公开(公告)号：US20120082025A1

公开(公告)日：2012-04-05

申请号：US13315948

申请日：2011-12-09

申请人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

发明人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

IPC分类号： H04L12/26

CPC分类号： H04L45/04 ,  H04L1/22 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/68

摘要： The protection of multi-segment pseudowires by utilizing backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a backup path is chosen, and reachability information associated with the chosen backup path is signaled across the backup path before reverse traffic is switched to the backup path. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire.

摘要翻译： 本文公开了通过利用备用路径保护多段伪线。 公开的实施例包括为多段伪线建立至少一个备用路径的方法，该建立是在检测到主路径中的故障之前执行的。 在检测到路径故障时，将检测到的故障信号发送到前端，选择备份路径，并且在将反向流量切换到备份路径之前通过备份路径发信号通知所选备份路径的可达性信息。 在其他公开的实施例中，设备被配置为在检测到主路径中的故障之前建立用于多段伪线的至少一个备用路径。

公开(公告)号：US07885294B2

公开(公告)日：2011-02-08

申请号：US11844119

申请日：2007-08-23

申请人： Keyur Patel ,  Abhay Roy ,  Robert Raszuk

发明人： Keyur Patel ,  Abhay Roy ,  Robert Raszuk

IPC分类号： H04J3/18

CPC分类号： H04L45/04 ,  H04L69/04

摘要： An ability to compress packets is announced from a customer edge router (CE) to other CEs through a routing protocol packet. An announcement of that ability is received from another CE through a routing protocol packet. A compression technique is then matched. The CE receives compression information from the other CE in a routing protocol packet, and determines that a compression technique identified therein matches any compression technique the CE is programmed to use. The CE then flags packets transmitted from/received by the CE to be compressed/decompressed according to the matched compression technique. Alternatively, the CE may match by transmitting compression information identifying a compression technique to the another CE in a routing protocol packet; the another CE receives the routing protocol packet and determines that a compression technique identified in the compression information of the routing protocol packet matches any compression technique the another CE is programmed to use.

摘要翻译： 通过路由协议包从客户边缘路由器（CE）到其他CE，宣布压缩数据包的能力。 通过路由协议包从另一个CE接收到该能力的通知。 然后匹配压缩技术。 CE在路由协议分组中从其他CE接收压缩信息，并确定其中识别的压缩技术与CE被编程使用的任何压缩技术相匹配。 CE然后根据匹配的压缩技术标记由CE发送/接收的数据包以进行压缩/解压缩。 或者，CE可以通过在路由协议分组中向另一CE发送标识压缩技术的压缩信息来匹配; 另一个CE接收路由协议分组，并确定在路由协议分组的压缩信息中识别的压缩技术与另一个CE被编程使用的任何压缩技术匹配。

公开(公告)号：US07688819B2

公开(公告)日：2010-03-30

申请号：US11369262

申请日：2006-03-06

申请人： Anantha Ramaiah ,  Keyur Patel ,  David D. Ward ,  Robert Raszuk

发明人： Anantha Ramaiah ,  Keyur Patel ,  David D. Ward ,  Robert Raszuk

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/04 ,  H04L45/02

摘要： 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.

摘要翻译： 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：US07675912B1

公开(公告)日：2010-03-09

申请号：US11175461

申请日：2005-07-05

申请人： David D. Ward ,  Robert Raszuk ,  Keyur Patel

发明人： David D. Ward ,  Robert Raszuk ,  Keyur Patel

IPC分类号： H04L12/28

CPC分类号： H04L45/04 ,  H04L45/02 ,  H04L45/026

摘要： A method is disclosed for Border Gateway Protocol (BGP) service auto discovery. A first message is received from a first BGP host. The first message comprises first information that indicates that the first BGP host provides reachability information associated with one or more route types. The first information is stored. The first information is sent in a second message to a second BGP host, where the first BGP host and the second BGP host are not conducting a BGP peering session.

摘要翻译： 公开了一种用于边界网关协议（BGP）服务自动发现的方法。 从第一个BGP主机接收到第一个消息。 第一消息包括指示第一BGP主机提供与一个或多个路由类型相关联的可达性信息的第一信息。 第一个信息被存储。 第一个信息被发送到第二个BGP主机，第二个BGP主机和第二个BGP主机不进行BGP对等体会话。

公开(公告)号：US20080219153A1

公开(公告)日：2008-09-11

申请号：US11518405

申请日：2006-09-08

申请人： Mike Shand ,  Stewart F. Bryant ,  David D. Ward ,  Gargi Nalawade ,  Keyur Patel ,  Stefano B. Previdi ,  Robert Raszuk

发明人： Mike Shand ,  Stewart F. Bryant ,  David D. Ward ,  Gargi Nalawade ,  Keyur Patel ,  Stefano B. Previdi ,  Robert Raszuk

IPC分类号： G01R31/08

CPC分类号： H04L45/22 ,  H04L45/04 ,  H04L45/28

摘要： An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.

