公开(公告)号：US09185025B2

公开(公告)日：2015-11-10

申请号：US13531236

申请日：2012-06-22

Applicant: Sriganesh Kini ,  Hector Avalos

Inventor： Sriganesh Kini ,  Hector Avalos

IPC: H04L12/26 ,  H04L12/703 ,  H04L12/707 ,  H04L12/723

CPC classification number: H04L45/28 ,  H04L45/22 ,  H04L45/50

Abstract: A primary border node (BN) and a standby BN are provided for internetworking two network domains, such that connectivity between the two network domains is maintained when a failure occurs in one of the network domains. The two network domains include an access network that implements MPLS-TP and a core network that implements IP, MPLS, or a combination of both. The primary BN establishes a tunnel from itself to the standby BN, and re-directs network data traffic from itself to the standby BN via the tunnel when it detects that an access node has switched connection from the primary VN to the standby BN. The primary BN also monitors its connections to the core network, and signals access nodes to switch to the standby BN if a failure is detected in these connections.

Abstract translation: 提供主边界节点（BN）和备用BN用于互联网络化两个网络域，使得当网络域中的一个发生故障时，维持两个网络域之间的连接。 两个网络域包括实现MPLS-TP的接入网络和实现IP，MPLS或两者的组合的核心网络。 主要BN建立从自己到备用BN的隧道，并且当它检测到接入节点已经从主VN到备用BN的连接已经切换时，通过隧道将网络数据业务自身重新定向到备用BN。 主要BN还监视其与核心网络的连接，并且如果在这些连接中检测到故障，则信号接入节点切换到备用BN。

公开(公告)号：US08842550B2

公开(公告)日：2014-09-23

申请号：US13619559

申请日：2012-09-14

Applicant: Sriganesh Kini ,  Rishi Mehta

Inventor： Sriganesh Kini ,  Rishi Mehta

IPC: G06F11/00 ,  H04L12/26 ,  H04L12/24 ,  H04L29/12

CPC classification number: H04L41/0627 ,  H04L41/06 ,  H04L43/0811 ,  H04L61/2528

Abstract: A first network element that is to be coupled with a second network element over a first network in the same domain is described. The first network element includes a connectivity check detection module and a connectivity check fault state change module. The connectivity check detection module detects, according to a first protocol, a connectivity status of a local maintenance endpoint on a second network changing between not active and active. The connectivity check fault state change module creates and sends a first fault state change message, according to a second protocol, in response to the connectivity status of the local maintenance endpoint changing from not active to active instead of forwarding connectivity check messages periodically received by the first network element to a remote maintenance endpoint coupled to the second network element over a third network.

Abstract translation: 描述了要在相同域中的第一网络上与第二网络元件耦合的第一网元。 第一网元包括连接检查检测模块和连通性检查故障状态改变模块。 连接检查检测模块根据第一协议检测第二网络上的本地维护端点在不活动和活动之间的连接状态。 根据第二协议，连接性检查故障状态改变模块响应于本地维护端点从不活动状态改变为活动而不是转发定期接收的连接性检查消息而创建并发送第一故障状态改变消息 第一网络元件连接到通过第三网络耦合到第二网络元件的远程维护端点。

公开(公告)号：US08817601B2

公开(公告)日：2014-08-26

申请号：US13217992

申请日：2011-08-25

Applicant: Sriganesh Kini ,  Rishi Mehta

Inventor： Sriganesh Kini ,  Rishi Mehta

IPC: H04L12/26 ,  G01R31/08 ,  H04L12/44 ,  H04L12/24 ,  H04L12/28

CPC classification number: H04L43/0811 ,  H04L12/2859 ,  H04L12/44 ,  H04L41/0654

Abstract: Techniques for recovering from hierarchical virtual private LAN service (HVPLS) hub connectivity failure with a dynamic spoke pseudowire. According to one embodiment of the invention, a provider edge (PE) network element in the HVPLS hub monitors for a failure of HVPLS hub connectivity failure and reuses an HVPLS spoke connectivity failure recovery mechanism in an MTU by fabricating failure of one or more spoke facing connectivity elements coupling the MTU with the PE network element causing the MTU to transition to a secondary PE network element in the HVPLS hub. In addition, the PE network element establishes a dynamic spoke pseudowire for each virtual instance affected with the MTU to restore HVPLS hub connectivity for that PE network element.

