公开(公告)号：US12052168B2

公开(公告)日：2024-07-30

申请号：US17301354

申请日：2021-03-31

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang ,  Shraddha Hegde ,  Srihari Ramachandra Sangli ,  Kaliraj Vairavakkalai

IPC: H04L45/50 ,  H04L12/46 ,  H04L45/02 ,  H04L45/24 ,  H04L45/44 ,  H04L45/74

CPC classification number: H04L45/507 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/24 ,  H04L45/44 ,  H04L45/74

Abstract: Techniques are described for using route target constraint to filter routes advertised to a node in a seamless Multiprotocol Label Switching (MPLS) network. For example, a first router of a first network may generate a first border gateway protocol (BGP) message to advertise routing information for a first node of the first network, the first BGP message indicating a transport class and specifying an address-specific route target, the transport class comprising one or more tunnels to the first node that share common characteristics. In response to receiving a second BGP message originated by second node of a second network, the second BGP message comprising the address-specific route target, the first router sends the first BGP message to a second router of the second network for sending to the second node to cause the second node to import the routing information.

公开(公告)号：US20190386837A1

公开(公告)日：2019-12-19

申请号：US16122371

申请日：2018-09-05

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang

IPC: H04L12/18 ,  H04L12/46 ,  H04L29/06 ,  H04L12/741 ,  H04L12/723

Abstract: A bit indexed explicit replication (BIER) network device may receive, from a first network device, information associated with a BIER proxy device that is associated with the first network device, and may transmit, to the BIER proxy device and based on receiving the information, a BIER-encapsulated multicast packet via a first tunnel between the BIER network device and the BIER proxy device. The BIER proxy device may be to transmit, via a second tunnel through the first network device, a first copy of the BIER-encapsulated multicast packet to a second network device.

公开(公告)号：US20190229937A1

公开(公告)日：2019-07-25

申请号：US15880370

申请日：2018-01-25

Applicant: Juniper Networks, Inc.

Inventor： Vikram Nagarajan ,  Zhaohui Zhang ,  Princy T. Elizabeth ,  Ragupathi J

IPC: H04L12/18 ,  H04L12/721 ,  H04L29/08 ,  H04L12/46

CPC classification number: H04L12/18 ,  H04L12/1886 ,  H04L12/4641 ,  H04L45/12 ,  H04L69/324

Abstract: In some examples, a method includes receiving, by a first provider edge (PE) device of a layer 3 network, configuration data configuring the PE device to provide, via an Ethernet segment with an edge device, active-active multi-homing layer 2 (L2) virtual bridge connectivity to the edge device using an Ethernet Virtual Private Network (EVPN) instance; receiving, by the first PE device, a multicast Join message for multicast traffic, the multicast Join message identifying a second PE device that also participates in the EVPN instance; processing, by the first PE device, the multicast Join message to generate multicast forwarding state; and forwarding, by the first PE device based at least on the multicast forwarding state, the multicast traffic.

公开(公告)号：US10182007B2

公开(公告)日：2019-01-15

申请号：US15473945

申请日：2017-03-30

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang

IPC: H04L12/723 ,  H04L12/18 ,  H04L12/741 ,  H04L12/66

Abstract: The disclosed computer-implemented method may include (1) receiving, at an upstream router of a multicast distribution tree, a packet that is destined for a receiver within an MPLS network, (2) identifying within the packet (A) a context label that specifies a controller and (B) a tree label that is assigned by the controller, (3) identifying a forwarding table that corresponds to the context label identified within the packet, (4) searching the forwarding table that corresponds to the context label for the tree label that specifies the multicast distribution tree, (5) identifying, based at least in part on the search, a downstream router of the multicast distribution tree that is to receive the packet on the way to the receiver, and then (6) forwarding the packet to the downstream router of the multicast distribution tree on the way to the receiver. Various other methods, systems, and apparatuses are also disclosed.

