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公开(公告)号：US20250119389A1
公开(公告)日：2025-04-10
申请号：US18985763
申请日：2024-12-18
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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公开(公告)号：US11838200B2
公开(公告)日：2023-12-05
申请号：US17448695
申请日：2021-09-23
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Swadesh Agrawal , Zafar Ali , Pablo Camarillo Garvia , Francois Clad
IPC: H04L45/02 , H04L45/741
CPC classification number: H04L45/04 , H04L45/741
Abstract: In one embodiment, a network comprises a first forwarding domain using a first data plane forwarding protocol and a second forwarding domain using a second data plane forwarding protocol different than the first data forwarding plane forwarding protocol. The first forwarding domain includes a first path node and a particular border node. The second forwarding domain includes a second path node and the particular border node. The particular border node performs Segment Routing or other protocol interworking between the different data plane forwarding domains, such as for transporting packets through a different forwarding domain or translating a packet to use a different data forwarding protocol. These forwarding domains typically include Segment Routing (SR) and SR-Multiprotocol Label Switching (SR-MPLS). Paths through the network are determined by a Path Computation Engine and/or based on route advertisements such associated with Binding Segment Identifiers (BSIDs) (e.g., labels, Internet Protocol version 6 addresses).
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公开(公告)号：US11190394B2
公开(公告)日：2021-11-30
申请号：US16599010
申请日：2019-10-10
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Ali Sajassi , Krishnaswamy Muddenahally Ananthamurthy , Samir Thoria , Suma Kachinthaya , Swadesh Agrawal
IPC: H04L12/24 , H04L12/947 , H04L29/12 , H04L12/18
Abstract: In one embodiment, a first computer networking device executes an election algorithm to determine whether at least the first computer networking device or a second computer networking device is responsible for forwarding, to at least one receiving device, communications addressed to a specified group of computing devices. The first computer networking device may further store first data indicating that the first computer networking device is responsible for forwarding the communications. However, in response to the first computer networking device determining that it is no longer receiving the communications, it may store second data indicating that the first computer networking device is no longer responsible for forwarding the communications and may send, to the second computer networking device, third data indicating that the first computer networking device is not receiving the communications.
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公开(公告)号：US20240348553A1
公开(公告)日：2024-10-17
申请号：US18298552
申请日：2023-04-11
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Nitin Kumar , Ali Sajassi , Swadesh Agrawal
CPC classification number: H04L47/32 , H04L12/185 , H04L12/1863 , H04L45/026 , H04L45/34 , H04L45/50
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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公开(公告)号：US20240056379A1
公开(公告)日：2024-02-15
申请号：US17884259
申请日：2022-08-09
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Ali Sajassi , Nitin Kumar , Swadesh Agrawal , Anuj Budhiraja
Abstract: A system and method for handling multicast traffic in Ethernet Virtual Private Network multi-homed networks includes receiving a first route table for a first route, determining that the first route table is associated with another peer device in the multi-home network, generating a second route table for a second route, determining a route to transmit data and the determined route is the first route or the second route based on the first preference value and the second preference value, and transmitting the data using the determined route.
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Patent Agency Ranking
公开(公告)号：US20200092122A1
公开(公告)日：2020-03-19
申请号：US16133000
申请日：2018-09-17
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Mishra , Swadesh Agrawal , Ali Sajassi , Ijsbrand Wijnands , Samir Thoria
IPC: H04L12/18 , H04L12/723
Abstract: A computer network efficiently provides a multicast network flow to a multicast recipient across a multihomed network element. The multihomed network element includes network devices that receive multicast data from a source of a multicast network flow. Each particular network device that received the multicast data publishes a notification indicating that the multicast network flow is available from the particular network device. The computer network receives a subscription to the multicast network flow from a multicast recipient, and determines whether to bridge the multicast data across the multihomed network element based on a multicast configuration of the computer network. The multihomed network element provides the multicast data to the multicast recipient from at least one of the particular network devices that received the multicast data from the source of the multicast network flow.
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公开(公告)号：US20180367451A1
公开(公告)日：2018-12-20
申请号：US15625855
申请日：2017-06-16
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Sameer R. Gulrajani , Karthik Subramanian , Swadesh Agrawal
IPC: H04L12/741 , H04L12/761
Abstract: In a network environment using a PIM (Protocol Independent Multicast) multicast routing protocol, an Assert mechanism is implemented wherein a provider-edge (PE) device sends an Assert message on the Default MDT (multicast distribution tree) and causes selection of an Assert winner, wherein any ingress PE not selected as the Assert winner stops forwarding the data packets on the Data MDT; and the Assert winner sends periodic PIM control messages on the Default MDT to maintain the Assert state on all ingress PE routers until canceled or timed out. The Assert message is created in response to MDT Mapping from at least one other ingress PE device. The PIM control messages may contain a special bit extension which forces an RPF (reverse path forwarding) neighbor to keep pointing to the Assert winner until a PIM neighborship-down event is detected. This obviates the need for periodic Assert messaging and/or data packet punting.
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公开(公告)号：US20240129274A1
公开(公告)日：2024-04-18
申请号：US18541979
申请日：2023-12-15
Applicant: Cisco Technology, Inc.
Inventor： Clarence Filsfils , Swadesh Agrawal , Apoorva Karan
CPC classification number: H04L63/0209 , G06F21/602
Abstract: In one embodiment, a method by an apparatus of a Border Gateway Protocol (BGP) network includes accessing an attestation token for the apparatus. The method further includes encoding the attestation token in a BGP signaling message. The method further includes sending the BGP signaling message with the encoded attestation token to a second apparatus of the BGP network.
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公开(公告)号：US20230370297A1
公开(公告)日：2023-11-16
申请号：US18357771
申请日：2023-07-24
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Mishra , Swadesh Agrawal , Ali Sajassi , Ijsbrand Wijnands , Samir Thoria
CPC classification number: H04L12/1859 , H04L45/50 , H04L12/1895 , H04L12/185 , H04L2001/0093
Abstract: A computer network efficiently provides a multicast network flow to a multicast recipient across a multihomed network element. The multihomed network element includes network devices that receive multicast data from a source of a multicast network flow. Each particular network device that received the multicast data publishes a notification indicating that the multicast network flow is available from the particular network device. The computer network receives a subscription to the multicast network flow from a multicast recipient, and determines whether to bridge the multicast data across the multihomed network element based on a multicast configuration of the computer network. The multihomed network element provides the multicast data to the multicast recipient from at least one of the particular network devices that received the multicast data from the source of the multicast network flow.
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公开(公告)号：US11362949B2
公开(公告)日：2022-06-14
申请号：US16891035
申请日：2020-06-02
Applicant: Cisco Technology, Inc.
Inventor： Sameer Gulrajani , Swadesh Agrawal
IPC: H04L5/00 , H04L45/748 , H04L47/125 , H04L45/00
Abstract: This disclosure describes techniques for managing path counts at a router. The techniques include monitoring available storage space at a router for storing per prefix routes. In an instance where the available storage space at the router may be inadequate to support continued, stable network operations, the techniques include reducing an amount of per prefix routes that are advertised to the router. The techniques may also include withdrawing previously advertised per prefix routes from the router. As such, path count management concepts may help prevent overload of storage space at a router.
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