公开(公告)号：US11770331B1

公开(公告)日：2023-09-26

申请号：US17527806

申请日：2021-11-16

申请人： Juniper Networks, Inc.

发明人： Kireeti Kompella ,  Vishnu Pavan Beeram ,  Swamy Sadashivaiah Kananda ,  Jonathan C. Barth ,  Tarek Saad ,  Chandrasekar Ramachandran ,  Srihari Ramachandra Sangli

IPC分类号： H04L45/50 ,  H04L47/20

CPC分类号： H04L45/50 ,  H04L47/20

摘要： A network device may receive an MPLS packet destined for a destination via a label-switched path (LSP), and may determine whether to apply a first special purpose label (SPL) option or a second SPL option for a label stack of the MPLS packet. The network device may apply, when the first SPL option is determined to be applied, one of a first type of the first SPL option for the label stack via a policy data indicator (PDI) and policy data (PD), or a second type of the first SPL option for the label stack via the PDI and the PD. The network device may forward the MPLS packet to a hop of the LSP based on the first type of the first SPL option or the second type of the first SPL option applied to the MPLS packet.

公开(公告)号：US20170180248A1

公开(公告)日：2017-06-22

申请号：US15450851

申请日：2017-03-06

申请人： Juniper Networks, Inc.

发明人： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC分类号： H04L12/723 ,  H04L12/911 ,  H04L12/751 ,  H04L12/707

CPC分类号： H04L45/28 ,  H04L41/0654 ,  H04L41/0668 ,  H04L45/026 ,  H04L45/22 ,  H04L45/50 ,  H04L45/507 ,  H04L47/72 ,  H04L47/728 ,  H04L65/4069

摘要： In one example, techniques of this disclosure may enable a point of local repair (PLR) network device to signal availability of link protection or node protection to a merge point (MP) network device and enable a network device to actively determine whether or not it is a merge point router. Based on whether or not the network device determines it is a MP, the network device may selectively clean up LSP states when there is an upstream link or node failure. The RSVP-TE protocol may be extended to enable a network device to send a tear down message to a downstream router, which may enable the downstream router to conditionally delete locale LSP state information. In some instances, a PLR network device may directly send a tear down message to a MP network device even though the PLR network device may not have a working bypass LSP.

公开(公告)号：US09660860B1

公开(公告)日：2017-05-23

申请号：US14585303

申请日：2014-12-30

申请人： Juniper Networks, Inc.

发明人： Yakov Rekhter ,  Raveendra Torvi ,  Ravi Singh ,  Minjie Dai ,  John E. Drake ,  Vishnu Pavan Kumar Beeram ,  Yimin Shen ,  Harish Sitaraman ,  Chandrasekar Ramachandran

IPC分类号： H04L12/26 ,  H04L12/24 ,  H04L12/723

CPC分类号： H04L45/50 ,  H04L41/0631 ,  H04L41/0659 ,  H04L45/28

摘要： In general, techniques are described for a path computation delay timer for multi-protocol label switched networks. As an example, an ingress network device configured to act as an ingress for a label switched path (LSP) may perform the techniques. The ingress network device comprises an interface and a processor. The interface may receive a message indicating an error along the LSP. The processor may delay an operation performed to configure a replacement LSP to be used in place of the LSP in order to provide time during which a cause of the error along the LSP is able to be determined. When the cause of the error is determined to be a failure of a network device supporting operation of the LSP, the processor may further perform the operation to configure the replacement LSP with the ingress network device such that the replacement LSP avoids the failed network device.

公开(公告)号：US10560376B2

公开(公告)日：2020-02-11

申请号：US15869946

申请日：2018-01-12

申请人： Juniper Networks, Inc.

发明人： Kaliraj Vairavakkalai ,  Chandrasekar Ramachandran

IPC分类号： H04L12/26 ,  H04L12/723 ,  H04L12/46 ,  H04L12/781 ,  H04L12/751 ,  H04L12/715

摘要： A device may receive a set of border gateway protocol labels via a set of corresponding border gateway protocol messages. A border gateway protocol label, of the set of border gateway protocol labels, may be associated with a label descriptor attribute. The label descriptor attribute being associated with providing information regarding a forwarding semantic associated with the border gateway protocol label. The device may select the border gateway protocol label for routing network traffic toward a network device associated with the border gateway protocol label based on the label descriptor attribute. The device may route the network traffic toward the network device based on the border gateway protocol label and after selecting the border gateway protocol label.

公开(公告)号：US20190386914A1

公开(公告)日：2019-12-19

申请号：US16007847

申请日：2018-06-13

申请人： Juniper Networks, Inc.

发明人： Vishnu Pavan Beeram ,  Raveendra Torvi ,  Harish Sitaraman ,  Chandrasekar Ramachandran

IPC分类号： H04L12/723

摘要： In general, techniques described are for providing graceful restart procedures for network devices of label switched paths (LSPs) implemented with label stacks. For example, a restarting network device may include a processor coupled to a memory that executes software configured to: receive a path signaling message including a recovery object that defines a reverse path of the LSP from an egress network device of the LSP to the restarting network device, including at least an upstream label and a downstream label associated with the restarting network device; determine, based on the recovery object, the upstream label and the downstream label associated with the restarting network device; and instantiate a control plane state of the restarting network device based on the recovery object.

公开(公告)号：US10361949B2

公开(公告)日：2019-07-23

申请号：US15493103

申请日：2017-04-20

申请人： Juniper Networks, Inc.

