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公开(公告)号：US20250158911A1
公开(公告)日：2025-05-15
申请号：US18506870
申请日：2023-11-10
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Nitin Kumar , Vishal Madhav Ninawe , Rakesh Gandhi
IPC: H04L43/12 , H04L43/062 , H04L43/0817
Abstract: In some aspects, a computer-implemented method for performance monitoring in a multicast network, includes a controller causing a source router to originate a probe data packet. The controller may also originate, at the source router, the probe data packet, where the probe data packet is a data packet intended to measure performance data associated with one or more legs of a multicast distribution tree. Further, the source router may transmit the probe data packet through the multicast distribution tree using a probe identifier, where when received by a last hop router associated with the one or more legs of the multicast distribution tree, the last hop router redirects the probe data packet to a CPU of the last hop router configured to generate performance statistics. The source router may receive from the last hop router, the performance statistics.
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公开(公告)号：US12301404B2
公开(公告)日：2025-05-13
申请号：US18065221
申请日：2022-12-13
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Mishra Prasad , Nitin Kumar , Frank Brockners , Carlos M. Pignataro , Rakesh Gandhi
IPC: H04L45/16 , H04L41/0631 , H04L43/12
Abstract: A method is performed by a network controller that is configured to control routers configured to forward a multicast flow downstream from a first hop router that is a root of a multicast tree formed by the routers to last hop routers that terminate branches of the multicast tree, respectively. The method includes collecting operational configuration information from the routers and constructing a topological view of the multicast tree based on the operational configuration information; causing the routers to forward multicast probes downstream from the first hop router along all of the branches toward the last hop routers to trace the multicast tree; receiving, from particular ones of the last hop routers that received the multicast probes, indications that the multicast probes were received; and detecting failures in the multicast tree based on the indications and the topological view.
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公开(公告)号：US20250132972A1
公开(公告)日：2025-04-24
申请号：US18489057
申请日：2023-10-18
Applicant: Cisco Technology, Inc.
Inventor： Tarek Saad , Neeraj Malhotra , Satya R Mohanty , Nitin Kumar
IPC: H04L41/0659 , H04L45/02
Abstract: Methods and systems are described herein for reducing border gateway protocol (BGP) signaling for multi-homed devices. In one aspect, the method comprises: receiving one or more signals from one or more provider edge devices. The one or more signals include an address of a membership group associated with a multi-homed device. A router receives, from a provider edge device of the one or more provider edge devices, a service prefix. The service prefix is associated with the multi-homed device and the membership group. The router may store the service prefix and the one or more provider edge devices and connect, according to the service prefix and the one or more provider edge devices, to the multi-homed device associated with the membership group.
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公开(公告)号：US12143291B2
公开(公告)日：2024-11-12
申请号：US17900340
申请日：2022-08-31
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Mishra , Nitin Kumar , Sridhar Santhanam
IPC: G06F15/173 , H04L43/026 , H04L43/04 , H04L45/16
Abstract: A method is performed at a router on a multicast configured to forward a multicast flow. The method comprises: in response to receiving, from a controller connected to the multicast path or the multicast path, an enable command to enable statistics tracing for the multicast flow, determining whether the router has sufficient resources to perform statistics tracing; and when the router has the sufficient resources: responsive to the enable command, enabling statistics tracing to collect statistics for the multicast flow; generating a first request to include the enable command and the statistics; and forwarding the first request towards the controller.
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公开(公告)号：US20240314066A1
公开(公告)日：2024-09-19
申请号：US18183730
申请日：2023-03-14
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Ali Sajassi , Nitin Kumar
CPC classification number: H04L45/38 , H04L12/185 , H04L45/42
Abstract: A system and associated methods provide a scalable solution for managing multiple multicast flows within a multicast group of a multicast network. The system groups redundant sources of the multicast group according to their associated multicast flows, assigns flow identifiers to each redundant source indicative of their associated multicast flows, and facilitates Single Forwarder election to select a Single Forwarder that belongs to the appropriate multicast flow. The system provides control plane extensions that enable signaling of which redundant source belongs to which multicast flow.
