公开(公告)号：US07599313B2

公开(公告)日：2009-10-06

申请号：US11117223

申请日：2005-04-28

Applicant: Keyur Patel ,  Ruchi Kapoor ,  James N. Guichard

Inventor： Keyur Patel ,  Ruchi Kapoor ,  James N. Guichard

IPC: H04L12/28

CPC classification number: H04L45/04 ,  H04L45/02

Abstract: A method for scaling hierarchical route reflectors (RRs) using automated Outbound Route Filtering (ORF) is presented. A first route reflector identifies other route reflectors configured as Route reflector clients within a route reflector hierarchy. The first route reflector then builds a common set of route target filters received from the client route reflectors and sends the common set of route target filters to client route reflectors.

Abstract translation: 提出了一种使用自动出站路由过滤（ORF）来缩放分层路由反射器（RR）的方法。 第一个路由反射器标识在路由反射器层次结构中被配置为路由反射器客户端的其他路由反射器。 然后，第一个路由反射器构建从客户端路由反射器接收的一组通用路由目标过滤器，并将通用的路由目标过滤器集合发送到客户端路由反射器。

公开(公告)号：US07599312B2

公开(公告)日：2009-10-06

申请号：US11077776

申请日：2005-03-11

Applicant: Keyur Patel ,  Chandrashekhar Appanna ,  Robert Raszuk

Inventor： Keyur Patel ,  Chandrashekhar Appanna ,  Robert Raszuk

IPC: H04L12/28 ,  G06F15/177

CPC classification number: H04L45/02 ,  H04L45/04

Abstract: Routes are withdrawn based on a query defined in a withdraw message. One or more route update messages identifying multiple routes with associated attributes and Type-Length-Values (TLVs) are received, and a routing database is updated to include the routes and their associated attributes and TLVs. A particular message associated with a route withdraw operation is received, with the particular message including an indication of at least two specified values and an operator, with each of the specified values being an attribute or a TLV. One or more routes are withdrawn from the routing database matching a query defined based on the specified values and the operator. In one embodiment, each of said attributes is a Border Gateway Protocol attribute. One embodiment includes sending a message including an advertisement of supporting MP_AGGREGATE_WITHDRAW capability.

Abstract translation: 基于撤消消息中定义的查询撤销路由。 接收到标识具有关联属性和类型长度值（TLV）的多个路由的一个或多个路由更新消息，并且更新路由数据库以包括路由及其相关联的属性和TLV。 接收与路由提取操作相关联的特定消息，其中特定消息包括至少两个指定值的指示和操作符，其中每个指定值是属性或TLV。 一个或多个路由从路由数据库中取出，匹配基于指定值定义的查询和运算符。 在一个实施例中，每个所述属性是边界网关协议属性。 一个实施例包括发送包括支持MP_AGGREGATE_WITHDRAW能力的广告的消息。

公开(公告)号：US20070206587A1

公开(公告)日：2007-09-06

申请号：US11369262

申请日：2006-03-06

Applicant: Anantha Ramaiah ,  Keyur Patel ,  David Ward ,  Robert Raszuk

Inventor： Anantha Ramaiah ,  Keyur Patel ,  David Ward ,  Robert Raszuk

IPC: H04L12/56

CPC classification number: H04L45/04 ,  H04L45/02

Abstract: Devices executing routing protocols can mark routing protocol messages as urgent so that peer devices are signaled to consume the messages on an expedited basis. Performance of routing protocols improves as a result; for example, Border Gateway Protocol convergence time is reduced. An example router comprises a network interface, a processor, a transport layer protocol module that implements a transport layer network protocol, a routing protocol module that implements a network packet routing protocol and sends peering session messages over transport layer connections, and instructions to perform providing a first routing protocol message to the transport layer protocol module that comprises urgent data at least in part; requesting the transport layer protocol module to mark, as urgent, one or more data segments that carry the first routing protocol message; marking, as urgent, one or more segments that carry the first routing protocol message; and sending the segments to peer devices over the connections.

Abstract translation: 执行路由协议的设备可以将路由协议消息标记为紧急，以便对等设备进行信号通知以快速消费消息。 因此，路由协议的性能得到改善; 例如，边界网关协议收敛时间减少。 示例路由器包括网络接口，处理器，实现传输层网络协议的传输层协议模块，实现网络分组路由协议并通过传输层连接发送对等会话消息的路由协议模块，以及执行提供的指令 至少部分地包括紧急数据的传输层协议模块的第一路由协议消息; 请求传输层协议模块紧急地标记携带第一路由协议消息的一个或多个数据段; 标记为紧急的携带第一路由协议消息的一个或多个段; 并通过连接将段发送到对等设备。

