公开(公告)号：US09225640B2

公开(公告)日：2015-12-29

申请号：US14019728

申请日：2013-09-06

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Keyur Patel ,  Chandrashekhar Appanna ,  Stefano Previdi

IPC: H04L12/28 ,  H04L12/741 ,  H04L12/751 ,  H04L12/715 ,  H04L12/723

CPC classification number: H04L45/745 ,  H04L45/02 ,  H04L45/04 ,  H04L45/50

Abstract: In one embodiment, a method includes receiving, by a first autonomous system border router (ASBR) of a first autonomous system (AS), a first plurality of provider-provisioned media access control (B-MAC) addresses via Interior Border Gateway Protocol (I-BGP). Each of first plurality of B-MAC addresses is associated with a provider edge (PE) device of the first AS. The first ASBR sends the first plurality of B-MAC addresses to a second ASBR of a second AS using Exterior Border Gateway Protocol (E-BGP). The first ASBR also receives via E-BGP a second plurality of B-MAC addresses each of which is associated with a PE device of the second AS. The first ASBR then distributes the second plurality of B-MAC addresses to each of the PE devices of the first AS using I-BGP.

公开(公告)号：US09148290B2

公开(公告)日：2015-09-29

申请号：US13930680

申请日：2013-06-28

Applicant: Cisco Technology, Inc.

Inventor： Samer Salam ,  Ali Sajassi ,  Ayan Banerjee ,  Sami Boutros

IPC: H04L12/28 ,  H04L12/18

CPC classification number: H04L12/1836

Abstract: In one embodiment, a particular PE device of a plurality of multi-homing PE devices between a core network and a local network determines a subset of traffic for which the particular PE device is responsible. The particular PE also establishes, with itself as root, a multicast tree within the local network for underlay multicast groups. Traffic received at the particular PE from the core network is admitted into the local network only if the core traffic corresponds to the subset of traffic for which the particular PE device is responsible (and mapped into one of the underlay multicast groups for which the particular PE device is the root). Also, multicast traffic received at the particular PE from the local network is forwarded into the core network only if the multicast traffic corresponds to the subset of traffic for which the particular PE device is responsible.

Abstract translation: 在一个实施例中，核心网络和本地网络之间的多个多归属PE设备的特定PE设备确定特定PE设备负责的流量子集。 特定的PE还以本身为根建立本地网络内的组播树，用于底层组播组。 只有当核心流量对应于特定PE设备负责的流量子集（并映射到特定PE的底层多播组中的一个）时，才从核心网络在特定PE处接收的流量被允许进入本地网络 设备是根）。 此外，仅当组播流量对应于特定PE设备所负责的业务子集时，才将来自本地网络的特定PE处接收到的组播流量转发到核心网络。

公开(公告)号：US09049133B2

公开(公告)日：2015-06-02

申请号：US13927350

申请日：2013-06-26

Applicant: Cisco Technology, Inc.

Inventor： Sami Boutros ,  Ali Sajassi ,  Samer Salam

IPC: G06F15/173 ,  H04L12/721

CPC classification number: H04L45/14 ,  H04L12/4641 ,  H04L45/04

Abstract: In one embodiment, one or more point-to-point (P2P) services are established between attachment circuits on provider edge (PE) devices in a computer network, and each of the one or more P2P services (e.g., Virtual Private Wire Service, VPWS) are associated with an Ethernet virtual private network (E-VPN) Ethernet Auto-Discovery (A-D) route, where links between the PE devices and customer edge (CE) devices are configured as Ethernet interfaces with Ethernet tagging. As such, the Ethernet A-D route may then be exchanged for each P2P service attachment circuit, and forwarding can be performed on the one or more P2P services without performing a media access control (MAC) address lookup and without performing MAC learning.

Abstract translation: 在一个实施例中，在计算机网络中的提供商边缘（PE）设备上的附接电路之间建立一个或多个点对点（P2P）服务，并且所述一个或多个P2P服务（例如，虚拟专线服务， VPWS）与以太网虚拟专用网（E-VPN）以太网自动发现（AD）路由相关联，其中PE设备和客户端（CE）设备之间的链路被配置为具有以太网标记的以太网接口。 因此，可以为每个P2P服务附接电路交换以太网A-D路由，并且可以在一个或多个P2P服务上执行转发，而不执行媒体访问控制（MAC）地址查找，而不执行MAC学习。

公开(公告)号：US20140169376A1

公开(公告)日：2014-06-19

申请号：US14185636

申请日：2014-02-20

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Norman Finn ,  Francois Tallet

IPC: H04L12/741

CPC classification number: H04L45/745 ,  H04L1/00 ,  H04L12/462 ,  H04L12/4641 ,  H04L45/18

Abstract: A technique is provided for mitigating loops in Ethernet networks. A first port in an Ethernet device receives an Ethernet frame. The frame includes a source identifier, a destination identifier, and a Virtual Local Area Network Identifier (VLAN ID). According to various embodiments, the VLAN ID (VID) has the encoding of both a community group as well as a source bridge ID. A VID database is accessed using the destination identifier and the VID to determine whether the first port has ingress enabled. A filtering database is accessed to determine an egress port for forwarding the Ethernet frame.

