公开(公告)号：US09137101B2

公开(公告)日：2015-09-15

申请号：US13303615

申请日：2011-11-23

申请人： Srikanth Keesara ,  David E. Frattura ,  Deborah E. Fitzgerald ,  Christopher Monti

发明人： Srikanth Keesara ,  David E. Frattura ,  Deborah E. Fitzgerald ,  Christopher Monti

IPC分类号： G01R31/08 ,  H04L12/24 ,  H04L12/26 ,  H04L12/721

CPC分类号： H04L41/0677 ,  H04L43/0811 ,  H04L43/10 ,  H04L45/70

摘要： A network management and monitoring application employs diagnostic messages for confirming network path connectivity and identifying and locating connectivity faults. Diagnostic messages similar to conventional “ping” and “traceroute” messages traverse the network along a prescribed path for which diagnostic feedback is desired. The application receives and analyzes return messages sent from network entities along the path to ascertain connectivity issues on the path. The application receives layer 3 identifiers such as IP addresses, however performs diagnostic operations such as continuity checks based on layer 2 identifiers such as MAC (Media Access Control) identifiers because certain network entities operate on L2 identifiers and would otherwise evade a continuity check based on layer 3 identifiers. The monitoring application therefore performs continuity diagnostics such as ping and traceroute operations using L2 identifiers, therefore pinpointing problems with an L2 network forwarding entity such as a bridge that lies between L3 entities such as routers.

摘要翻译： 网络管理和监控应用程序使用诊断消息来确认网络路径连通性，并识别和定位连接故障。 类似于常规“ping”和“traceroute”消息的诊断消息沿着期望诊断反馈的规定路径穿越网络。 应用程序接收并分析从网络实体沿路径发送的返回消息，以确定路径上的连接问题。 应用程序接收诸如IP地址的层3标识符，然而执行诊断操作，例如基于诸如MAC（媒体访问控制）标识符的第2层标识符的连续性检查，因为某些网络实体在L2标识符上操作，否则将基于 第3层标识符。 因此，监视应用程序使用L2标识符来执行诸如ping和traceroute操作之类的连续性诊断，因此确定了L2网络转发实体（例如位于诸如路由器的L3实体之间的网桥）的问题。

公开(公告)号：US08830998B2

公开(公告)日：2014-09-09

申请号：US13242422

申请日：2011-09-23

申请人： Srikanth Keesara ,  Gautam Khera ,  Rama Apalla

发明人： Srikanth Keesara ,  Gautam Khera ,  Rama Apalla

IPC分类号： H04L12/28

CPC分类号： H04L45/66

摘要： Techniques disclosed herein include systems and methods for providing a scalable solution to transmit edge IP Multicast sender information in a Shortest Path Bridging (SPB) network. Control information is exchanged between Ingress Backbone Edge Bridges and Egress Backbone Edge Bridges Such control messages do not cause path computations at Backbone Core Bridges within the SPB network. Such exchanges of control messages trigger sending SPB specific Intermediate System To Intermediate System (IS-IS) TLV control message with path computation information via IS-IS control messages. This second set of control messages is exchanged within the SPB network and includes source-specific multicast stream information that is used by Backbone Core Bridges to establish a multicast forward state and compute multicast forwarding paths. By separating edge and routing information, IP multicasting functionality within the SPB is provided while enabling scaling and new edge multicasting applications.

摘要翻译： 本文公开的技术包括用于提供可扩展解决方案以在最短路径桥接（SPB）网络中传送边缘IP多播发送者信息的系统和方法。 Ingress Backbone Edge Bridges与出口Backbone Edge Bridge之间交换控制信息这样的控制消息不会在SPB网络内的Backbone Core Bridges处引起路径计算。 这种交换控制消息通过IS-IS控制消息触发发送SPB特定的具有路径计算信息的中间系统到中间系统（IS-IS）TLV控制消息。 该第二组控制消息在SPB网络内进行交换，包括由Backbone Core Bridges用于建立组播转发状态并计算组播转发路径的源特定组播流信息。 通过分离边缘和路由信息，提供SPB内的IP组播功能，同时实现缩放和新的边缘多播应用。

