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公开(公告)号：US11824797B1
公开(公告)日：2023-11-21
申请号：US17510982
申请日：2021-10-26
Applicant: Cisco Technology, Inc.
Inventor： Mankamana P. Mishra , Ali Sajassi , Arvind Venkateswaran , Jayashree Subramanian , Patrice Brissette , Satya Ranjan Mohanty
IPC: H04L49/201 , H04L49/354 , H04L61/103 , H04L45/24 , H04L45/00
CPC classification number: H04L49/201 , H04L45/20 , H04L45/24 , H04L49/354 , H04L61/103
Abstract: At a provider edge (PE) router of PE routers of an Ethernet virtual private network (EVPN) configured to implement a border gateway protocol (BGP): receiving, from a multicast receiver, a multicast join for multicast traffic originated from a multicast source; identifying a next hop PE router for the multicast source; generating an EVPN route to the PE router, the EVPN route including an EVPN instance-route target that identifies the EVPN, and a specifically targeted route target that identifies the next hop PE router and that is configured to override the EVPN instance-route target to cause only the next hop PE router, and not any other of the PE routers, to import the EVPN route, when the EVPN route is advertised across the EVPN to the PE routers; and advertising the EVPN route across the EVPN to the PE routers.
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公开(公告)号：US20220255835A1
公开(公告)日：2022-08-11
申请号：US17173387
申请日：2021-02-11
Applicant: Cisco Technology, Inc.
Inventor： Satya Ranjan Mohanty , Lukas Krattiger , Mankamana Prasad Mishra
IPC: H04L12/751 , H04L12/46
Abstract: A method is performed at a provider edge node configured to communicate with remote provider edge nodes over an Ethernet virtual private network. The method includes receiving, from the remote provider edge nodes, route advertisements for a common subnet hosted on the remote provider edge nodes. The route advertisements include distinct remote route distinguishers, a common IP prefix for the common subnet, and remote paths for the common subnet. The method further includes determining whether there are at least a predetermined number of the remote paths preferred over a local path for the common subnet hosted on the provider edge node based on the remote route distinguishers and a local route distinguisher for the local path. The method includes, when there are at least the predetermined number of the remote paths preferred over the local path, suppressing sending of a route advertisement for the local path for the common subnet.
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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：US12003409B2
公开(公告)日：2024-06-04
申请号：US17897890
申请日：2022-08-29
Applicant: Cisco Technology, Inc.
Inventor： Neeraj Malhotra , Satya Ranjan Mohanty , Dongling Duan , Nitin Kumar , Narasimha Prasad Salagame Nagaraj
Abstract: Techniques and mechanisms for a control plane approach for dense topologies that focusses on discovering shared ECMP groups in the control plane independent of per-prefix learning and then learning prefixes via these shared ECMP groups instead of learning prefixes via one next-hop at a time. In dense topologies, this approach helps minimize BGP path scale, corresponding signaling and enables control plane scaling that is an order of magnitude higher than a traditional eBGP control plane. During link and node topology changes, the described control plane approach enables control plane signaling that is prefix independent and an order of magnitude lower. A control plane approach to path-list sharing and prefix independent signaling on link and node topology changes enables prefix independent convergence (PIC) in scenarios that would not be possible otherwise with traditional FIB driven path-list sharing and PIC.
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公开(公告)号：US20230208737A1
公开(公告)日：2023-06-29
申请号：US18177971
申请日：2023-03-03
Applicant: Cisco Technology, Inc.
Inventor： Satya Ranjan Mohanty , Mankamana Prasad Mishra , Ali Sajassi , Mrinmoy Ghosh
IPC: H04L43/0882 , H04L12/66 , H04L49/25 , H04L12/18 , H04L12/46 , H04L69/326
CPC classification number: H04L43/0882 , H04L12/66 , H04L49/25 , H04L12/18 , H04L12/4641 , H04L69/326
Abstract: In one embodiment, a method includes receiving, by a first router, data from a network component. The method also includes determining, by the first router, a first link bandwidth capacity between the first router and a host device and determining, by the first router, a first score for the first router based on the first link bandwidth capacity. The method also includes determining, by the first router, a second link bandwidth capacity between a second router and the host device and determining, by the first router, a second score for the second router based on the second link bandwidth capacity. The method further includes comparing, by the first router, at least the first score and the second score to determine a highest score and assigning, by the first router, an edge router associated with the highest score to communicate the data to the host device.
