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公开(公告)号：US20220173919A1
公开(公告)日：2022-06-02
申请号：US17671807
申请日：2022-02-15
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Jayashree Subramanian , Stig Ingvar Venaas , Rishabh Parekh , Ravindran Rajarao
Abstract: In an example method for redundant multicast trees with fast recovery, a protocol independent multicast (PIM) backup designated router (BDR) can receive a request from a host to join a multicast group associated with a source; send to a next hop a PIM join message identifying an address of the PIM BDR and identifying the PIM join message as a backup PIM join; receive, from a PIM router along a path to/from the source, a unicast message sent to the address which identifies a second address associated with the PIM router; store the second address and a route associated with the unicast message; in response to a designated router migration trigger, set to blocking a backup multicast tree state associated with the source and multicast group; and send, to the PIM router, a unicast message including instructions to set to blocking a backup multicast tree state at the PIM router.
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公开(公告)号：US20220116308A1
公开(公告)日：2022-04-14
申请号：US17361510
申请日：2021-06-29
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Ijsbrand Wijnands , Anuj Budhiraja , Ali Sajassi , Stephane Litkowski , Satya Ranjan Mohanty
IPC: H04L12/761 , H04L12/18 , H04L12/751 , H04L12/713 , H04L12/46
Abstract: A method comprises, at a first router configured to perform Bit Index Explicit Replication (BIER) for forwarding of multicast packets in a network, storing configuration information that indicates that the first router belongs to multiple subdomains of a BIER domain, and is able to forward the multicast packets for a virtual private network on the multiple subdomains. The method further comprises, during an auto-discovery procedure, generating an auto-discovery message to include an auto-discovery route and route attributes that indicate the multiple subdomains, and sending the auto-discovery message to a second router of the virtual private network the network.
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公开(公告)号：US10924395B2
公开(公告)日：2021-02-16
申请号：US16358421
申请日：2019-03-19
Applicant: Cisco Technology, Inc.
Inventor： Ijsbrand Wijnands , Mankamana Prasad Mishra , Nagendra Kumar Nainar , Luc De Ghein
IPC: H04L12/723 , H04L12/751 , H04L12/761
Abstract: Seamless multipoint label distribution protocol (mLDP) transport over a bit index explicit replication (BIER) core may be provided. First, it may be determined that a first plurality of network devices comprise BIER edge routers. Then, in response to determining that the first plurality of network devices comprise BIER edge routers, a Targeted Label Distribution Protocol (T-LDP) session may be created between a first one of the first plurality of network devices and a second one of the first plurality of network devices. Next, an address of a peer device connected to the second one of the first plurality of network devices may be advertised by the second one of the first plurality of network devices over the T-LDP session.
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14.发明申请公开(公告)号：US20200236444A1
公开(公告)日：2020-07-23
申请号：US16843297
申请日：2020-04-08
Applicant: Cisco Technology, Inc.
Inventor： Ali Sajassi , Samir Thoria , Tapraj Singh , Mankamana Prasad Mishra
IPC: H04N21/6405 , H04L12/46 , H04L29/06 , H04N21/24 , H04N21/222
Abstract: A method is performed by a first provider edge (PE) of a redundancy group including provider edges configured with an Ethernet virtual private network (EVPN) segment identifier (EVI) and an Ethernet segment identifier (ESI) and that are multi-homed to a customer edge (CE). The method includes, upon receiving from the CE a join request including a group address for a multicast stream, electing a designated forwarder (DF) for the multicast stream. The electing includes: computing for each PE a respective affinity for the DF as a function of a respective address of the PE, the EVI, and the group address; and determining which PE has a largest affinity. The method further includes, if the first PE has the largest affinity or does not have the largest affinity, configuring the first PE as the designated forwarder or not configuring the first PE as the designated forwarder for the multicast stream, respectively.