公开(公告)号：US08804722B2

公开(公告)日：2014-08-12

申请号：US13242686

申请日：2011-09-23

申请人： Rama Suryanarayana Appalla ,  Roger Lapuh ,  Srikanth Keesara

发明人： Rama Suryanarayana Appalla ,  Roger Lapuh ,  Srikanth Keesara

IPC分类号： H04L12/28

CPC分类号： H04L12/185 ,  H04L12/1836 ,  H04L45/04 ,  H04L45/12 ,  H04L45/16

摘要： A method and apparatus for routing multicast data across multiple multicast routing domains connected by a shortest path bridging (SPB) network is presented. A Shortest Path Bridging (SPB) edge router of an SPB network connected to a PIM network is configured as a Rendezvous Point (RP). A message is received at the RP, and in response, the RP forms a first data structure including multicast sender information. The RP floods the SPB network with a second message containing the first data structure, allocates an Identifier to the multicast stream, and sends a second data structure with sender information. An edge router with multicast receive interest responds with the second data structure with multicast receive interest information. As a result, a receiver in a second network has knowledge of devices in a first network such that multicast traffic is able to be routed between different networks connected to the SPB network.

摘要翻译： 提出了一种通过最短路径桥接（SPB）网络连接的多个多播路由域之间路由组播数据的方法和装置。 连接到PIM网络的SPB网络的最短路径桥接器（SPB）边缘路由器配置为集合点（RP）。 在RP接收到消息，作为响应，RP形成包括多播发送者信息的第一数据结构。 RP通过包含第一个数据结构的第二个消息洪泛SPB网络，为组播流分配一个标识符，并发送具有发送者信息的第二个数据结构。 具有组播接收兴趣的边缘路由器利用具有多播接收兴趣信息的第二数据结构进行响应。 因此，第二网络中的接收机具有第一网络中的设备的知识，使得多播业务能够在连接到SPB网络的不同网络之间路由。

公开(公告)号：US08743875B2

公开(公告)日：2014-06-03

申请号：US13242250

申请日：2011-09-23

申请人： Gautam Khera ,  Srikanth Keesara ,  Rama Apalla

发明人： Gautam Khera ,  Srikanth Keesara ,  Rama Apalla

IPC分类号： H04L12/28

CPC分类号： H04L45/16 ,  H04L12/4625 ,  H04L45/66

摘要： Techniques disclosed herein include systems and methods for improving efficiency of multicast state generation within Shortest Path Bridging (SPB) networks. Techniques include using an IS-IS TLV structure with new multicast state computation rules for SPB Networks. SPB Networks use a TLV field for the I-SID Address (and equivalent TLV fields defined in different IETF/IEEE drafts) and node nicknames to signal information that is used to compute a multicast state required to provide L2 Services over a given SPB Network. The I-SID Address TLV is set or filled to carry various items of information. These items of information can include Backbone Media Access Control (B-MAC), Virtual Local Area Network Identifier (VID), I-SID[Transmit, Receive Bit], etc.

摘要翻译： 本文公开的技术包括用于在最短路径桥接（SPB）网络中提高多播状态生成的效率的系统和方法。 技术包括对SPB网络使用具有新的多播状态计算规则的IS-IS TLV结构。 SPB网络使用用于I-SID地址（以及不同IETF / IEEE草案中定义的等价TLV字段）和节点昵称的TLV字段来信号，用于计算用于在给定SPB网络上提供L2服务所需的组播状态的信息。 I-SID地址TLV被设置或填充以携带各种信息。 这些信息项可以包括骨干媒体访问控制（B-MAC），虚拟局域网标识符（VID），I-SID [发送，接收位]等。

公开(公告)号：US08675522B2

公开(公告)日：2014-03-18

申请号：US13241869

申请日：2011-09-23

申请人： Srikanth Keesara ,  Richard Thomas Strong ,  Deborah Ellen Fitzgerald

发明人： Srikanth Keesara ,  Richard Thomas Strong ,  Deborah Ellen Fitzgerald

IPC分类号： H04Q3/545

CPC分类号： H04L12/4662 ,  H04L12/4633

摘要： Techniques disclosed herein include systems and methods for improving multicast traffic operations in a Shortest Path Bridging (SPB) network by conveying bridging domain information of an incoming interface (IIF) when transporting multicast traffic over the SPB network. Techniques disclosed herein include modifying encapsulation packet header information of existing Mac-In-Mac fields to convey additional information that can be interpreted at edge nodes by modifying edge node interpretation of multicast data. Specifically, the value of the I-SID in the BMAC-DA field can be set to be different from the I-SID value in the I-TAG field. Carrying the L2 VSN I-SID value in the I-TAG allows the Egress BEBs to determine which VLAN/L2 VSN/Bridging-Domain of the IIF is in use, and then modify or preserve underlying header information accordingly.

