公开(公告)号：US10476792B2

公开(公告)日：2019-11-12

申请号：US15932198

申请日：2018-02-16

Applicant: Juniper Networks, Inc.

Inventor： Selvakumar Sivaraj ,  Wen Lin ,  Ravi Shekhar ,  Vasudevan Venkatraman

IPC: H04L12/721 ,  H04L29/12 ,  H04W48/16

Abstract: A device may receive, via a first message, first route information for directing network traffic for a network. The first route information may identify a media access control (MAC) route corresponding to a MAC address associated with a host device connecting to a subnet of the network. The first route information may fail to include Internet protocol (IP)/MAC binding information associated with the host device. The device may transmit a request for IP/MAC binding information associated with the host device. The device may receive a response, to the request for IP/MAC binding information, identifying the IP/MAC binding information. The device may advertise, via a second message, second route information for directing network traffic for the network based on receiving the response identifying the IP/MAC binding information. The second route information may identify the IP/MAC binding information associated with the host device.

公开(公告)号：US20190305988A1

公开(公告)日：2019-10-03

申请号：US15942177

申请日：2018-03-30

Applicant: Juniper Networks, Inc.

Inventor： Ryan Bickhart ,  Wen Lin

IPC: H04L12/46 ,  H04L12/723 ,  H04L12/24 ,  H04L12/721 ,  H04L12/751 ,  H04L29/06

Abstract: For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE1 and PE2), the potential problem of one of the at least two provider edge devices (PE2) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE3), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE2, whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE2, an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE3), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE2, an A-D/EVI route advertisement (or an A-D/ESI route advertisement).

公开(公告)号：US20180287990A1

公开(公告)日：2018-10-04

申请号：US15997214

申请日：2018-06-04

Applicant: Juniper Networks, Inc.

Inventor： Ryan Bickhart ,  Nitin Singh ,  Wen Lin ,  Hassan C. Hosseini

IPC: H04L29/12 ,  H04L12/46 ,  H04L12/721 ,  H04L12/751 ,  H04L12/723 ,  H04L12/66

Abstract: A network device is configured to provide, via an Ethernet segment with a customer network, active-active multi-homing L2 virtual bridge connectivity to the customer network using an EVPN instance (EVI) and L3 routing using an IRB interface that is a L3 routing interface assigned to the EVI; to receive, from a peer PE device of the EVPN instance, an EVPN route comprising an L2-L3 binding for a customer device of the customer network and associating the L2-L3 binding with the Ethernet segment, the L2-L3 binding comprising an L2 and an L3 address assigned to the customer device, wherein the peer PE device provides, with the network device and via the Ethernet segment, active-active multi-homing L2 virtual bridge connectivity to the customer network; and to forward, via the Ethernet segment and based at least on the L2-L3 binding received from the peer PE device, an L3 packet to the customer device.

公开(公告)号：US20180287946A1

公开(公告)日：2018-10-04

申请号：US15655210

申请日：2017-07-20

Applicant: Juniper Networks, Inc.

Inventor： Vikram Nagarajan ,  Wen Lin ,  Robert W. Kebler ,  Princy T. Elizabeth ,  Kapil Arora

IPC: H04L12/801 ,  H04L29/06 ,  G06F9/54

CPC classification number: H04L47/15 ,  G06F9/542 ,  H04L12/18 ,  H04L47/125 ,  H04L63/0272 ,  H04L65/4076

Abstract: In general, techniques are described for load-balancing responsibility for forwarding of multicast traffic into an active-active Ethernet segment between two or more multi-homed provider edge (PE) routers in an Ethernet Virtual Private Network (EVPN). In one example, a PE router may receive an Internet Group Management Protocol (IGMP) join report for a multicast group. The PE router may send join synch routes used to synchronize the join report for the multicast group across the Ethernet segment. The PE router may deterministically determine whether the PE router is configured to be an elected multicast forwarder for one of a plurality of multicast groups. If the PE router is elected a multicast forwarder, the PE router may configure a forwarding state of the PE router to ignore a designated forwarder calculation and to forward the multicast traffic into the Ethernet segment regardless of whether the PE router is a designated forwarder.