发明人： Harish Sitaraman ,  Raveendra Torvi ,  Markus Jork ,  Kireeti Kompella ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC分类号： H04L1/00 ,  H04L12/741 ,  H04L12/723 ,  H04L12/701 ,  H04L12/781

摘要： The disclosed computer-implemented method may include (1) receiving, at a network node within a network, a packet from another network node within the network, (2) identifying, within the packet, a label stack that includes a plurality of labels that collectively represent at least a portion of an LSP within the network, (3) popping, from the label stack, a label that corresponds to a specific link to a further network node, and then upon popping the label from the label stack, (4) forwarding the packet to the further network node by way of the specific link. Various other methods, systems, and apparatuses are also disclosed.

公开(公告)号：US20180139128A1

公开(公告)日：2018-05-17

申请号：US15869946

申请日：2018-01-12

申请人： Juniper Networks, Inc.

发明人： Kaliraj Vairavakkalai ,  Chandrasekar Ramachandran

IPC分类号： H04L12/723 ,  H04L12/715 ,  H04L12/751 ,  H04L12/781 ,  H04L12/46

摘要： A device may receive a set of border gateway protocol labels via a set of corresponding border gateway protocol messages. A border gateway protocol label, of the set of border gateway protocol labels, may be associated with a label descriptor attribute. The label descriptor attribute being associated with providing information regarding a forwarding semantic associated with the border gateway protocol label. The device may select the border gateway protocol label for routing network traffic toward a network device associated with the border gateway protocol label based on the label descriptor attribute. The device may route the network traffic toward the network device based on the border gateway protocol label and after selecting the border gateway protocol label.

公开(公告)号：US20180006948A1

公开(公告)日：2018-01-04

申请号：US15199159

申请日：2016-06-30

申请人： Juniper Networks, Inc.

发明人： Raveendra Torvi ,  Harish Sitaraman ,  Vishnu Pavan Beeram ,  Shraddha Hegde ,  Chandrasekar Ramachandran ,  Sudharsana Venkataraman

IPC分类号： H04L12/803 ,  H04L12/24 ,  H04L12/26 ,  H04L12/723

CPC分类号： H04L47/125 ,  H04L41/0896 ,  H04L43/0882 ,  H04L43/0894 ,  H04L43/16 ,  H04L45/50 ,  H04L47/11 ,  H04L47/822

摘要： In general, techniques described are for bandwidth sharing between resource reservation protocol label switched paths (LSPs) and non-resource reservation protocol LSPs. For example, in networks where resource reservation protocol LSPs and non-resource reservation protocol LSPs co-exist within the same domain, resource reservation protocol LSPs and non-resource reservation protocol LSPs may share link bandwidth. However, when non-resource reservation protocol LSPs are provisioned, resource reservation protocol path computation elements computing resource reservation protocol paths may not account for non-resource reservation protocol LSP bandwidth utilization. The techniques described herein provide a mechanism for automatically updating traffic engineering database (TED) information about resource reservation protocol LSPs in a way that accounts for non-resource reservation protocol LSP traffic flow statistics, such as bandwidth utilization. Path computation elements may thus rely on an accurate TED for LSP path computation.

公开(公告)号：US09590895B2

公开(公告)日：2017-03-07

申请号：US14585683

申请日：2014-12-30

申请人： Juniper Networks, Inc.

发明人： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC分类号： H04L12/24 ,  H04L12/703 ,  H04L12/723 ,  H04L12/751 ,  H04L12/913 ,  H04L12/911 ,  H04L12/707 ,  H04L29/06

CPC分类号： H04L45/28 ,  H04L41/0654 ,  H04L41/0668 ,  H04L45/026 ,  H04L45/22 ,  H04L45/50 ,  H04L45/507 ,  H04L47/72 ,  H04L47/728 ,  H04L65/4069

摘要： In one example, techniques of this disclosure may enable a point of local repair (PLR) network device to signal availability of link protection or node protection to a merge point (MP) network device and enable a network device to actively determine whether or not it is a merge point router. Based on whether or not the network device determines it is a MP, the network device may selectively clean up LSP states when there is an upstream link or node failure. The RSVP-TE protocol may be extended to enable a network device to send a tear down message to a downstream router, which may enable the downstream router to conditionally delete locale LSP state information. In some instances, a PLR network device may directly send a tear down message to a MP network device even though the PLR network device may not have a working bypass LSP.

摘要翻译： 在一个示例中，本公开的技术可以使得本地修复（PLR）网络设备的点能够向合并点（MP）网络设备通知链路保护或节点保护的可用性，并使得网络设备能够主动地确定其是否 是一个合并点路由器。 基于网络设备是否确定它是MP，当存在上游链路或节点故障时，网络设备可以选择性地清除LSP状态。 可以扩展RSVP-TE协议以使网络设备向下游路由器发送撕下消息，这可以使下游路由器有条件地删除区域性LSP状态信息。 在一些情况下，即使PLR网络设备可能没有工作旁路LSP，PLR网络设备也可以直接向MP网络设备发送拆卸消息。

公开(公告)号：US11252100B2

公开(公告)日：2022-02-15

申请号：US16577864

申请日：2019-09-20

申请人： Juniper Networks, Inc.

发明人： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC分类号： H04L12/707 ,  H04L12/733 ,  H04L12/911 ,  H04L12/703 ,  H04L12/723 ,  H04L12/913

摘要： The disclosed computer-implemented method may include (1) receiving, at a network node within a network, a packet from another network node within the network, (2) identifying, within the packet, a label stack that includes a plurality of labels that collectively represent at least a portion of a label-switched path within the network, (3) popping, from the label stack, a label that corresponds to a next hop of the network node, (4) determining, based at least in part on the label, that the next hop has experienced a failure that prevents the packet from reaching a destination via the next hop, (5) identifying a backup path that merges with the label-switched path at a next-to-next hop included in the label-switched path, and then (6) forwarding the packet to the next-to-next hop via the backup path. Various other methods, systems, and apparatuses are also disclosed.