Abstract translation: 使用动态辐条伪线从层次化虚拟专用局域网服务（HVPLS）集线器连接故障中恢复的技术。 根据本发明的一个实施例，HVPLS集线器中的提供商边缘（PE）网元监视HVPLS集线器连接故障的故障，并且通过制造一个或多个辐条面对的故障来重新使用MTU中的HVPLS辐条连接故障恢复机制 连接元件将MTU与PE网络元件相连，导致MTU过渡到HVPLS集线器中的辅助PE网络元件。 此外，PE网络元件为受MTU影响的每个虚拟实例建立动态辐条伪线，以恢复该PE网络元件的HVPLS集线器连接。

公开(公告)号：US08339942B2

公开(公告)日：2012-12-25

申请号：US12580019

申请日：2009-10-15

Applicant: Hua Autumn Liu ,  Venkatesan Pradeep ,  Sriganesh Kini

Inventor： Hua Autumn Liu ,  Venkatesan Pradeep ,  Sriganesh Kini

IPC: G01R31/08 ,  G01F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

CPC classification number: H04L45/00 ,  H04L45/026 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L47/70 ,  H04L47/724 ,  H04L47/746 ,  H04L47/825

Abstract: According to one embodiment, in response to at least one of a link failure and node failure of a protected label switched path (LSP), network traffic is switched onto a protection path according to a fast re-reroute (FRR) scheme. A HELLO session is established with the remote node that is not immediately adjacent to the network element, including exchanging one or more HELLO messages with the remote node, each HELLO message having a time-to-live (TTL) value of greater than one if IP forwarding is used. The TTL value of the HELLO message is set to one if the HELLO message is sent via tunnel. In response to a request to restart, a resource reservation protocol (RSVP) traffic engineering (TE) graceful restart (GR) procedure is performed using information obtained from the one or more HELLO messages exchanged with the remote node during the HELLO session.

Abstract translation: 根据一个实施例，响应于受保护标签交换路径（LSP）的链路故障和节点故障中的至少一个，根据快速重路由（FRR）方案将网络业务切换到保护路径。 与不紧邻网络元件的远程节点建立HELLO会话，包括与远程节点交换一个或多个HELLO消息，每个HELLO消息具有大于1的生存时间（TTL）值if 使用IP转发。 如果通过隧道发送HELLO消息，则HELLO消息的TTL值被设置为1。 响应于重新启动的请求，使用在HELLO会话期间与远程节点交换的一个或多个HELLO消息获得的信息执行资源预留协议（RSVP）流量工程（TE）平滑重启（GR）过程）。

公开(公告)号：US20120008632A1

公开(公告)日：2012-01-12

申请号：US12834735

申请日：2010-07-12

Applicant: Hua Autumn Liu ,  Sriganesh Kini

Inventor： Hua Autumn Liu ,  Sriganesh Kini

IPC: H04L12/28

CPC classification number: H04L47/724 ,  H04L45/22 ,  H04L45/50 ,  H04L47/726 ,  H04L47/825 ,  H04L47/828

Abstract: A method to optimize resource allocation in a network employing MPL S, the method including the steps of communicating with a second node to establish a first LSP that includes a first node and the second node using an extension of RSVP-TE in a first RSVP-TE session having a group identifier. A resource controllable by the network element is allocated to the first LSP and is associated with the group identifier. The steps including communicating with a third node in the network to establish a second LSP that includes the first node and the third node using the extension of RSVP-TE through a second RSVP-TE session that is different than the first session and has the same group identifier. The resource is shared between the first LSP and the second LSP, because the same group identifier is associated with the first RSVP-TE session and second RSVP-TE session.

