公开(公告)号：US20210119872A1

公开(公告)日：2021-04-22

申请号：US17135421

申请日：2020-12-28

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/24 ,  G06F9/54 ,  G06F16/27 ,  G06F16/901

Abstract: In general, techniques are described for communicating state information in distribute operating system. A network device comprises a first hardware node and a second hardware node. The first hardware node may execute a first instance of a distributed operating system, and maintain a first data structure that stores a plurality of objects defining a portion of state information. The second hardware node may execute a second instance of the distributed operating system, and maintain a second data structure that stores synchronized versions of the plurality of objects. The first hardware node may further receive updated state information, update the first data structure to include the updated state information, and synchronize the updated first data structure with the second data structure. The second hardware node may synchronize the second data structure with the updated first data structure.

公开(公告)号：US20180176120A1

公开(公告)日：2018-06-21

申请号：US15637839

申请日：2017-06-29

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/721 ,  H04L12/725 ,  H04L12/753 ,  G06F9/48 ,  H04L12/24

CPC classification number: H04L45/14 ,  G06F9/4843 ,  G06F9/5061 ,  G06F11/1438 ,  G06F11/1658 ,  G06F2201/81 ,  H04L41/0654 ,  H04L41/082 ,  H04L41/0873 ,  H04L41/12 ,  H04L43/0811 ,  H04L45/021 ,  H04L45/302 ,  H04L45/48 ,  H04L45/583 ,  H04L2012/6467

Abstract: In general, techniques are described for maintaining coherency in distributed operating systems for network devices. A network device comprising hardware computing nodes may be configured to perform the techniques. The hardware computing nodes may execute a distributed operating system. At least one the hardware computing nodes may determine whether one or more of the plurality of hardware computing nodes has failed and is no longer supporting execution of the distributed operating system, and determine whether remaining ones of the plurality of hardware computing nodes exceeds a quorum threshold. The at least one of the hardware computing nodes may further restart, when the remaining ones of the plurality of hardware computing nodes is less than the quorum threshold, the distributed operating system.

公开(公告)号：US20180176093A1

公开(公告)日：2018-06-21

申请号：US15637809

申请日：2017-06-29

Applicant: Juniper Networks, Inc.

Inventor： David M. Katz ,  Ross W. Callon ,  Scott Mackie ,  Dennis C. Ferguson

IPC: H04L12/24 ,  H04L12/751 ,  G06F9/48 ,  H04L12/753

CPC classification number: H04L41/12 ,  G06F9/4843 ,  G06F9/5061 ,  G06F11/2023 ,  G06F11/2097 ,  G06F2201/81 ,  H04L45/02 ,  H04L45/48

Abstract: In general, techniques are described for organizing execution of distributed operating systems for network devices. A device comprising hardware computing nodes may be configured to perform the techniques. The hardware computing nodes may execute a protocol by which to discover a topology of the plurality of hardware computing nodes, and determine, based on the topology, a subset of the plurality of hardware computing nodes to manage execution of a distributed operating system. The determined subset of the plurality of hardware computing nodes may execute a communication bus by which to synchronize operating system state information between the subset of the plurality of hardware computing nodes. The hardware computing nodes may further execute, based on the operating system state information, the distributed operating system to provide an execution environment in which one or more applications execute.

公开(公告)号：US09838306B2

公开(公告)日：2017-12-05

申请号：US14675338

申请日：2015-03-31

Applicant: Juniper Networks, Inc.

Inventor： Yimin Shen ,  Raveendra Torvi ,  Ross W. Callon

IPC: H04L12/00 ,  H04L12/723 ,  H04L12/707 ,  H04L12/703 ,  H04L12/913

CPC classification number: H04L45/50 ,  H04L45/22 ,  H04L45/24 ,  H04L45/28 ,  H04L47/724

Abstract: Techniques are described for establishing a second label switched path (LSP) instance of an LSP having a first LSP instance. In one example, for each downstream router designated for the second LSP instance of the LSP, the router determines whether the router is part of the first instance of the LSP and, if so, whether the first and second LSP instances for that downstream router share a common link to a nexthop router. If the first and second LSP instances share a common link to a nexthop router, the downstream router transmits a first message to the nexthop router, wherein the first message includes a suggested label. The downstream router receives, from the nexthop router, a second message, wherein the second message includes the suggested label. In another example, a label reuse indicator flag in a message from the ingress router causes routers on the second LSP instance to reuse the label of the first LSP instance when the same link is used to the upstream router for both LSP instances.