摘要翻译： 描述的用于构建修复路径的装置和方法，用于在数据通信网络的第一和第二路由域中的各个组件之间的路由间域间连接发生故障的情况下使用。 该装置被配置为分配可传播的修复地址，用于在路由间连接域连接失败的情况下使用，并且经由除了路由间连接之外的数据通信网络组件来传播修复地址。

公开(公告)号：US20080062861A1

公开(公告)日：2008-03-13

申请号：US11518382

申请日：2006-09-08

申请人： Mike Shand ,  Stewart F. Bryant ,  David D. Ward ,  Gargi Nalawade ,  Robert Raszuk ,  Keyur Patel ,  Clarence Filsfils ,  Stefano B. Previdi

发明人： Mike Shand ,  Stewart F. Bryant ,  David D. Ward ,  Gargi Nalawade ,  Robert Raszuk ,  Keyur Patel ,  Clarence Filsfils ,  Stefano B. Previdi

IPC分类号： H04J3/14

CPC分类号： H04L45/04 ,  H04L45/02 ,  H04L45/28

摘要： In one embodiment, an apparatus and method are described for constructing a repair path in the event of non-availability of a routing domain component of a routing domain comprising, as components, links and nodes. The apparatus is arranged to receive respective network repair addresses from each of the far-side and near-side advertising node for use in the event of non-availability of a routing domain component between the advertising node. The apparatus is further arranged to advertise the near-side advertising node network repair address to one or more far-side nodes via a path external to the routing domain.

摘要翻译： 在一个实施例中，描述了在路由域的路由域组件的不可用性的情况下构建修复路径的装置和方法，该路由域组件包括作为组件的链路和节点。 该装置被安排为从广播节点和广播节点之间的路由域组件不可用的情况下接收来自远侧和近侧广告节点的相应网络修复地址。 该装置还被布置成经由路由域外部的路径将近侧广告节点网络修复地址通告给一个或多个远侧节点。

公开(公告)号：US20060245374A1

公开(公告)日：2006-11-02

申请号：US11117223

申请日：2005-04-28

申请人： Keyur Patel ,  Ruchi Kapoor ,  James Guichard

发明人： Keyur Patel ,  Ruchi Kapoor ,  James Guichard

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/04 ,  H04L45/02

摘要： A method, apparatus and computer program product 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.

摘要翻译： 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，设备和计算机程序产品。 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：US10558544B2

公开(公告)日：2020-02-11

申请号：US13026351

申请日：2011-02-14

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

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

IPC分类号： G06F19/00 ,  G06F11/30

摘要： 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：US20150312133A1

公开(公告)日：2015-10-29

申请号：US14263738

申请日：2014-04-28

申请人： Dhananjaya Rao ,  Keyur Patel

发明人： Dhananjaya Rao ,  Keyur Patel

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

CPC分类号： H04L45/04 ,  H04L12/4641 ,  H04L45/02 ,  H04L45/50

摘要： 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.

摘要翻译： 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）。

公开(公告)号：US08750099B2

公开(公告)日：2014-06-10

申请号：US13329113

申请日：2011-12-16

申请人： Keyur Patel ,  Robert Raszuk

发明人： Keyur Patel ,  Robert Raszuk

IPC分类号： H04L12/26

CPC分类号： H04L45/04 ,  H04L45/22 ,  H04L45/28

摘要： Techniques are disclosed for providing fast convergence on Autonomous System Border Routers (ASBRs). In an embodiment, an ASBR receives first Virtual Private Network (VPN) route information including a first route target, a first route distinguisher, and a first network prefix and second VPN route information including a second route target, a second route distinguisher and a second network prefix. The second route distinguisher received by the ASBR is different than the first route distinguisher. The ASBR compares the first route target to the second route target and the first network prefix with the second network prefix. In response to determining that the first route target matches the second route target and the first network prefix matches the second network prefix, the ASBR associates, in a routing table, a first path based on the first VPN route information with a second path based on the second VPN route information.

摘要翻译： 公开了用于在自治系统边界路由器（ASBR）上提供快速融合的技术。 在一个实施例中，ASBR接收包括第一路由目标，第一路由识别器和第一网络前缀的第一虚拟专用网（VPN）路由信息和包括第二路由目标的第二VPN路由信息，第二路由标识符和第二路由标识符 网络前缀。 由ASBR接收的第二个路由标识符与第一个路由标识符不同。 ASBR将第一个路由目标与第二个路由目标进行比较，第一个网络前缀与第二个网络前缀进行比较。 响应于确定第一路由目标与第二路由目标匹配，并且第一网络前缀与第二网络前缀匹配，ASBR在路由表中将基于第一VPN路由信息的第一路径与基于 第二条VPN路由信息。