Abstract translation: 一种用于优化使用MPL S的网络中的资源分配的方法，所述方法包括以下步骤：与第二节点进行通信，以在第一RSVP-TE中使用RSVP-TE的扩展来建立包括第一节点的第一LSP和所述第二节点， TE会话具有组标识符。 由网元控制的资源被分配给第一LSP并与组标识符相关联。 所述步骤包括与所述网络中的第三节点进行通信，以通过与所述第一会话不同的第二RSVP-TE会话来建立包括所述第一节点和所述第三节点的第二LSP，所述第二节点使用RSVP-TE的扩展，并且具有相同 组标识符 由于相同的组标识符与第一RSVP-TE会话和第二RSVP-TE会话相关联，所以资源在第一LSP和第二LSP之间共享。

公开(公告)号：US20110261812A1

公开(公告)日：2011-10-27

申请号：US12824072

申请日：2010-06-25

Applicant: Sriganesh Kini ,  David Sinicrope

Inventor： Sriganesh Kini ,  David Sinicrope

IPC: H04L12/56

CPC classification number: H04L12/4633 ,  H04L45/50 ,  H04L45/68 ,  H04L69/16 ,  H04L69/22 ,  H04L2212/00

Abstract: Improving efficiency of encapsulation for packets of a first set of one or more protocols on a packet-pseudowire over a tunnel in a Packet Switched Network (PSN) is described. A first provider edge (PE) network element is coupled with a customer edge (CE) network element over an attachment circuit and is coupled with a second PE network element over the packet-pseudowire. The first provider edge network element receives a frame from the CE network element over the attachment circuit. Responsive to the first PE network element determining that the frame encapsulates a packet of the first set of protocols, the first PE network element encapsulates the packet into a protocol data unit for transmission over the packet-pseudowire without including substantially all of the plurality of fields of the data link layer header. The first PE network element transmits the protocol data unit over the packet-pseudowire over the PSN tunnel to the second PE network element. Efficiency is improved through a reduction of overhead on the packet-pseudowire by removing substantially all the fields of the data link layer header of the first frame.

Abstract translation: 描述了在分组交换网络（PSN）中通过隧道在分组伪线上提高第一组一个或多个协议的分组的封装效率。 第一提供商边缘（PE）网络元件通过附件电路与客户边缘（CE）网络元件耦合，并且通过分组伪线耦合到第二PE网络元件。 第一提供商边缘网元通过附件电路从CE网元接收帧。 响应于第一PE网络元件确定帧封装第一组协议的分组，第一PE网络元件将分组封装成协议数据单元，以在分组伪线上传输，而不包括基本上所有的多个字段 的数据链路层头。 第一PE网元通过PSN隧道上的分组伪线发送协议数据单元到第二PE网元。 通过去除第一帧的数据链路层报头的基本上所有的字段，通过减少分组伪线上的开销来提高效率。

公开(公告)号：US08018863B2

公开(公告)日：2011-09-13

申请号：US12207065

申请日：2008-09-09

Applicant: Sriganesh Kini ,  Rishi Mehta

Inventor： Sriganesh Kini ,  Rishi Mehta

IPC: G01R31/08

CPC classification number: H04L43/0811 ,  H04L12/4641 ,  H04L43/10

Abstract: A method and apparatus for reducing the number of CC messages transmitted in a provider network. In one embodiment of the invention, a first service provider network element receives CC messages from a first customer network at a first periodicity rate. The first service provider network element stores the received CC messages and reduces the first periodicity rate to create a second periodicity rate that is smaller than the first periodicity rate. The first service provider network element transmits CC messages to a second service provider network element through the provider network at the second periodicity rate. Other methods and apparatus are also described.

Abstract translation: 一种用于减少在提供商网络中发送的CC消息的数量的方法和装置。 在本发明的一个实施例中，第一服务提供商网络单元以第一周期性速率从第一客户网络接收CC消息。 第一服务提供商网元存储所接收的CC消息并且减小第一周期率以创建小于第一周期性速率的第二周期性速率。 第一服务提供商网络单元以第二周期性速率通过提供商网络将CC消息发送到第二服务提供商网络元件。 还描述了其它方法和装置。

公开(公告)号：US20110205907A1

公开(公告)日：2011-08-25

申请号：US12710213

申请日：2010-02-22

Applicant: Sriganesh Kini ,  Marc Rapoport

Inventor： Sriganesh Kini ,  Marc Rapoport

IPC: H04L12/26

CPC classification number: H04L41/06 ,  H04L45/28 ,  H04L45/304 ,  H04L45/50 ,  H04L47/10

Abstract: A method performed on a network element employing Multiprotocol Label Switching (MPLS) to promulgate an alert to each Label Switch Router (LSR) along a Label Switch Path (LSP) by forwarding a labeled packet serving as an alert packet generated by an LSR in the LSP, the method including receiving the labeled packet by the network element from another LSR in the LSP, determining whether the labeled packet is the alert packet by checking a time to live value in an MPLS label header of the labeled packet, determining whether the labeled packet is an operation, administration and maintenance (OAM) packet based on a presence of a generic associated channel label, copying the labeled packet including a label stack of the labeled packet and forwarding the labeled packet to a next LSR in the LSP, whereby the latency in promulgating the alert to each of the LSRs in the LSP is reduced.