Abstract translation: 提供了一种减轻以太网网络环路的技术。 以太网设备中的第一个端口接收以太网帧。 该帧包括源标识符，目的地标识符和虚拟局域网标识符（VLAN ID）。 根据各种实施例，VLAN ID（VID）具有社区组以及源网桥ID的编码。 使用目标标识符和VID访问VID数据库，以确定第一个端口是否启用了入口。 访问过滤数据库以确定用于转发以太网帧的出口端口。

公开(公告)号：US12149440B2

公开(公告)日：2024-11-19

申请号：US18183730

申请日：2023-03-14

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Nitin Kumar

IPC: H04L45/00 ,  H04L12/18 ,  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.

公开(公告)号：US12113640B2

公开(公告)日：2024-10-08

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 ,  H04L1/00 ,  H04L45/16

CPC classification number: H04L12/1859 ,  H04L12/185 ,  H04L12/1895 ,  H04L45/50 ,  H04L2001/0093 ,  H04L45/16

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：US11985002B2

公开(公告)日：2024-05-14

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

CPC classification number: H04L12/185 ,  H04L12/1886 ,  H04L12/4679 ,  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.

公开(公告)号：US20240039897A1

公开(公告)日：2024-02-01

申请号：US18146342

申请日：2022-12-23

Applicant: Cisco Technology, Inc.

Inventor： Sri Gundavelli ,  Eric A. Voit ,  Pradeep K. Kathail ,  Ali Sajassi ,  David Maluf

IPC: H04L9/40

CPC classification number: H04L63/0414 ,  H04L63/166 ,  H04L63/0435

Abstract: In one aspect, a method of IP obfuscation of a user device includes receiving, over an Extendible Authentication Protocol (EAP) session between a user device and a network access point, location preferences of the user device, generating, based on the location preferences or a network policy, a geohash for the user device, identifying, for the user device, an IP anchor, sending, over the EAP session, the geohash to the user device, and receiving, from the user device, network traffic, wherein the network access point utilizes the geohash and the IP anchor to route the network traffic for the user device and obfuscate IP address of the user device from third-party access.

公开(公告)号：US11811546B2

公开(公告)日：2023-11-07

申请号：US17472774

申请日：2021-09-13

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Krishnaswamy Muddenahally Ananthamurthy ,  Jayashree Subramanian

IPC: H04L12/18 ,  H04L12/46 ,  H04L9/40 ,  H04L45/74 ,  H04L47/724 ,  H04L45/16

CPC classification number: H04L12/185 ,  H04L12/4641 ,  H04L45/16 ,  H04L45/74 ,  H04L47/724 ,  H04L63/0272

Abstract: A networking environment includes a first node and a second node configured as Ethernet Virtual Private Networking (EVPN) peers on an EVPN subnet that is coupled to a Layer 3 VPN over a core network. The first node receives a first multicast join request from a third node in the core network, the first multicast join request including a source address and multicast group address of a source of a multicast stream. The first node determines that the source address and the multicast group address for the source are behind the EVPN subnet at the second node. The first node sends to the second node, a control plane join request message that includes a receiver identifier that identifies the third node as a receiver of the multicast stream, the receiver identifier enabling the second node to forward the multicast stream directly into the core network to the third node.

公开(公告)号：US20230269223A1

公开(公告)日：2023-08-24

申请号：US17677599

申请日：2022-02-22

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Jerome Tollet ,  Ali Sajassi ,  Aloÿs Christophe Augustin ,  Nathan Roland Maryan Skrzypczak ,  Stephane Litkowski

IPC: H04L61/5092 ,  H04L61/5061

CPC classification number: H04L61/2092 ,  H04L61/2061 ,  H04L61/6086

Abstract: Systems, methods, and computer-readable media are provided for securely advertising autoconfigured prefixes in a cloud environment. In some examples, a method can include, receiving, by a first router, an indication of an available network address prefix. In some aspects, the method can also include selecting, by the first router, a first network address prefix that is within the available network address prefix, wherein the first network address prefix provides at least one route to one or more network elements associated with the first router. In some cases, the method may further include sending, to a second router, a message including a stub registration option that indicates the first network address prefix.