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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
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.
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公开(公告)号：US11716276B2
公开(公告)日：2023-08-01
申请号：US16811600
申请日：2020-03-06
Applicant: Juniper Networks, Inc.
Inventor： Russ White , Shraddha Hegde
IPC: H04L45/02 , H04L41/0631 , H04L41/12 , H04L45/00
CPC classification number: H04L45/02 , H04L41/0631 , H04L41/12 , H04L45/20
Abstract: A network device may receive topology data identifying a spine and leaf topology of network devices, and may set link metrics to a common value to generate modified topology data. The network device may remove data identifying connections from leaf network devices to any devices outside the topology from the modified topology data to generate further modified topology data, and may process the further modified topology data, with a model, to determine path data identifying paths to destinations. The network device may determine particular path data identifying shorter paths and longer paths to corresponding destinations, and may determine hop counts associated with the paths. The network device may determine whether the hop counts are all odd values, all even values, or odd and even values, and may perform actions based on whether the hop counts are all odd values, all even values, or odd and even values.
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公开(公告)号：US11483242B2
公开(公告)日：2022-10-25
申请号：US16909592
申请日：2020-06-23
Applicant: Juniper Networks, Inc.
Inventor： Salih K A , Shraddha Hegde
IPC: H04L45/745 , H04L45/02 , H04L45/12 , H04L45/50
Abstract: Techniques are described for providing end-to-end segment routing paths across metropolitan area networks. For example, a method comprises receiving, by an area border router (ABR) connected to one or more metropolitan area networks and a core network, a packet including a segment routing label stack including at least a label of the ABR, a context label associated with a routing instance of the ABR, and a subsequent label identifying a device in the segment routing path, determining, from a lookup of the context label in the metro routing table, a table next hop to the core routing table (or metro routing table); in response to determining the table next hop, determining, from a lookup of the subsequent label in the core routing table (or metro routing table), a next hop in the segment routing path; and sending, by the ABR, the packet toward the device in the segment routing path.
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公开(公告)号：US11425022B1
公开(公告)日：2022-08-23
申请号：US16779426
申请日：2020-01-31
Applicant: Juniper Networks, Inc.
Inventor： Ravi Singh , Yimin Shen , Junan Chen , Shraddha Hegde , Ahmed R. Darwish
Abstract: Techniques are disclosed for service-based tunnel selection for forwarding network traffic. In one example, a network device obtains, based on service parameters associated with a network service, a service-specific tunnel selection scheme. The tunnel selection scheme identifies a primary mapping mode for mapping the network service to a primary transport tunnel and fallback mapping modes for mapping the network service to fallback transport tunnels. The primary mapping mode is categorized according to a first type comprising tunnel colorization, while the fallback mapping modes are categorized according to types other than tunnel colorization. In response to determining that the network service cannot be mapped to the primary transport tunnel according to the primary mapping mode, the network device, maps, based on the fallback mapping modes, the network service to the fallback transport tunnels. The network device forwards network traffic associated with the network service via the fallback transport tunnels.
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公开(公告)号：US11336569B2
公开(公告)日：2022-05-17
申请号：US16787911
申请日：2020-02-11
Applicant: Juniper Networks, Inc.
Inventor： Kapil Arora , Samson P. Ninan , Shraddha Hegde
IPC: H04L12/723 , H04L12/707 , H04L12/751 , H04L12/715 , H04L45/50 , H04L45/00 , H04L45/02
Abstract: Ping or traceroute functionality is supported in a path spanning multiple autonomous systems (ASes) having segment routing (SR) enabled, the path including an ingress node in a first autonomous system (AS) and an egress node in an AS other than the first AS, using a reverse path label pair including (1) a node segment identifier (SID) corresponding to an AS Border Router (ASBR) of the second AS (second ASBR), and (2) an egress peer engineering (EPE) SID corresponding to a segment between the second ASBR to an ASBR of the first AS (first ASBR). Responsive to receiving a ping or traceroute request by a router in the second AS, the router generates a ping or traceroute reply including the reverse path label pair. The ping or traceroute reply is forwarded to the second ASBR using the node SID of the reverse path label pair. The ping or traceroute reply is then forwarded from the second ASBR to the first ASBR using the EPE SID of the reverse path label pair. Finally, the ping or traceroute reply can be forwarded (e.g., using standard IP forwarding) from the first ASBR to the headend router.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20200127918A1
公开(公告)日：2020-04-23
申请号：US16167184
申请日：2018-10-22
Applicant: Juniper Networks, Inc.
