公开(公告)号：US08724456B1

公开(公告)日：2014-05-13

申请号：US12881999

申请日：2010-09-14

申请人： Bin William Hong ,  Apurva Mehta ,  Ramanarayanan Ramakrishnan ,  Huaxiang Sun ,  Prakash Kamath

发明人： Bin William Hong ,  Apurva Mehta ,  Ramanarayanan Ramakrishnan ,  Huaxiang Sun ,  Prakash Kamath

IPC分类号： G06F11/00

CPC分类号： G06F11/00

摘要： Techniques are described for selecting an alternate path for end-to-end service data traffic that traverses multi-homed routers that provide the service to customer networks. For example, as described herein, a router that is a member of a first multi-homing set connected to a layer two (L2) network with one of a plurality of first access links. The router advertises a status of one of the first access links to a second multi-homing set connected to the first multi-homing set with one or more core links. A core link database stores advertised status information for access links of the first and second multi-homing set. Upon a link failure, a path selector selects a core link to transport service data traffic and directs a switch module to switch to active a status a first access links that connects to a router in the first multi-homing set connected to the selected core link.

摘要翻译： 描述技术来选择用于通过向客户网络提供服务的多归属路由器的端到端服务数据业务的备用路径。 例如，如本文所述，路由器是与多个第一接入链路中的一个连接到第二层（L2）网络的第一多归属集合的成员。 路由器将具有一个第一接入链路的状态通告给具有一个或多个核心链路的连接到第一多归属集的第二多归属集。 核心链路数据库存储用于第一和第二多归属集合的接入链路的通告状态信息。 在链路故障时，路径选择器选择核心链路来传输服务数据流量并指示交换机模块切换到活动状态，连接到连接到所选核心链路的第一多归属集中的路由器的第一接入链路 。

公开(公告)号：US08199753B2

公开(公告)日：2012-06-12

申请号：US12478857

申请日：2009-06-05

申请人： Apurva Mehta ,  Kumar Mehta ,  Krishna Sankaran ,  Rajagopalan Subbiah ,  Ramanarayanan Ramakrishnan ,  Bin William Hong ,  Ananda Sathyanarayana

发明人： Apurva Mehta ,  Kumar Mehta ,  Krishna Sankaran ,  Rajagopalan Subbiah ,  Ramanarayanan Ramakrishnan ,  Bin William Hong ,  Ananda Sathyanarayana

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/00 ,  H04L12/4625 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/16 ,  H04L45/48 ,  H04L45/66

摘要： Methods, apparatus, and products are disclosed for forwarding frames in a computer network using shortest path bridging (‘SPB’). The network includes multiple bridges, and each edge bridge is assigned a unique service virtual local area network (‘VLAN’) identifier. One of the bridges receives a frame for transmission to a destination node. The received frame includes a service VLAN identifier for the ingress bridge through which the frame entered the network and a customer VLAN identifier. The one bridge identifies an SPB forwarding tree in dependence upon the service VLAN identifier. The SPB forwarding tree specifies a shortest route in the network from the ingress bridge through the one bridge to the other bridges in the network. The one bridge then forwards the received frame to the egress bridge without MAC-in-MAC encapsulation in dependence upon the SPB forwarding tree and the customer VLAN identifier.

摘要翻译： 公开了使用最短路径桥接（“SPB”）在计算机网络中转发帧的方法，装置和产品。 该网络包括多个网桥，每个边缘网桥被分配一个唯一的服务虚拟局域网（“VLAN”）标识符。 其中一个桥接收到用于传输到目标节点的帧。 接收到的帧包括帧进入网络的入口网桥的服务VLAN标识符和客户VLAN标识符。 一个桥接器根据服务VLAN标识符标识SPB转发树。 SPB转发树指定网络中从入口网桥通过一个网桥到网络中其他网桥的最短路由。 然后，一个桥将接收到的帧转发到出口网桥，而不依赖于SPB转发树和客户VLAN标识符的MAC-in-MAC封装。

公开(公告)号：US20100309912A1

公开(公告)日：2010-12-09

申请号：US12478857

申请日：2009-06-05

申请人： Apurva Mehta ,  Kumar Mehta ,  Krishna Sankaran ,  Rajagopalan Subbiah ,  Ramanarayanan Ramakrishnan ,  Bin William Hong ,  Ananda Sathyanarayana

