公开(公告)号：US10862697B2

公开(公告)日：2020-12-08

申请号：US16293447

申请日：2019-03-05

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Samir Thoria ,  Ijsbrand Wijnands ,  Lester C Ginsberg

IPC: H04L12/18 ,  H04L12/46 ,  H04L12/751 ,  H04L12/721 ,  H04L12/801

Abstract: Systems, methods, and computer-readable media for controlling multicast traffic flows through provider edge routers. In some examples, a multicast traffic of one or more multicast traffic flows is received from a multicast source at a first provider edge router of a plurality of provider edge routers. A multicast routing message including a loopback address of the first provider edge router can be originated at the first provider edge router. The multicast routing message can be flooded into a multicast core network for controlling traffic in the one or more multicast flows through the multicast core network to the first provider edge router. Subsequently, multicast joins can be received at the first provider edge router for establishing the one or more multicast flows through the multicast core network based on the multicast routing message including the loopback address of the first provider edge router.

公开(公告)号：US10432757B1

公开(公告)日：2019-10-01

申请号：US16046133

申请日：2018-07-26

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Samir Thoria ,  Ravindra Nandalal Rathi ,  Keyur Patel ,  Derek Man-Kit Yeung

IPC: H04L12/28 ,  H04L29/06 ,  H04L12/46 ,  H04L12/18 ,  H04L12/723

Abstract: Message summarization and flood suppression may be provided. A proxy (e.g., an IGMP Proxy) process may be used to reduce the flooding of messages (e.g., IGMP messages) over a network (e.g., an EVPN network). A triggering process may also be provided for provider edge (PE) devices to setup their underlay multicast tunnels. The proxy may comprise two components: i) a proxy for reports (e.g., IGMP reports); and ii) a proxy for queries (e.g., IGMP Queries).

公开(公告)号：US20250126045A1

公开(公告)日：2025-04-17

申请号：US18485110

申请日：2023-10-11

Applicant: Cisco Technology, Inc.

Inventor： Balaji Sundararajan ,  Michael Moskal ,  Satish Kumar Mahadevan ,  Vivek Agarwal ,  Pradeep Kanavihalli Subramanyasetty ,  Prabahar Radhakrishnan ,  Samir Thoria ,  Pritam Baruah ,  Samantha Misra ,  Shailendra Vinod Pardeshi

IPC: H04L45/02 ,  H04L45/122

Abstract: A process can include determining affinity information indicative of route preferences between branch routers and gateway routers. A prefix can be determined for a subnet of branch routers located at a same branch location. An affinity position of a first gateway router can be determined based on affinity information of the branch routers in the subnet. A mapping can be determined between a local preference Border Gateway Protocol (BGP) community attribute and the affinity position of the first gateway router, wherein a mapped local preference BGP community attribute and the affinity position are indicative of a same routing preference. The mapped local preference BGP community attribute can be attached to routes from the first gateway router into a cloud service provider. Affinity-based route preferences are indicated to the cloud service provider by redistributing the routes from the first gateway router with the mapped local preference BGP community attribute attached.

公开(公告)号：US20240430227A1

公开(公告)日：2024-12-26

申请号：US18826319

申请日：2024-09-06

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Samir Thoria ,  Lukas Krattiger ,  Manoj Kumar Pandey

IPC: H04L61/5053 ,  H04L9/40 ,  H04L61/5014 ,  H04L101/622

Abstract: Systems and techniques are provided for synchronizing DHCP snoop information. In some examples, a method can include, performing, by a first PE device from a plurality of PE devices, DHCP snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the plurality of PE devices is part of an ethernet segment for multihoming the DHCP client. In some aspects, the method includes determining, based on snooping the first plurality of DHCP messages, an association between an IP address corresponding to the DHCP client and a MAC address corresponding to the DHCP client. In some examples, the method includes sending, by the first PE device to at least one other PE device from the plurality of PE devices, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client.

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

IPC: H04L12/46 ,  H04L45/18

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.

公开(公告)号：US11917262B2

公开(公告)日：2024-02-27

申请号：US17751112

申请日：2022-05-23

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Samir Thoria ,  Tapraj Singh ,  Mankamana Prasad Mishra

IPC: G06F15/16 ,  H04L12/46 ,  H04L65/611 ,  H04N21/222 ,  H04N21/24 ,  H04N21/6405 ,  H04W8/00

CPC classification number: H04N21/6405 ,  H04L12/4641 ,  H04L65/611 ,  H04N21/222 ,  H04N21/2402 ,  H04N21/2405 ,  H04W8/005

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.

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

IPC: H04L12/18 ,  H04L45/50

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.

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

IPC: H04L45/50 ,  H04L45/00 ,  H04L45/02 ,  H04L12/46

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.

公开(公告)号：US20230261981A1

公开(公告)日：2023-08-17

申请号：US18303493

申请日：2023-04-19

Applicant: Cisco Technology, Inc.

Inventor： Anubhav Gupta ,  Rex Fernando ,  Sanjay Kumar Hooda ,  Syam Sundar Appala ,  Samir Thoria

IPC: H04L45/302 ,  H04L12/28 ,  H04L45/74 ,  H04L47/20

CPC classification number: H04L45/302 ,  H04L12/2854 ,  H04L45/74 ,  H04L47/20

Abstract: In one embodiment, a method by an edge router configured to operate at a first site of a software-defined wide-area network includes receiving a data packet from a first host located in the first site, where the data packet is destined to a second host located in a second site, determining that an identifier of a second group to which the second host belongs is not available at the edge router, sending a request for an identifier of the second group to a network apparatus, where the request may comprise an address of the second host, receiving a response comprising the identifier of the second group from the network apparatus, determining that the second group is a destination group, applying one or more policies associated with the destination group to the data packet, and causing the data packet to be routed to the second host.

公开(公告)号：US20230090072A1

公开(公告)日：2023-03-23

申请号：US18052254

申请日：2022-11-03

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Samir Thoria ,  Krishnaswamy Ananthamurthy ,  Stig Ingvar Venaas

IPC: H04L12/18 ,  H04L12/46 ,  H04L45/16 ,  H04L67/2895

Abstract: In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.