公开(公告)号：US09705784B2

公开(公告)日：2017-07-11

申请号：US14753313

申请日：2015-06-29

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang ,  Alex Baban

IPC: H04L12/761 ,  H04L12/935 ,  H04L12/931

CPC classification number: H04L45/16 ,  H04L49/201 ,  H04L49/30 ,  H04L49/3009

Abstract: A network device receives multicast packets that include information identifying destinations in the network, identifies next hops associated with the destinations, and populates a cache with the destinations and addresses of the identified next hops. The network device receives a particular multicast packet that includes information identifying particular destinations included in the cache, identifies one or more next hops for the particular destinations from the cache, and forwards the particular multicast packet to the identified one or more next hops to permit the identified one or more next hops to forward the multicast packet toward the particular destinations.

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：US09444721B2

公开(公告)日：2016-09-13

申请号：US14042644

申请日：2013-09-30

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang ,  Lili Wang

IPC: H04L12/28 ,  H04L12/721 ,  H04W40/24 ,  H04L12/751

CPC classification number: H04L45/12 ,  H04L45/02 ,  H04W40/246 ,  H04W40/248

Abstract: Techniques are described for utilizing two-part metrics with link state routing protocols of computer networks. For example, link state advertisements communicated by a router convey outbound cost metrics representative of outbound costs for the router to send network traffic to a network, and inbound cost metrics representative of inbound costs to receive network traffic from the network. The techniques may be particularly useful with respect to shared access networks, including broadcast or non-broadcast multi-access networks.

Abstract translation: 描述了利用计算机网络的链路状态路由协议的两部分度量的技术。 例如，由路由器传送的链路状态广告传递表示路由器向网络发送网络流量的出站成本的出站成本度量，以及表示从网络接收网络流量的入站成本的入站成本指标。 对于包括广播或非广播多接入网络的共享接入网络，这些技术可能是特别有用的。

公开(公告)号：US20240235999A1

公开(公告)日：2024-07-11

申请号：US18095252

申请日：2023-01-10

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang ,  SelvaKumar Sivaraj ,  Pavana C V ,  M Ganesh Prasad

IPC: H04L45/76 ,  H04L12/46 ,  H04L45/02

CPC classification number: H04L45/76 ,  H04L12/4641 ,  H04L45/02

Abstract: In an Ethernet Virtual Private Network (EVPN) with a multi-homed Ethernet Segment (MHES), potential problems of core isolation are avoided in a way that also avoids the potential “split brain” problems.

公开(公告)号：US10567181B2

公开(公告)日：2020-02-18

申请号：US16024360

申请日：2018-06-29

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang

IPC: H04L12/28 ,  H04L12/18 ,  H04L12/931 ,  H04L12/723 ,  H04L29/06

Abstract: A network device may receive, from a first neighbor network device, information indicating that the network device is to remove a bit indexed explicit replication (BIER) header from a multicast packet prior to transmitting the multicast packet to the first neighbor network device. The network device may receive the multicast packet from a second neighbor network device, where the multicast packet includes the BIER header and is to be transmitted to the first neighbor network device, and where the network device, the first neighbor network device, and the second neighbor network device are included in a same BIER domain. The network device may remove the BIER header from the multicast packet, and may transmit the multicast packet to the first neighbor network device after removing the BIER header from the multicast packet.

公开(公告)号：US20190386838A1

公开(公告)日：2019-12-19

申请号：US16159081

申请日：2018-10-12

Applicant: Juniper Networks, Inc.

Inventor： Zhaohui Zhang

IPC: H04L12/18

Abstract: A bit indexed explicit replication (BIER) network device may receive information indicating that a BIER proxy device is a BIER proxy for a first network device, and may transmit, to the BIER proxy device and based on receiving the information, a BIER-encapsulated multicast packet via a first tunnel between the BIER network device and the BIER proxy device. The BIER proxy device may be to transmit, via a second tunnel through the first network device, a first copy of the BIER-encapsulated multicast packet to a second network device.