摘要翻译： 本文公开的技术包括当通过SPB网络传输多播流量时，通过传送输入接口（IIF）的桥接域信息来改善最短路径桥接（SPB）网络中的多播业务操作的系统和方法。 本文公开的技术包括修改现有Mac-In-Mac字段的封装分组报头信息，以传送可以通过修改多播数据的边缘节点解释来在边缘节点处解释的附加信息。 具体地说，BMAC-DA字段中的I-SID的值可以被设置为与I-TAG字段中的I-SID值不同。 在I-TAG中携带L2 VSN I-SID值允许出口BEB确定IIF的哪个VLAN / L2 VSN /桥接域正在使用，然后相应地修改或保留底层头信息。

公开(公告)号：US20140075041A1

公开(公告)日：2014-03-13

申请号：US13610321

申请日：2012-09-11

申请人： Srikanth Keesara ,  Richard Thomas Strong ,  Brian Thomas Bull

发明人： Srikanth Keesara ,  Richard Thomas Strong ,  Brian Thomas Bull

IPC分类号： G06F15/173

CPC分类号： H04L49/20 ,  H04L43/00

摘要： A mirroring configuration employs an alternate usage of an existing messaging protocol and mechanism for propagating mirroring control for remote mirroring of data streams. A source routing entity, i.e. a router or switch through which the mirrored stream passes, identifies the stream as available for monitoring. The enabled stream propagates from a source network device, typically from a router port, to a mirroring destination in addition to the addressed destination. A stream identifier emulates an identifier from an alternate usage, such as a multicast group identifier for a multicast protocol, and activates mirroring by inserting the stream identifier in publish and join messages of the multicast protocol.

摘要翻译： 镜像配置采用现有消息协议和机制的替代使用，用于传播用于数据流远程镜像的镜像控制。 源路由实体，即镜像流通过的路由器或交换机将该流标识为可用于监视。 启用的流从源网络设备（通常从路由器端口）传播到除了寻址的目的地之外的镜像目的地。 流标识符模拟来自替代使用的标识符，例如多播协议的多播组标识符，并且通过在多播协议的发布和加入消息中插入流标识符来激活镜像。

公开(公告)号：US20130128751A1

公开(公告)日：2013-05-23

申请号：US13303615

申请日：2011-11-23

申请人： Srikanth Keesara ,  David E. Frattura ,  Deborah E. Fitzgerald ,  Christopher Monti

发明人： Srikanth Keesara ,  David E. Frattura ,  Deborah E. Fitzgerald ,  Christopher Monti

IPC分类号： H04L12/26

CPC分类号： H04L41/0677 ,  H04L43/0811 ,  H04L43/10 ,  H04L45/70

摘要： A network management and monitoring application employs diagnostic messages for confirming network path connectivity and identifying and locating connectivity faults. Diagnostic messages similar to conventional “ping” and “traceroute” messages traverse the network along a prescribed path for which diagnostic feedback is desired. The application receives and analyzes return messages sent from network entities along the path to ascertain connectivity issues on the path. The application receives layer 3 identifiers such as IP addresses, however performs diagnostic operations such as continuity checks based on layer 2 identifiers such as MAC (Media Access Control) identifiers because certain network entities operate on L2 identifiers and would otherwise evade a continuity check based on layer 3 identifiers. The monitoring application therefore performs continuity diagnostics such as ping and traceroute operations using L2 identifiers, therefore pinpointing problems with an L2 network forwarding entity such as a bridge that lies between L3 entities such as routers.

摘要翻译： 网络管理和监控应用程序使用诊断消息来确认网络路径连通性，并识别和定位连接故障。 类似于常规“ping”和“traceroute”消息的诊断消息沿着期望诊断反馈的规定路径穿越网络。 应用程序接收并分析从网络实体沿路径发送的返回消息，以确定路径上的连接问题。 应用程序接收诸如IP地址的层3标识符，然而执行诊断操作，例如基于诸如MAC（媒体访问控制）标识符的第2层标识符的连续性检查，因为某些网络实体操作在L2标识符上，否则将基于 第3层标识符。 因此，监视应用程序使用L2标识符来执行诸如ping和traceroute操作之类的连续性诊断，因此确定了L2网络转发实体（例如位于诸如路由器的L3实体之间的网桥）的问题。