公开(公告)号：US20060171404A1

公开(公告)日：2006-08-03

申请号：US11395986

申请日：2006-03-30

Applicant: Gargi Nalawade ,  Keyur Patel ,  Ruchi Kapoor

Inventor： Gargi Nalawade ,  Keyur Patel ,  Ruchi Kapoor

IPC: H04L12/56 ,  H04L12/54

CPC classification number: H04L45/28 ,  H04L45/02 ,  H04L45/52 ,  H04L45/563

Abstract: A network data packet routing apparatus with BGP is configured to soft reset an AFI or SAFI, so that forwarding on routes associated with the AFI or SAFI can continue even after an event or error. One approach involves establishing a Border Gateway Protocol (BGP) peering session between a first node and a second node in a packet-switched network; detecting a BGP condition requiring a reset of a BGP address family indicator (AFI) data structure or a sub-address family indicator (SAFI) data structure, wherein the BGP condition does not affect states of routes in the AFI or SAFI; preserving a BGP state and a forwarding state of the AFI or SAFI; and forwarding data on routes represented in the AFI or SAFI. Soft notification messaging and marking routes as stale facilitates the approach.

Abstract translation: 具有BGP的网络数据分组路由设备被配置为软复位AFI或SAFI，使得即使在事件或错误之后，与AFI或SAFI相关联的路由上的转发也可以继续。 一种方法涉及在分组交换网络中的第一节点和第二节点之间建立边界网关协议（BGP）对等体会话; 检测需要复位BGP地址族指示符（AFI）数据结构或子地址族指示符（SAFI）数据结构的BGP条件，其中BGP条件不影响AFI或SAFI中的路由状态; 保持BGP状态和AFI或SAFI的转发状态; 并转发AFI或SAFI所代表的路由数据。 软通知消息和标记路由为陈旧方便。

公开(公告)号：US20060133390A1

公开(公告)日：2006-06-22

申请号：US11023056

申请日：2004-12-22

Applicant: Arjun Sreekantiah ,  Ruchi Kapoor ,  Keyur Patel ,  Robert Raszuk

Inventor： Arjun Sreekantiah ,  Ruchi Kapoor ,  Keyur Patel ,  Robert Raszuk

IPC: H04L12/56 ,  H04L12/28

CPC classification number: H04L45/02 ,  H04L45/04

Abstract: A method is disclosed for providing prioritized routing table convergence in Border Gateway Protocol (BGP) hosts, as part of a BGP process that is executed by a route processor in a network, wherein the processor hosts a plurality of BGP routing tables each associated with a specified sub-address family (SAFI). A convergence priority order value is created and stored in association with each routing table. As part of performing a convergence phase of BGP processing, the convergence priority order value of each routing table is obtained. The convergence phase is then performed for the routing tables only according to an order that is represented by the convergence priority order values. Therefore, convergence proceeds more quickly and values needed by other routing processes become available earlier.

Abstract translation: 公开了一种用于在边界网关协议（BGP）主机中提供优先级路由表收敛的方法，作为由网络中的路由处理器执行的BGP进程的一部分，其中处理器承载多个BGP路由表，每个BGP路由表与 指定的子地址族（SAFI）。 与每个路由表相关联地创建和存储收敛优先级顺序值。 作为执行BGP处理收敛阶段的一部分，获得每个路由表的收敛优先级顺序值。 然后，仅根据由收敛优先级顺序值表示的顺序为路由表执行收敛阶段。 因此，收敛进展得更快，其他路由进程所需的值越来越早。

公开(公告)号：US20250109114A1

公开(公告)日：2025-04-03

申请号：US18374663

申请日：2023-09-29

Applicant: BRAJA SUNDAR PRADHAN ,  NEHA MEHTA ,  KEYUR PATEL

Inventor： BRAJA SUNDAR PRADHAN ,  NEHA MEHTA ,  KEYUR PATEL

IPC: C07D271/12

Abstract: Embodiments of this disclosure describe a method for synthesizing potassium 5,7-dinitro-[2,1,3]-benzoxadiazol-4-olate-3-oxide (benzofuroxan derivative). In the method, a nucleophilic displacement reaction was conducted between sodium azide and 3-chloro-2,4,6-trinitrophenol. The reaction was performed at a controlled temperature using a suitable reaction medium consisting of water and methanol. After the completion of the reaction, the mixture was allowed to cool down to room temperature. On further cooling, a solid precipitated out of the reaction mixture. The solid is filtered and air-dried to give the sodium analogue of the benzofuroxa derivative. The analogue is a crucial precursor of the benzofuroxan derivative. The sodium cation is subsequently replaced with potassium by carrying the precursor through a series of operations. First, it was treated with a methanolic hydrochloric acid. The treatment removed the sodium cation and introduced a proton in its place. Sodium chloride thus was filtration off. The filtrate was concentrated under reduced pressure to obtain the penultimate precursor of the benzofuroxan derivative. Finally, the precursor was treated with potassium tert-butoxide to yield a benzofuroxan derivative in good yield and purity.

