公开(公告)号：US20220210050A1

公开(公告)日：2022-06-30

申请号：US17248905

申请日：2021-02-12

Applicant: Juniper Networks, Inc.

Inventor： Shraddha HEGDE ,  Salih K A

IPC: H04L12/733 ,  H04L12/717 ,  H04L12/707 ,  H04L12/741 ,  H04L12/749 ,  H04L29/06

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.

公开(公告)号：US20210306265A1

公开(公告)日：2021-09-30

申请号：US16909592

申请日：2020-06-23

Applicant: Juniper Networks, Inc.

Inventor： Salih K A ,  Shraddha Hegde

IPC: H04L12/741 ,  H04L12/723 ,  H04L12/721 ,  H04L12/751 ,  H04L12/715

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.

公开(公告)号：US09755962B2

公开(公告)日：2017-09-05

申请号：US14700025

申请日：2015-04-29

Applicant: Juniper Networks, Inc.

Inventor： Salih K A ,  Shraddha Hegde

IPC: H04L12/721 ,  H04L12/751 ,  H04L12/801

CPC classification number: H04L45/32 ,  H04L45/02 ,  H04L45/026 ,  H04L45/26 ,  H04L47/10

Abstract: A routing device coupled to a remote routing device via a link on which a flood reduction technique is used, such as a demand circuit, is configured to store an indication of a link state of the remote routing device and a first sequence number associated with the link state, receive an indication that the remote routing device is performing a graceful restart, and then receive data indicative of a new link state of the remote routing device and a second sequence number. The routing device determines whether the new link state is different than the stored indication of the link state, and if not, avoids requesting the current link state from the remote routing device. In this manner, the routing device may reduce link-state protocol traffic within an autonomous system including the routing device and the remote routing device.

公开(公告)号：US20160269293A1

公开(公告)日：2016-09-15

申请号：US14700025

申请日：2015-04-29

Applicant: Juniper Networks, Inc.

Inventor： Salih K A ,  Shraddha Hegde

IPC: H04L12/801 ,  H04L12/721

CPC classification number: H04L45/32 ,  H04L45/02 ,  H04L45/026 ,  H04L45/26 ,  H04L47/10

Abstract: A routing device coupled to a remote routing device via a link on which a flood reduction technique is used, such as a demand circuit, is configured to store an indication of a link state of the remote routing device and a first sequence number associated with the link state, receive an indication that the remote routing device is performing a graceful restart, and then receive data indicative of a new link state of the remote routing device and a second sequence number. The routing device determines whether the new link state is different than the stored indication of the link state, and if not, avoids requesting the current link state from the remote routing device. In this manner, the routing device may reduce link-state protocol traffic within an autonomous system including the routing device and the remote routing device.

Abstract translation: 经由其上使用洪泛削减技术的链路（例如需求电路）耦合到远程路由设备的路由设备被配置为存储远程路由设备的链路状态的指示和与该远程路由设备相关联的第一序列号 链接状态，接收远程路由设备正在执行平滑重启的指示，然后接收指示远程路由设备的新链路状态的数据和第二序列号。 路由设备确定新的链路状态是否不同于存储的链路状态的指示，如果不是，则避免从远程路由设备请求当前的链路状态。 以这种方式，路由设备可以减少包括路由设备和远程路由设备在内的自治系统内的链路状态协议流量。

公开(公告)号：US12289229B2

公开(公告)日：2025-04-29

申请号：US18327392

申请日：2023-06-01

Applicant: Juniper Networks, Inc.

Inventor： Kiran Kushalad ,  Rajendra Prasad Bollam ,  Rajesh Shetty Manur ,  Salih K A ,  Shraddha Hegde ,  Sri Karthik Goud Gadela ,  Swamy Sadashivaiah Kananda

IPC: H04L45/02 ,  H04L45/00 ,  H04L45/74

Abstract: A first network device may receive an advertisement that includes a prefix for a second network device, wherein the advertisement is destined for a third network device. The first network device may determine, based on a network topology, whether a next hop is one hop away or multiple hops away. The first network device may selectively modify the advertisement to include a first segment identifier, based on the next hop being one hop away and to generate a first modified advertisement, or may modify the advertisement to include a second segment identifier, based on the next hop being multiple hops away and to generate a second modified advertisement. The first network device may forward the first modified advertisement or the second modified advertisement toward the third network device.

公开(公告)号：US11323371B1

公开(公告)日：2022-05-03

申请号：US17248534

申请日：2021-01-28

Applicant: Juniper Networks, Inc.

Inventor： Sri Karthik Goud Gadela ,  Swamy Sadashivaiah Renu Kananda ,  Ronald P. Bonica ,  Salih K A ,  Deepti Nirmalkumarji Rathi ,  Rajesh Shetty Manur ,  Shraddha Hegde

IPC: G06F15/173 ,  H04L45/745 ,  H04L45/00 ,  H04L12/46 ,  H04L43/10 ,  H04L45/42

Abstract: This disclosure describes techniques for using Operations, Administration, and Management (OAM) operations when routing packets using micro SIDs in segment routing. For example, a network device comprises one or more processors configured to: receive a packet; determine whether the packet is encapsulated with one or more micro segment identifiers (SIDs); in response to a determination that the packet is not encapsulated with one or more micro SIDs, determine whether the packet has reached a segment routing tunnel endpoint; and in response to a determination that the packet has reached the segment routing tunnel endpoint, initiate Operations, Administration, and Maintenance (OAM).

公开(公告)号：US10469360B1

公开(公告)日：2019-11-05

申请号：US14871788

申请日：2015-09-30

Applicant: Juniper Networks, Inc.

Inventor： Bharath RadhaKrishna Bhat ,  Shraddha Hegde ,  Salih K A

IPC: H04L12/733 ,  H04L12/721

Abstract: In one example, a method includes by a first network device positioned on a border of a first area of a multi-area hierarchical network and a second area of the multi-area hierarchical network, determining a cost associated with sending network traffic from a client group to the first network device, wherein the client group is positioned in the first area, the first area and the second area being distinct routing domains of the multi-area hierarchical network; and outputting, by the first network device to a second network device positioned in the second area, a routing advertisement that specifies the determined cost as a reverse metric. In some examples, a route reflector receives the routing advertisement and based on the cost from the client group to the area border network device, selects an egress point from among a plurality of egress points of the multi-area hierarchical network.

公开(公告)号：US09729451B2

公开(公告)日：2017-08-08

申请号：US14657147

申请日：2015-03-13

Applicant: Juniper Networks, Inc.

Inventor： Shraddha Hegde ,  Salih K A

IPC: H04L12/28 ,  H04L12/803 ,  H04L12/751 ,  H04L12/715

CPC classification number: H04L47/125 ,  H04L45/02 ,  H04L45/025 ,  H04L45/04

Abstract: In general, techniques are described for managing routing information in a hub-and-spoke network in a manner that reduces flooding of link information. A hub router of the hub-and-spoke network including a memory and a processor may perform the techniques. The memory may be configured to store a representation of a topology of the hub-and-spoke network. The processor may be configured to utilize a separate instance of a multi-instance version of a link state protocol to communicate with each of a plurality of spoke routers of the hub-and-spoke network. Each separate instance of the multi-instance version of the link state protocol may include the hub router and a different one of the plurality of spoke routers. The processor may process link state advertisements from the separate instances of the multi-instance version of the link state protocol to maintain the representation of the topology of the hub-and-spoke network.