公开(公告)号：US20130077625A1

公开(公告)日：2013-03-28

申请号：US13242250

申请日：2011-09-23

申请人： Gautam Khera ,  Srikanth Keesara ,  Rama S. Apalla

发明人： Gautam Khera ,  Srikanth Keesara ,  Rama S. Apalla

IPC分类号： H04L12/56

CPC分类号： H04L45/16 ,  H04L12/4625 ,  H04L45/66

摘要： Techniques disclosed herein include systems and methods for improving efficiency of multicast state generation within Shortest Path Bridging (SPB) networks. Techniques include using an IS-IS TLV structure with new multicast state computation rules for SPB Networks. SPB Networks use a TLV field for the I-SID Address (and equivalent TLV fields defined in different IETF/IEEE drafts) and node nicknames to signal information that is used to compute a multicast state required to provide L2 Services over a given SPB Network. The I-SID Address TLV is set or filled to carry various items of information. These items of information can include Backbone Media Access Control (B-MAC), Virtual Local Area Network Identifier (VID), I-SID[Transmit, Receive Bit], etc.

摘要翻译： 本文公开的技术包括用于在最短路径桥接（SPB）网络中提高多播状态生成的效率的系统和方法。 技术包括对SPB网络使用具有新的多播状态计算规则的IS-IS TLV结构。 SPB网络使用用于I-SID地址（以及不同IETF / IEEE草案中定义的等价TLV字段）和节点昵称的TLV字段来信号，用于计算用于在给定SPB网络上提供L2服务所需的组播状态的信息。 I-SID地址TLV被设置或填充以携带各种信息。 这些信息项可以包括骨干媒体访问控制（B-MAC），虚拟局域网标识符（VID），I-SID [发送，接收位]等。

公开(公告)号：US20120287795A1

公开(公告)日：2012-11-15

申请号：US13561040

申请日：2012-07-29

申请人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

发明人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

IPC分类号： H04L12/26 ,  H04L29/06

CPC分类号： H04L43/10 ,  H04L41/12 ,  H04L45/02 ,  H04L63/00 ,  H04L69/00

摘要： An OAM link trace message is sent from a source node to a target node in a link state protocol controlled Ethernet network. The link trace message uses an 802.1ag format except, as a destination address, it uses either the unicast Ethernet MAC node ID of the target node or the multicast destination address of the service instance. Network topology verification in a link state protocol controlled Ethernet network checks the link state protocol database at a node to ascertain the control plane topology view of at least part of the network. One or more Ethernet OAM commands from the node are executed to ascertain the data plane topology view of the same part of the network. The control plane topology view of the network is compared to the data plane topology view of the network to see if they match. An error is flagged if they do not match.

摘要翻译： OAM链路跟踪消息从源节点发送到链路状态协议控制的以太网中的目标节点。 链路跟踪消息使用802.1ag格式，除了作为目的地址，它使用目标节点的单播以太网MAC节点ID或服务实例的组播目的地址。 链路状态协议控制的以太网网络中的网络拓扑验证检查节点处的链路状态协议数据库，以确定至少部分网络的控制平面拓扑视图。 执行来自节点的一个或多个以太网OAM命令以确定网络的相同部分的数据平面拓扑视图。 将网络的控制平面拓扑视图与网络的数据平面拓扑视图进行比较，看它们是否匹配。 如果错误不匹配，则会被标记。

公开(公告)号：US20120113817A1

公开(公告)日：2012-05-10

申请号：US13271421

申请日：2011-10-12

申请人： Deborah E. Fitzgerald ,  Srikanth Keesara

发明人： Deborah E. Fitzgerald ,  Srikanth Keesara

IPC分类号： H04L12/26

CPC分类号： H04L41/12 ,  H04L43/10

摘要： A Shortest Path Bridging (SPB) network provides a multicast traceroute using network identifiers such as IP addresses for the source and destination (multicast group). The network identifiers, which are based on layer 3 (IP) designations of the traced multicast group, are mapped to a network identifier of the multicast group (corresponding to a layer 2, or MAC address) and an associated Virtual Local Area Network (VLAN) which is used to transport the packets belonging to the multicast flow. Therefore, an operator issuing the traceroute command need not be familiar with the layer 2 concepts of the network, but rather need only supply the layer 3 (IP address) designations of the concerned entities.15

摘要翻译： 最短路径桥接（SPB）网络使用诸如源和目的地（组播组）的IP地址等网络标识符来提供组播跟踪路由。 基于跟踪的组播组的第3层（IP）指定的网络标识符被映射到组播组的网络标识符（对应于第2层或MAC地址）和相关联的虚拟局域网（VLAN） ），用于传输属于多播流的数据包。 因此，发布traceroute命令的运营商不需要熟悉网络的第2层概念，而只需要提供相关实体的第3层（IP地址）名称。 15