controller can route a specified class of WAN traffic received by the first WAN edge device from the access network through the tunnel.
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公开(公告)号：US10735981B2
公开(公告)日：2020-08-04
申请号：US15728559
申请日：2017-10-10
Applicant: Cisco Technology, Inc.
Inventor： Naiming Shen , Jun Zhuang , Laxmikantha Reddy Ponnuru , Veeranjaneyulu Pendyala
IPC: H04W24/04 , H04L29/12 , H04L12/24 , H04L12/931 , H04W76/12 , H04W40/24 , H04L12/723 , H04L12/46 , H04L12/721 , H04W76/32
Abstract: Disclosed is a method that includes receiving, at a layer 2 switch, a first message to establish a fast re-switch tunnel between the layer 2 switch and a standby wireless controller and receiving, at the layer 2 switch, a second message to trigger use of the fast re-switch tunnel. The switch receives data and forwards the data to the standby wireless controller through the fast re-switch tunnel. Once MAC tables are updated for the standby wireless controller, the fast re-switch tunnel can be torn down.
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公开(公告)号：US20250106149A1
公开(公告)日：2025-03-27
申请号：US18471931
申请日：2023-09-21
Applicant: Cisco Technology, Inc.
Inventor： Avinash Shah , Pritam Baruah , Amjad Inamdar , Laxmikantha Reddy Ponnuru , Latika Ahuja , Jai Prakash Agrawal
IPC: H04L45/00 , H04L9/40 , H04L45/745
Abstract: A system facilitates communication between branches of an SD-WAN and a service chain element. A hub node receives a data packet of a flow from a source branch over a VPN segment to be transmitted to a destination branch, extracts flow information from the data packet including VPN segment information to be stored in a flow table before transmitting the data packet to the service chain element over a service chain VPN. Upon return of the data packet from the service chain element, the hub node uses packet tuple information to retrieve the flow information with VPN segment information from the flow table. The hub node can then forward the data packet to the destination branch over the VPN segment. The hub node can generate and store an Auto Service Chaining Key that connects bidirectional flows so that the hub node can apply service-chaining to bidirectional traffic.
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Patent Agency Ranking
公开(公告)号：US12261919B2
公开(公告)日：2025-03-25
申请号：US18328300
申请日：2023-06-02
Applicant: Cisco Technology, Inc.
Inventor： Satish Kumar Mahadevan , Laxmikantha Reddy Ponnuru , Pritam Baruah
IPC: H04L67/51 , H04L45/02 , H04L45/12 , H04L45/302
Abstract: Techniques for enabling service insertion using dynamic service path selection are described herein. In some aspects, the techniques described herein relate to avoiding a service route that passes through a service router when the second-leg path from the service router to a destination router is unreachable. In some cases, the techniques described herein relate to avoiding a route that includes a service router that does not have a path to a viable target in a core service region.
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公开(公告)号：US20240406276A1
公开(公告)日：2024-12-05
申请号：US18328300
申请日：2023-06-02
Applicant: Cisco Technology, Inc.
Inventor： Satish Kumar Mahadevan , Laxmikantha Reddy Ponnuru , Pritam Baruah
IPC: H04L45/12 , H04L45/02 , H04L45/302 , H04L67/51
Abstract: Techniques for enabling service insertion using dynamic service path selection are described herein. In some aspects, the techniques described herein relate to avoiding a service route that passes through a service router when the second-leg path from the service router to a destination router is unreachable. In some cases, the techniques described herein relate to avoiding a route that includes a service router that does not have a path to a viable target in a core service region.
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公开(公告)号：US20240348536A1
公开(公告)日：2024-10-17
申请号：US18348065
申请日：2023-07-06
Applicant: Cisco Technology, Inc.
Inventor： Pritam Baruah , Amjad Inamdar , Laxmikantha Reddy Ponnuru , Avinash Shah , Jai Prakash Agrawal
IPC: H04L45/247 , H04L45/28
CPC classification number: H04L45/247 , H04L45/28
Abstract: One or more aspects of the present disclosure are directed to providing a single hierarchical construct for defining requirements (connectivity parameters) of a service in a service chain. In one aspect, a single construct for identifying a service in a service chain includes a first object identifying at least one path for accessing an instance of the service within a communication network, a second object identifying a respective communication protocol for the at least one path; and a third object identifying at least a transmission specification for the respective communication protocol in the second object, wherein the second object and the third object are embedded within the first object.
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公开(公告)号：US11929849B1
公开(公告)日：2024-03-12
申请号：US18127507
申请日：2023-03-28
Applicant: Cisco Technology, Inc.
Inventor： Satish Mahadevan , Laxmikantha Reddy Ponnuru , Samir Thoria , Alfred Clarence Lindem, III , Arul Murugan Manickam
CPC classification number: H04L12/462 , H04L45/18
Abstract: Techniques for ensuring symmetric forwarding between disparate networks. The techniques may include receiving a gateway preference order associated with a route advertised by an edge node, the edge node associated with a first network. The techniques may also include determining, based at least in part on the gateway preference order, that a gateway node is a more preferred gateway for the route than another gateway node, the gateway node configured to facilitate communications between the first network and a second network. In some examples, the techniques may also include converting the gateway preference order into a metric associated with an IP routing protocol that is in use in the second network. In some examples, the route including the metric may be distributed within the second network such that the gateway node is the more preferred gateway for return traffic of the route.
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公开(公告)号：US11784924B2
公开(公告)日：2023-10-10
申请号：US17110457
申请日：2020-12-03
Applicant: Cisco Technology, Inc.
Inventor： Samir Thoria , Ram Dular Singh , Praveen Raju Kariyanahalli , Laxmikantha Reddy Ponnuru , Ramanathan Lakshmikanthan
CPC classification number: H04L45/50 , H04L12/4641 , H04L45/04 , H04L45/22
Abstract: Systems and methods are provided for receiving bandwidth metrics from a plurality of routers on respective link routes in a network, compiling a link database including the bandwidth metrics of each respective link route in the network, selecting a first designated link path from the link database between a first router and a second router based on an application routing policy, the application routing policy being based on a routing metric, providing a first multiprotocol label switching label based on the first designated link path to the first router of the plurality of routers in the network, and restricting network traffic of the first router to the first designated link path provided in the first multiprotocol label switching label.
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