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Patent Agency Ranking
公开(公告)号：US20240214315A1
公开(公告)日：2024-06-27
申请号：US18594173
申请日：2024-03-04
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Anuj Budhiraja , Nitin Kumar , Sridhar Santhanam
IPC: H04L47/10 , H04L12/18 , H04L43/0829
CPC classification number: H04L47/15 , H04L12/18 , H04L43/0829
Abstract: In an example method, a network administrative device receives an indication that a multicast data flow is experiencing traffic loss. The administrative device transmits instructions to a last hop to begin monitoring incoming traffic, if the last hop is receiving expected traffic, the last hop sends it location to the administrative device. If the last hop is not receiving expected traffic, it sends instruction to a next upstream device to start monitoring incoming traffic. Based on receiving a message indicating the location of the last hop, the administrative device determines a network fault is occurring at a location of the last hop. Based on receiving a message indicating a location of an upstream device, the administrative device determines a network fault is occurring at the location of the upstream device.
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公开(公告)号：US20230130631A1
公开(公告)日：2023-04-27
申请号：US17858215
申请日：2022-07-06
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Lukas Krattiger , Shyam Nayan Kapadia , Nitin Kumar
Abstract: In an example method, a head node connected to a source device transmits a multicast data flow from the source device to receiving devices connected to tail nodes using Default MDT. The example method further includes determining that requirements have been met to begin transmitting the multicast data flow using Data MDT. The method may further include determining whether the tail nodes are able to receive the multicast data flow using Data MDT. In response to determining that all the tail nodes are able to receive the multicast data flow using Data MDT, switch to transmitting the multicast data flow to the tail nodes using Data MDT. In response to determining that at least one of the tail nodes is unable to receive the multicast data flow using the Data MDT, continue transmitting the multicast data flow using Data MDT
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公开(公告)号：US11451468B2
公开(公告)日：2022-09-20
申请号：US17160508
申请日：2021-01-28
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Rajiv Asati , IJsbrand Wijnands , Stephane Litkowski , Nitin Kumar
Abstract: A method is performed at a router configured to perform Bit Index Explicit Replication (BIER) for forwarding of multicast packets in a network. The method includes, upon receiving a multicast packet of a multicast flow, accessing flow mappings in which multicast flows are mapped to fixed accounting values corresponding to the multicast flows. The method further comprises generating a BIER header for the multicast packet by encoding a multi-segment entropy field of the BIER header with (i) a variable entropy value for equal-cost multi-path (ECMP) load balancing, and (ii) a fixed accounting value among the fixed accounting values that is mapped to the multicast flow in the flow mappings. The method also includes encapsulating the multicast packet with the BIER header to produce an encapsulated multicast packet, and forwarding the encapsulated multicast packet.
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公开(公告)号：US11438220B2
公开(公告)日：2022-09-06
申请号：US17248547
申请日：2021-01-28
Applicant: Cisco Technology, Inc.
Inventor： Mankamana P. Mishra , Karthik Babu Harichandra Babu , Nitin Kumar , Manoj K. Pandey
IPC: H04L41/0659 , H04L41/0677 , H04L43/10 , H04L43/0811 , H04L41/12
Abstract: Techniques for connectivity issue remediation are provided. A first link trace message is automatically transmitted from a source end point to a destination end point. A first topology graph is generated for a network based on the first link trace message. Presence of a loop is detected in the network. A second link trace message is then transmitted from the source end point to the destination end point, and a second topology graph is automatically generated for the network based on the second link trace message. An edge in the network that caused the loop is identified based on comparing the first and second topology graphs.
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公开(公告)号：US12244509B2
公开(公告)日：2025-03-04
申请号：US18298552
申请日：2023-04-11
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Nitin Kumar , Ali Sajassi , Swadesh Agrawal
Abstract: A system and associated methods provide solutions for reducing a volume of traffic through a multicast network attributed to repeated maintenance messages, which are required in order to maintain a multicast connection. The system configures provider edge devices to generate and send maintenance messages on behalf of members of a multicast group to establish and maintain the multicast connection and provides options for determining unknown locations of sources and/or subscribers, thereby reducing the overall volume of traffic transmitted over the multicast network.
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