公开(公告)号：US20250100979A1

公开(公告)日：2025-03-27

申请号：US18372282

申请日：2023-09-25

Applicant: BRAJA SUNDAR PRADHAN ,  NEHA MEHTA ,  KEYUR PATEL

Inventor： BRAJA SUNDAR PRADHAN ,  NEHA MEHTA ,  KEYUR PATEL

IPC: C07D257/06

Abstract: Embodiments of this disclosure describe a novel method for synthesizing a tetrazole derivative. The distinguishing feature lies in using aminoguanidine nitrate or aminoguanidine bicarbonate as the starting material, replacing the highly sensitive tetrazine. In a single operational step, the aqueous solution of the starting material is treated with sodium nitrite. The treatment resulted in the precipitation a solid product. Without isolating the intermediate, the solid is subjected undergoes Sandmeyer reaction conditions in-situ, involving nitric acid and sodium nitrite. The resulting solid is filtered, washed with cold water and isopropyl alcohol, and dried to obtain the tetrazole derivative. By eliminating the safety risks associated with the Hamiltonian precursor and streamlining the process, the invention offers a safer, more efficient, and commercially viable method for synthesizing the tetrazole derivative.

公开(公告)号：US10558544B2

公开(公告)日：2020-02-11

申请号：US13026351

申请日：2011-02-14

Applicant: Karla K. Arndt ,  James M. Caffrey ,  Keyur Patel ,  Aspen L. Payton

Inventor： Karla K. Arndt ,  James M. Caffrey ,  Keyur Patel ,  Aspen L. Payton

IPC: G06F19/00 ,  G06F11/30

Abstract: Techniques are described for monitoring a performance metric. A multiple modeling approach is used to improve predictive analysis by avoiding the issuance of warnings during spikes which occur as a part of normal system processing. This approach increases the accuracy of predictive analytics on a monitored computing system, does not require creating rules defining periodic processing cycles, reduces the amount of data required to perform predictive modeling, and reduces the amount of CPU required to perform predictive modeling.

公开(公告)号：US20160021015A1

公开(公告)日：2016-01-21

申请号：US14335622

申请日：2014-07-18

Applicant: Samir D. Thoria ,  Keyur Patel ,  Ali Sajassi

Inventor： Samir D. Thoria ,  Keyur Patel ,  Ali Sajassi

IPC: H04L12/851 ,  H04L12/46

CPC classification number: H04L47/2483 ,  H04L12/4633 ,  H04L45/32 ,  H04L45/50

Abstract: In one embodiment, a method includes obtaining, at a first provider edge (PE) included a plurality of PEs multi-homed to a first customer edge (CE), traffic intended for the first CE, wherein the traffic includes a first indication, the first indication being configured to identify the traffic as flood traffic. A forwarding PE included in the plurality of PEs suitable to use to forward the traffic to the first CE is identified based on identifying traffic as the flood traffic. The method also includes determining whether the first PE is the forwarding PE, and providing the traffic to the first CE using the first PE when it is determined that the first PE is the forwarding PE. When it is determined that the first PE is not the forwarding PE, the traffic is filtered using the first PE.

Abstract translation: 在一个实施例中，一种方法包括在包括多归属于第一客户边缘（CE）的多个PE的第一提供者边缘（PE）处获得旨在用于第一CE的流量，其中流量包括第一指示， 第一指示被配置为将流量识别为洪泛流量。 基于将流量识别为洪泛流量，识别适合于将流量转发到第一CE的多个PE中包括的转发PE。 该方法还包括确定第一PE是否是转发PE，并且当确定第一PE是转发PE时，使用第一PE将流量提供给第一CE。 当确定第一PE不是转发PE时，使用第一PE过滤流量。

公开(公告)号：US20150312133A1

公开(公告)日：2015-10-29

申请号：US14263738

申请日：2014-04-28

Applicant: Dhananjaya Rao ,  Keyur Patel

Inventor： Dhananjaya Rao ,  Keyur Patel

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/723

CPC classification number: H04L45/04 ,  H04L12/4641 ,  H04L45/02 ,  H04L45/50

Abstract: In one embodiment, an autonomous system border router (ASBR) advertises a same forwarding label for received advertised routes of a merging context that were advertised with a same forwarding label for the ASBR to use when sending corresponding packets. An ASBR receives via a routing protocol from a particular router in the same autonomous system, a plurality of same-labeled received routes advertised with a same first forwarding label within a merging context. In response to each of the plurality of same-labeled received routes having the same first forwarding label to use to forward packets to the particular router and being in the same merging context, the ASBR determines a merged forwarding label and advertises to a peer ASBR in another autonomous system (AS) each of the plurality of same-labeled received routes with the merged forwarding label for the peer ASBR to use to forward packets to the ASBR.

Abstract translation: 在一个实施例中，自治系统边界路由器（ASBR）通过相同的转发标签通告用于ASBR在发送相应分组时使用的合并上下文的接收的通告路由的相同转发标签。 ASBR经由来自同一自治系统中的特定路由器的路由协议接收多个相同标记的接收路由，其在合并上下文中以相同的第一转发标签通告。 响应于具有相同的第一转发标签的多个相同标记的接收到的路由中的每一个被用于将数据包转发到特定路由器并处于相同的合并上下文中，ASBR确定合并的转发标签，并通告给对等体ASBR 所述多个相同标记的接收路由中的每一个具有用于对等ASBR用于将分组转发到ASBR的合并转发标签的另一自治系统（AS）。