公开(公告)号：US20160277210A1

公开(公告)日：2016-09-22

申请号：US14675202

申请日：2015-03-31

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  John E. Drake ,  Zhaohui Zhang

IPC: H04L12/46 ,  H04L12/761 ,  H04L12/721

CPC classification number: H04L12/4625 ,  H04L12/1886 ,  H04L12/4641 ,  H04L45/16 ,  H04L45/66

Abstract: The techniques of this disclosure may improve multicast forwarding in an Ethernet Virtual Private Network when delivering multicast traffic to receivers on a different IP subnet than the multicast source. A method may include configuring first and second layer-2 domains to forward network traffic; configuring a first layer-3 Integrated Routing and Bridging (IRB) interface for the first layer-2 domain and a second layer-3 IRB interface for the second layer 2 domain; receiving a multicast packet from a multicast source device, the multicast source device being included in the first layer-2 domain, the multicast packet having a multicast receiver device in the second layer-2 domain; and forwarding, using the first and second layer-3 IRB interfaces, the multicast packet to the multicast receiver device, without receiving the multicast packet from another provider edge router that has been elected as the designated router on the second IRB interface for the second layer-2 domain.

Abstract translation: 本发明的技术可以改善以太网虚拟专用网络中的多播转发，以将多播流量递送到与多播源不同的IP子网上的接收机。 一种方法可以包括配置第一和第二层2域以转发网络业务; 为第一层2域配置第一层3集成路由和桥接（IRB）接口，为第二层2域配置第二层-3 IRB接口; 从组播源设备接收组播报文，组播源设备包含在第一层2域中，组播报文具有第二层2域中的组播接收设备; 并且使用第一和第二三层IRB接口将组播分组转发到多播接收机设备，而不从另一个提供者边缘路由器接收到来自第二层的第二IRB接口上的指定路由器的组播分组 -2域。

公开(公告)号：US09391885B1

公开(公告)日：2016-07-12

申请号：US14019387

申请日：2013-09-05

Applicant: Juniper Networks, Inc.

Inventor： Pankaj Shukla ,  Wen Lin ,  Satya Ranjan Mohanty ,  John E. Drake

IPC: H04L12/723 ,  H04L12/721

CPC classification number: H04L45/66 ,  H04L45/50

Abstract: In general, techniques are described for configuring a provider edge (PE) network device of an Ethernet virtual private network (EVPN) to use a common traffic engineering label (e.g., MPLS label) for different EVPN route types associated with the same EVPN. In some examples, the techniques include sending a first layer three (L3) control plane message that indicates a label-switched network protocol label that corresponds to a first EVPN route type, wherein the first L3 control plane message indicates that a first PE network device is reachable in the L2 segment. The techniques may include performing L2 address learning to determine at least one L2 address associated with the layer two segment of the EVPN. The techniques may include sending a second L3 control plane message that indicates the same label included in the first L3 control plane message corresponds to a second EVPN route type.

Abstract translation: 一般来说，描述了用于配置以太网虚拟专用网（EVPN）的提供商边缘（PE）网络设备以对与相同EVPN相关联的不同EVPN路由类型使用公共流量工程标签（例如，MPLS标签）的技术。 在一些示例中，所述技术包括：发送指示对应于第一EVPN路由类型的标签交换网络协议标签的第一层三（L3）控制平面消息，其中所述第一L3控制平面消息指示第一PE网络设备 在L2段可达。 这些技术可以包括执行L2地址学习以确定与EVPN的第二层段相关联的至少一个L2地址。 这些技术可以包括发送指示包括在第一L3控制平面消息中的相同标签对应于第二EVPN路由类型的第二L3控制平面消息。