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公开(公告)号：US20250141788A1
公开(公告)日：2025-05-01
申请号：US18494586
申请日：2023-10-25
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Anil Kumar , Sridhar Santhanam
Abstract: In one aspect, a computer-implemented method for redundant multicast groups, includes receiving a request for an element of content from a device, where the element of content is associated with a first source address and a redundant source group identifying multiple servers in a network including the element of content, determining a second source address within the redundant source group has a shorter distance to a location of the device, and routing packets associated with the element of content from the second source address to the device. The method further includes determining the connection has failed, and routing, automatically upon determining the connection has failed, the device to a third source address of the multiple servers, where the third source address is selected according to a server selection policy.
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Patent Agency Ranking
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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公开(公告)号：US20240195648A1
公开(公告)日：2024-06-13
申请号：US18317895
申请日：2023-05-15
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Sameer R. Gulrajani , Ali Sajassi , Swadesh Agrawal , Nitin Kumar
CPC classification number: H04L12/185 , H04L12/4633
Abstract: A system and associated methods provide procedures for establishing multicast connections and forwarding multicast content from a source to a subscriber when an ingress provider edge in communication with the subscriber is connected to an egress provider edge device belonging to an EVPN instance, especially in cases where the egress provider edge device is not receiving content from the source. The system configures “backup” provider edge devices belonging to the EVPN instance to temporarily forward the multicast content to the egress provider edge device on behalf of the source, enabling the ingress provider edge device and subscriber to continue to receive the multicast content from the source while the multicast network adjusts to recognize a new egress provider edge device. Methods of establishing connections between the ingress provider edge device and the correct egress provider edge device are also provided to avoid flooding and inefficient content forwarding throughout the network.
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公开(公告)号：US11997005B2
公开(公告)日：2024-05-28
申请号：US18166775
申请日：2023-02-09
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Ijsbrand Wijnands , Anuj Budhiraja , Ali Sajassi , Stephane Litkowski , Satya Ranjan Mohanty
CPC classification number: H04L45/16 , H04L12/185 , H04L12/1886 , H04L12/4641 , H04L45/02 , H04L45/586
Abstract: A method comprises, at a first router configured to perform Bit Index Explicit Replication (BIER) for forwarding of multicast packets in a network, storing configuration information that indicates that the first router belongs to multiple subdomains of a BIER domain, and is able to forward the multicast packets for a virtual private network on the multiple subdomains. The method further comprises, during an auto-discovery procedure, generating an auto-discovery message to include an auto-discovery route and route attributes that indicate the multiple subdomains, and sending the auto-discovery message to a second router of the virtual private network the network.
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公开(公告)号：US11888912B1
公开(公告)日：2024-01-30
申请号：US17736637
申请日：2022-05-04
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Rajiv Asati , Nitin Kumar , Luc De Ghein
IPC: H04L65/611 , H04L65/60
CPC classification number: H04L65/611 , H04L65/60
Abstract: This disclosure describes techniques for configuring an edge router of a communication provider network, the edge router coupled to communicate with a plurality of media streaming playback devices. Based at least in part on an indication of characteristics associated with the plurality of media streaming playback devices, a first multicast join for the edge router is configured to the communication provider network such that one or more media servers delivers a first plurality of media streams to the edge router via the communication provider network. Based at least in part on an indication of a request for an additional media stream not included in the first plurality of media streams, a second multicast join for the edge router is configured to the communication provider network such that the one or more media servers delivers the additional media stream to the edge router via the communication provider network.
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公开(公告)号：US20240007390A1
公开(公告)日：2024-01-04
申请号：US17810060
申请日：2022-06-30
Applicant: Cisco Technology, Inc.
Inventor： Mankamana Prasad Mishra , Anuj Budhiraja , Sridhar Santhanam , Sunil Krishnan K
Abstract: In one embodiment, a method by a router in a multicast network for multicast mtrace extension to trace one or more any-source multicast (ASM) sources includes transmitting a mtrace (*,G) route to a last hop router, receiving an active source list, and creating a mtrace (S,G) route for a rendezvous point (RP) to initiate based on the received active source list.
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