公开(公告)号：US09742668B1

公开(公告)日：2017-08-22

申请号：US14822507

申请日：2015-08-10

Applicant: Juniper Networks, Inc.

Inventor： Scott Mackie ,  James Washburn ,  Nitin Kumar ,  Sandeep Bajaj

IPC: H04L12/721 ,  H04L12/771 ,  H04L12/773

CPC classification number: H04L45/44 ,  H04L29/06 ,  H04L29/08072 ,  H04L45/00 ,  H04L45/56 ,  H04L45/60

Abstract: In general, this disclosure describes a high-level forwarding path description language (FPDL) for describing internal forwarding paths within a network device. The FPDL enables developers to create a template that describes a section of an internal forwarding path within the forwarding plane of a network device. The FPDL provides syntactical elements for specifying the allocation of forwarding path structures as well as enabling the run-time construction of internal forwarding paths to interconnect the forwarding path structures in a manner specific to packet, packet flow, and/or interface properties, for example. In conjunction with late binding techniques, whereby the control plane of the network device provides arguments to template parameters that drive allocation by the packet forwarding engines of forwarding path structures specified by the FPDL, the techniques provide control plane processes a unified interface with which to manage the operation of the packet forwarding engines.

公开(公告)号：US09258227B2

公开(公告)日：2016-02-09

申请号：US13969902

申请日：2013-08-19

Applicant: JUNIPER NETWORKS, INC.

Inventor： Kaushik Ghosh ,  Kireeti Kompella ,  Siva Gaggara ,  Nitin Kumar ,  Steven Lin

IPC: H04L12/741 ,  H04L12/46 ,  H04L12/751 ,  H04L12/723

CPC classification number: H04L45/745 ,  H04L12/4633 ,  H04L45/02 ,  H04L45/50

Abstract: A route for a data unit through a network may be defined based on a number of next hops. Exemplary embodiments described herein may implement a router forwarding table as a chained list of references to next hops. In one implementation, a device includes a forwarding table that includes: a first table configured to store, for each of a plurality of routes for data units in a network, a chain of links to next hops for the routes; and a second table configured to store the next hops. The device also includes a forwarding engine configured to assemble the next hops for the data units based on using the chain of links in the first table to retrieve the next hops in the second table and to forward the data units in the network based on the assembled next hops.

公开(公告)号：US09106581B1

公开(公告)日：2015-08-11

申请号：US14456928

申请日：2014-08-11

Applicant: Juniper Networks, Inc.

Inventor： Scott Mackie ,  James Washburn ,  Nitin Kumar ,  Sandeep Bajaj

IPC: G06F15/17 ,  H04L12/721 ,  H04L29/06 ,  H04L29/08

CPC classification number: H04L45/44 ,  H04L29/06 ,  H04L29/08072 ,  H04L45/00 ,  H04L45/56 ,  H04L45/60

Abstract: In general, this disclosure describes a high-level forwarding path description language (FPDL) for describing internal forwarding paths within a network device. The FPDL enables developers to create a template that describes a section of an internal forwarding path within the forwarding plane of a network device. The FPDL provides syntactical elements for specifying the allocation of forwarding path structures as well as enabling the run-time construction of internal forwarding paths to interconnect the forwarding path structures in a manner specific to packet, packet flow, and/or interface properties, for example. In conjunction with late binding techniques, whereby the control plane of the network device provides arguments to template parameters that drive allocation by the packet forwarding engines of forwarding path structures specified by the FPDL, the techniques provide control plane processes a unified interface with which to manage the operation of the packet forwarding engines.

Abstract translation: 通常，本公开描述了用于描述网络设备内的内部转发路径的高级转发路径描述语言（FPDL）。 FPDL使开发人员能够创建一个描述网络设备转发平面内部转发路径部分的模板。 FPDL提供用于指定转发路径结构的分配的语法元素，以及启用内部转发路径的运行时构造以特定于分组，分组流和/或接口属性的方式互连转发路径结构，例如 。 结合后期绑定技术，由此网络设备的控制平面为模型参数提供参数，以驱动分组转发引擎对由FPDL指定的转发路径结构的分配，这些技术为控制平面处理提供统一的接口，用于管理 分组转发引擎的操作。

公开(公告)号：US08873554B2

公开(公告)日：2014-10-28

申请号：US13692701

申请日：2012-12-03

Applicant: Juniper Networks, Inc.

Inventor： Alex Baban ,  Jean-Marc Frailong ,  Kireeti Kompella ,  Nitin Kumar ,  Jamsheed Wania ,  Murtuza Attarwala

IPC: H04L12/56 ,  H04J3/26 ,  H04L12/18 ,  H04L12/931 ,  H04L12/933 ,  H04L12/761

CPC classification number: H04L12/18 ,  H04L45/16 ,  H04L49/10 ,  H04L49/201

Abstract: A network device receives a packet with a multicast nexthop identifier, and creates a mask that includes addresses of egress packet forwarding engines, of the network device, to which to provide the packet. The network device divides the mask into two portions, generates two copies of the packet, provides a first portion of the mask in a first copy of the packet, and provides a second portion of the mask in a second copy of the packet. The network device also forwards the first copy of the packet to an address of a first egress packet forwarding engine provided in the first portion of the mask, and forwards the second copy of the packet to an address of a second egress packet forwarding engine provided in the second portion of the mask.

Abstract translation: 网络设备接收具有多播下一标识符的分组，并创建包括提供分组的网络设备的出站分组转发引擎的地址的掩码。 网络设备将掩码分成两部分，生成分组的两个副本，在分组的第一副本中提供该掩码的第一部分，并在分组的第二副本中提供该掩码的第二部分。 网络设备还将分组的第一副本转发到在掩码的第一部分中提供的第一出口分组转发引擎的地址，并将分组的第二副本转发到提供的第二出口分组转发引擎的地址 掩模的第二部分。