公开(公告)号：US11677586B1

公开(公告)日：2023-06-13

申请号：US17443500

申请日：2021-07-27

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Ravi Shekhar ,  Vamshi Krishna Voruganti ,  Aldrin Isaac ,  SelvaKumar Sivaraj ,  Sean A. Mentzer ,  John E. Drake

IPC: H04L12/46 ,  H04L45/50 ,  H04L12/66 ,  H04L61/5007 ,  H04L101/622

CPC classification number: H04L12/4641 ,  H04L12/66 ,  H04L45/50 ,  H04L61/5007 ,  H04L2101/622

Abstract: A first provider edge device may receive device information from a second provider edge device included in an Ethernet virtual private network (EVPN). The device information may identify a media access control (MAC) address and may indicate that the device is connected to the second provider edge device. The first provider edge device may receive data transmitted by the device and may determine, based on information included in the data, that the device has moved from the second provider edge device to the first provider edge device. The first provider edge device may generate a data packet including mobility information indicating that the device has moved to the first provider edge device. The first provider edge device may transmit, via a data plane of the EVPN, the data packet to the second provider edge device to permit the second provider edge device to update routing information for the device.

公开(公告)号：US11570086B2

公开(公告)日：2023-01-31

申请号：US17249163

申请日：2021-02-22

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  John E. Drake

IPC: H04L45/16 ,  H04L45/02 ,  H04L45/00 ,  H04L45/50 ,  H04L47/32

Abstract: Techniques are described for providing fast reroute for BUM traffic in EVPN. For example, a first provider edge (PE) device, elected as a designated forwarder (DF) of an Ethernet segment, configures a backup path using a label received from a second PE device of the Ethernet segment (e.g., backup DF) that identifies the second PE device as a “protector” of the Ethernet segment. For example, a routing component of the DF configures within a forwarding component a backup path to the second PE device, e.g., installing the label and operation(s) within the forwarding component to cause the forwarding component to add the label to BUM packets received from a core network. Therefore, when an access link to the local CE device has failed, the DF reroutes BUM packets from the core network via the backup path to the second PE device, which sends the BUM packets to the CE device.

公开(公告)号：US20220321458A1

公开(公告)日：2022-10-06

申请号：US17301351

申请日：2021-03-31

Applicant: Juniper Networks, Inc.

Inventor： Wen Lin ,  Yi Zheng ,  Mukesh Kumar ,  Xichun Hong ,  SelvaKumar Sivaraj ,  Vamshi Krishna Voruganti ,  John E. Drake

IPC: H04L12/703 ,  H04L12/46 ,  H04L12/24

Abstract: Techniques are described for providing fast reroute for traffic in EVPN-VXLAN. For example, a backup PE device of an Ethernet segment is configured with an additional tunnel endpoint address (“reroute tunnel endpoint address”) for a backup path associated with a second split-horizon group that is different than a tunnel endpoint address and first split-horizon group for another path used for normal traffic forwarding. The backup PE device sends the reroute tunnel endpoint address to a primary PE device of the Ethernet segment, which uses the reroute tunnel endpoint address to configure a backup path to the backup PE device over the core network. For example, the primary PE device may install the reroute tunnel endpoint address within its forwarding plane and one or more operations to cause the primary PE device to encapsulate a VXLAN header including the reroute tunnel endpoint address when rerouting the packet along the backup path.

公开(公告)号：US11057243B2

公开(公告)日：2021-07-06

申请号：US16812295

申请日：2020-03-07

Applicant: Juniper Networks, Inc.

Inventor： Ryan Bickhart ,  Wen Lin

IPC: H04L29/06 ,  H04L12/46 ,  H04L12/24 ,  H04L12/751 ,  H04L12/723 ,  H04L12/721 ,  H04N21/81 ,  H04L29/12 ,  H04L12/913 ,  H04N21/458 ,  H04M3/487

Abstract: For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE1 and PE2), the potential problem of one of the at least two provider edge devices (PE2) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE3), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE2, whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE2, an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE3), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE2, an A-D/EVI route advertisement (or an A-D/ESI route advertisement).