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Patent Agency Ranking
公开(公告)号：US11546247B2
公开(公告)日：2023-01-03
申请号：US17153983
申请日：2021-01-21
Applicant: Cisco Technology Inc.
Inventor： Satya Ranjan Mohanty , Soumya Roy , Yuri Tsier , Apoorva Karan
IPC: H04L12/715 , H04L12/775 , H04L12/723 , H04L12/733 , H04L12/707 , H04L12/46 , H04L45/02 , H04L45/58 , H04L45/00 , H04L45/24 , H04L45/50
Abstract: In some embodiments, a first provider edge (PE) router is coupled to a first customer edge (CE) router; a second CE router; and a second PE router. The second PE router is coupled to the first CE router and the second CE router. The first PE router is configured with a primary label comprising a primary next hop of the first CE router and a backup next hop of the second PE router and a secondary label comprising a primary next hop of the first CE router and a backup next hop of the second CE router. The second PE router is configured with a primary label comprising a primary next hop of the first CE router and a backup next hop of the first PE router and a secondary label comprising a primary next hop of the first CE router and a backup next hop of the second CE router.
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公开(公告)号：US11431619B2
公开(公告)日：2022-08-30
申请号：US17160102
申请日：2021-01-27
Applicant: Cisco Technology, Inc.
Inventor： Neeraj Malhotra , Satya Ranjan Mohanty , Dongling Duan , Nitin Kumar , Narasimha Prasad Salagame Nagaraj
Abstract: Techniques and mechanisms for a control plane approach for dense topologies that focusses on discovering shared ECMP groups in the control plane independent of per-prefix learning and then learning prefixes via these shared ECMP groups instead of learning prefixes via one next-hop at a time. In dense topologies, this approach helps minimize BGP path scale, corresponding signaling and enables control plane scaling that is an order of magnitude higher than a traditional eBGP control plane. During link and node topology changes, the described control plane approach enables control plane signaling that is prefix independent and an order of magnitude lower. A control plane approach to path-list sharing and prefix independent signaling on link and node topology changes enables prefix independent convergence (PIC) in scenarios that would not be possible otherwise with traditional FIB driven path-list sharing and PIC.
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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：US11716277B2
公开(公告)日：2023-08-01
申请号：US17173387
申请日：2021-02-11
Applicant: Cisco Technology, Inc.
Inventor： Satya Ranjan Mohanty , Lukas Krattiger , Mankamana Prasad Mishra
CPC classification number: H04L45/02 , H04L12/4641
Abstract: A method is performed at a provider edge node configured to communicate with remote provider edge nodes over an Ethernet virtual private network. The method includes receiving, from the remote provider edge nodes, route advertisements for a common subnet hosted on the remote provider edge nodes. The route advertisements include distinct remote route distinguishers, a common IP prefix for the common subnet, and remote paths for the common subnet. The method further includes determining whether there are at least a predetermined number of the remote paths preferred over a local path for the common subnet hosted on the provider edge node based on the remote route distinguishers and a local route distinguisher for the local path. The method includes, when there are at least the predetermined number of the remote paths preferred over the local path, suppressing sending of a route advertisement for the local path for the common subnet.
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公开(公告)号：US20220337499A1
公开(公告)日：2022-10-20
申请号：US17857861
申请日：2022-07-05
Applicant: Cisco Technology, Inc.
Inventor： Satya Ranjan Mohanty , Mankamana Prasad Mishra , Ali Sajassi , Mrinmoy Ghosh
IPC: H04L43/0882 , H04L12/66 , H04L49/25 , H04L12/18 , H04L12/46 , H04L69/326
Abstract: In one embodiment, a method includes receiving, by a first router, data from a network component. The method also includes determining, by the first router, a first link bandwidth capacity between the first router and a host device and determining, by the first router, a first score for the first router based on the first link bandwidth capacity, The method also includes determining, by the first router, a second link bandwidth capacity between a second router and the host device and determining, by the first router, a second score for the second router based on the second link bandwidth capacity. The method further includes comparing, by the first router, at least the first score and the second score to determine a highest score and assigning, by the first router, an edge router associated with the highest score to communicate the data to the host device.
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