IPC: H04L12/703 , H04L12/751 , H04L12/727 , H04L12/24 , H04L12/707
Abstract: A first network device detects a link down event associated with a second network device, where the link down event is detected by the first network device prior to being detected by a third network device, and the second network device is a designated network device of a network. The first network device starts a delay timer before processing the link down event, and detects an event that includes at least one of receipt, from the third network device, of a link state advertisement message based on the link down event, or an expiration of the delay timer. The first network device determines the first network device to be a new designated network device for the network based on detecting the event, and provides, to the third network device, information indicating that the first network device is the new designated network device for the network.
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公开(公告)号：US10291531B2
公开(公告)日：2019-05-14
申请号：US15199159
申请日：2016-06-30
Applicant: Juniper Networks, Inc.
Inventor： Raveendra Torvi , Harish Sitaraman , Vishnu Pavan Beeram , Shraddha Hegde , Chandrasekar Ramachandran , Sudharsana Venkataraman
IPC: H04L12/803 , H04L12/24 , H04L12/26 , H04L12/723 , H04L12/801 , H04L12/911
Abstract: 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.
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公开(公告)号：US20160261501A1
公开(公告)日：2016-09-08
申请号：US14666151
申请日：2015-03-23
Applicant: Juniper Networks, Inc.
Inventor： Shraddha Hegde , Pushpasis Sarkar , Hannes Gredler
IPC: H04L12/801 , H04L12/707
CPC classification number: H04L47/12 , H04L45/22 , H04L45/64 , H04L45/68 , H04L47/115
Abstract: In general, techniques are generally described for reducing or preventing transient black-holing of network traffic in an overlay network. A method includes executing, by a network device included in a link state domain, an Interior Gateway Protocol (IGP) to exchange link-state messages with at least one remote network device in the link-state domain; generating, by the network device, an IGP link-state message that includes link overload information to overload a link in the link-state domain that couples the network device to the remote network device; and sending, by the network device and to the at least one other network device, the IGP link-state message that includes the link overload information to direct the remote network device to stop sending network traffic to the network device using the overloaded link.
Abstract translation: 通常，通常描述用于减少或防止覆盖网络中网络流量的瞬时黑洞的技术。 一种方法包括：通过包括在链路状态域中的网络设备执行内部网关协议（IGP），以与链路状态域中的至少一个远程网络设备交换链路状态消息; 由所述网络设备生成包括链路过载信息的IGP链路状态消息，以使所述网络设备耦合到所述远程网络设备的链路状态域中的链路过载; 以及由所述网络设备和所述至少一个其他网络设备发送包含所述链路过载信息的所述IGP链路状态消息，以指示所述远程网络设备停止使用所述重载链路将网络流量发送到所述网络设备。
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公开(公告)号：US11909629B2
公开(公告)日：2024-02-20
申请号：US18045565
申请日：2022-10-11
Applicant: Juniper Networks, Inc.
Inventor： Shraddha Hegde , Salih K A
IPC: H04L45/00 , H04L45/42 , H04L69/22 , H04L45/745 , H04L45/741 , H04L45/24
CPC classification number: H04L45/20 , H04L45/24 , H04L45/42 , H04L45/741 , H04L45/745 , H04L69/22
Abstract: A network device may receive policy data identifying a first segment routing (SR) policy and a second SR policy. The first SR policy may be associated with a first path through a network and a first next hop, and the second SR policy may be associated with a second path through the network and a second next hop. The network device may advertise, to another device, reachability associated with the first next hop and the second next hop, and may receive, from the other device, a packet with a header. The network device may determine, from the header, data identifying the first next hop or the second next hop, without performing a lookup, and may cause the packet to be routed to a destination address, via the first path or the second path, based on the policy data associated with the first next hop or the second next hop.
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公开(公告)号：US11736385B1
公开(公告)日：2023-08-22
申请号：US17820423
申请日：2022-08-17
Applicant: Juniper Networks, Inc.
Inventor： Shraddha Hegde , Russ White
IPC: G06F15/173 , H04L45/122 , H04L45/02 , H04L45/12
CPC classification number: H04L45/122 , H04L45/02 , H04L45/123
Abstract: A network device may receive, from a transmission network device, a link state message associated with an origination network device. The network device may determine an order of a set of one-hop neighbor network devices from the transmission network device. The network device may determine, based on the link state message and the order of the set of one-hop neighbor network devices, whether the network device is to send a copy of the link state message to at least one one-hop neighbor network device of the network device. The network device may send, or refraining from sending, by the network device and based on determining whether the network device is to send the copy of the link state message to the at least one one-hop neighbor network device of the network device, the link state message to the at least one one-hop neighbor network device of the network device.
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