公开(公告)号：US09692691B1

公开(公告)日：2017-06-27

申请号：US14585329

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Yakov Rekhter

IPC: H04L12/723 ,  H04L12/913 ,  H04L12/775 ,  H04L12/751 ,  H04L12/707

CPC classification number: H04L45/50 ,  H04L45/507 ,  H04L45/58 ,  H04L47/724

Abstract: In general, techniques are described for configuration of label switched paths in multi-protocol label switched networks. A router comprising a control unit and an interface may be configured to perform the techniques. The control unit may determine a label to bind to the LSP. The interface may transmit a message specifying the label that has been bound to the LSP prior to confirming that the LSP has been successfully configured within the support router to use the bound label.

公开(公告)号：US09590894B2

公开(公告)日：2017-03-07

申请号：US14585664

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC: H04W28/26 ,  H04L12/723 ,  H04L12/751 ,  H04L12/703 ,  H04L12/911 ,  H04L12/707 ,  H04L12/24 ,  H04L29/06

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

Abstract: 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.

Abstract translation: 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：US20160119821A1

公开(公告)日：2016-04-28

申请号：US14585664

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC: H04W28/26 ,  H04L12/723 ,  H04L12/751

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

Abstract: 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.

Abstract translation: 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：US20160119223A1

公开(公告)日：2016-04-28

申请号：US14585683

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Chandrasekar Ramachandran ,  Markus Jork ,  Yakov Rekhter ,  Harish Sitaraman

IPC: H04L12/703 ,  H04L12/24 ,  H04L12/911 ,  H04L12/707 ,  H04L12/751 ,  H04L12/723

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

Abstract: 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.

Abstract translation: 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

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

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

Abstract: 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.

公开(公告)号：US11032196B2

公开(公告)日：2021-06-08

申请号：US16947408

申请日：2020-07-31

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Zhifang Zeng ,  Shraddha Hegde

IPC: H04L12/741 ,  H04L29/06 ,  H04L12/26

Abstract: A first device may receive a packet that includes information identifying a path through a network. The first device may configure a header of the packet to include a first set of identifiers that identifies the path and the first device via which the packet was received. The first device may configure the header of the packet to include a second set of identifiers that identifies a set of devices associated with the path. The set of devices may be associated with providing the packet via a network. The first device may determine whether a counter associated with the first set of identifiers has been initialized. The first device may modify a value of the counter to record a metric. The first device may provide the packet to a second device. The first device may perform an action related to the packet or based on the value of the counter.

公开(公告)号：US20200021535A1

公开(公告)日：2020-01-16

申请号：US16577864

申请日：2019-09-20

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L12/911 ,  H04L12/703 ,  H04L12/707 ,  H04L12/723

Abstract: 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.

公开(公告)号：US10469371B2

公开(公告)日：2019-11-05

申请号：US15863611

申请日：2018-01-05

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L12/00 ,  H04L12/723 ,  H04L12/733

Abstract: The disclosed system may include (1) receiving, at an ingress node within a network, a request to forward a packet along a label-switched path to an egress node within the network, (2) identifying a limit on the number of labels that the ingress node is capable of forwarding within a label stack of the packet, (3) determining that the number of hops within the label-switched path exceeds the limit on the number of labels that the ingress node is capable of forwarding, (4) selecting at least one of the hops within the label-switched path to act as a delegation node that imposes, onto the label stack of the packet, at least one label corresponding to a downstream hop within the label-switched path and (5) forwarding the packet from the ingress node to the delegation node to enable the delegation node to impose the label onto the label stack.

公开(公告)号：US20180367450A1

公开(公告)日：2018-12-20

申请号：US15863611

申请日：2018-01-05

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L12/723 ,  H04L12/733

CPC classification number: H04L45/50 ,  H04L45/20

Abstract: The disclosed system may include (1) receiving, at an ingress node within a network, a request to forward a packet along a label-switched path to an egress node within the network, (2) identifying a limit on the number of labels that the ingress node is capable of forwarding within a label stack of the packet, (3) determining that the number of hops within the label-switched path exceeds the limit on the number of labels that the ingress node is capable of forwarding, (4) selecting at least one of the hops within the label-switched path to act as a delegation node that imposes, onto the label stack of the packet, at least one label corresponding to a downstream hop within the label-switched path and (5) forwarding the packet from the ingress node to the delegation node to enable the delegation node to impose the label onto the label stack.

公开(公告)号：US20180262440A1

公开(公告)日：2018-09-13

申请号：US15688813

申请日：2017-08-28

Applicant: Juniper Networks, Inc.

Inventor： Harish Sitaraman ,  Raveendra Torvi ,  Vishnu Pavan Beeram ,  Chandrasekar Ramachandran

IPC: H04L12/911 ,  H04L12/703 ,  H04L12/707

CPC classification number: H04L47/728 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L47/724 ,  H04L47/825

Abstract: 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.