Abstract translation: 一种在采用多协议标签交换（MPLS）的网元上执行的一种方法是通过转发一个标签的数据包作为LSR生成的警报包，在标签交换路径（LSP）上向每个标签交换路由器（LSR）发布一个警报。 LSP，所述方法包括：通过所述网元从所述LSP中的另一个LSR接收所述标记的分组，通过在所述标签分组的MPLS标签报头中检查生存时间值来确定所述标记分组是否是所述报警分组， 分组是基于通用相关信道标签的存在的操作，管理和维护（OAM）分组，复制包括标记分组的标签栈的标记分组，并将标记分组转发到LSP中的下一个LSR，由此 向LSP中的每个LSR发布警报的延迟减少了。

公开(公告)号：US07948993B2

公开(公告)日：2011-05-24

申请号：US12463364

申请日：2009-05-08

Applicant: Sriganesh Kini ,  Attila Takacs

Inventor： Sriganesh Kini ,  Attila Takacs

IPC: H04L12/28 ,  H04L12/56

CPC classification number: H04L45/00 ,  H04L12/4625 ,  H04L29/12028 ,  H04L45/02 ,  H04L45/025 ,  H04L45/52 ,  H04L45/66 ,  H04L61/103

Abstract: A method and apparatus that operates two bridging protocols in a hybrid bridging node is described. The operation of the two bridging protocols in the hybrid node allows for an incremental transition of a provider bridging network from operating a legacy bridging protocol that shares MAC addresses to a bridging network that operates VPLS and/or PBB bridging protocols. The hybrid bridging node selectively broadcasts address resolution packets and unicast packets with unknown MAC addresses from the nodes operating VPLS and/or PBB to nodes operating a legacy bridging protocol.

Abstract translation: 描述了在混合桥接节点中操作两个桥接协议的方法和装置。 混合节点中的两个桥接协议的操作允许供应商桥接网络从运行共享MAC地址的传统桥接协议到运行VPLS和/或PBB桥接协议的桥接网络的增量转换。 混合桥接节点选择性地将地址解析分组和未知MAC地址的单播分组从运行VPLS和/或PBB的节点广播到运行传统桥接协议的节点。

公开(公告)号：US20090245261A1

公开(公告)日：2009-10-01

申请号：US12060122

申请日：2008-03-31

Applicant: Faisal Andre Khan ,  Sriganesh Kini

Inventor： Faisal Andre Khan ,  Sriganesh Kini

IPC: H04L12/28

CPC classification number: H04L12/4641

Abstract: Techniques for recovering from hierarchical virtual private LAN service (HVPLS) hub connectivity failure are described herein. In one embodiment of the invention, a provider edge network element reuses an HVPLS spoke connectivity failure recovery mechanism in an MTU to protect against a failure of HVPLS hub connectivity. The PE network element monitors hub facing connectivity elements and declares a hub connectivity failure upon a certain amount of those hub facing connectivity elements failing, and fabricates a failure of its spoke facing connectivity elements causing the MTU to detect an HVPLS spoke connectivity failure and switch to a secondary HVPLS spoke connection. Other methods and apparatuses are described.

Abstract translation: 本文描述了从分级虚拟专用LAN服务（HVPLS）集线器连接故障中恢复的技术。 在本发明的一个实施例中，提供商边缘网元在MTU中重新使用HVPLS辐条连接故障恢复机制，以防止HVPLS集线器连接的故障。 PE网络元件监视中枢面向连接元素，并在一定数量的面向这些中枢的连接元件发生故障时声明中枢连接性故障，并制造其辐条面向连接元件的故障，导致MTU检测到HVPLS辐条连接故障，并切换到 次级HVPLS辐条连接。 描述其他方法和装置。