发明人： Apurva Mehta ,  Kumar Mehta ,  Krishna Sankaran ,  Rajagopalan Subbiah ,  Ramanarayanan Ramakrishnan ,  Bin William Hong ,  Ananda Sathyanarayana

IPC分类号： H04L12/56

CPC分类号： H04L45/00 ,  H04L12/4625 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/16 ,  H04L45/48 ,  H04L45/66

摘要： Methods, apparatus, and products are disclosed for forwarding frames in a computer network using shortest path bridging (‘SPB’). The network includes multiple bridges, and each edge bridge is assigned a unique service virtual local area network (‘VLAN’) identifier. One of the bridges receives a frame for transmission to a destination node. The received frame includes a service VLAN identifier for the ingress bridge through which the frame entered the network and a customer VLAN identifier. The one bridge identifies an SPB forwarding tree in dependence upon the service VLAN identifier. The SPB forwarding tree specifies a shortest route in the network from the ingress bridge through the one bridge to the other bridges in the network. The one bridge then forwards the received frame to the egress bridge without MAC-in-MAC encapsulation in dependence upon the SPB forwarding tree and the customer VLAN identifier.

摘要翻译： 公开了使用最短路径桥接（“SPB”）在计算机网络中转发帧的方法，装置和产品。 该网络包括多个网桥，每个边缘网桥被分配一个唯一的服务虚拟局域网（“VLAN”）标识符。 其中一个桥接收到用于传输到目标节点的帧。 接收到的帧包括帧进入网络的入口网桥的服务VLAN标识符和客户VLAN标识符。 一个桥接器根据服务VLAN标识符标识SPB转发树。 SPB转发树指定网络中从入口网桥通过一个网桥到网络中的其他网桥的最短路由。 然后，一个桥将接收到的帧转发到出口网桥，而不依赖于SPB转发树和客户VLAN标识符的MAC-in-MAC封装。

公开(公告)号：US20140198794A1

公开(公告)日：2014-07-17

申请号：US14150640

申请日：2014-01-08

申请人： Apurva Mehta ,  Shivaprakash Shenoy ,  Ramanarayanan Ramakrishnan ,  Krishna Sankaran

发明人： Apurva Mehta ,  Shivaprakash Shenoy ,  Ramanarayanan Ramakrishnan ,  Krishna Sankaran

IPC分类号： H04L12/741

CPC分类号： H04L12/4633 ,  H04L29/06095 ,  H04L45/04 ,  H04L45/28 ,  H04L45/74

摘要： A method and apparatus for connecting multiple customer sites over a wide area network (WAN) using an overlay network is described. In one embodiment of the invention, each one of multiple customer edge (CE) routers establishes a Border Gateway Protocol (BGP) session with one or more BGP route reflectors and announces their private IP network prefixes and one or more transport IP addresses to reach that CE router. The BGP route reflector(s) reflect those IP network prefixes and the one or more transport IP addresses to reach that specific CE router to the other CE routers. The CE routers receive those reflected IP network prefixes and the corresponding transport IP address(es) to reach that CE router in which those IP network prefixes belong and register them in their corresponding routing/forwarding data structures. In this way, the CE routers learn how to reach each other.

摘要翻译： 描述了使用覆盖网络在广域网（WAN）上连接多个客户站点的方法和装置。 在本发明的一个实施例中，多个客户边缘（CE）路由器中的每一个路由器与一个或多个BGP路由反射器建立边界网关协议（BGP）会话，并且宣布其专用IP网络前缀和一个或多个传输IP地址以达到该 CE路由器 BGP路由反射器反映这些IP网络前缀和一个或多个传输IP地址，以到达其他CE路由器的特定CE路由器。 CE路由器接收到这些反映的IP网络前缀和相应的传输IP地址，以到达那些IP网络前缀所属的CE路由器，并将其注册到相应的路由/转发数据结构中。 以这种方式，CE路由器学习如何相互接触。

公开(公告)号：US08509248B2

公开(公告)日：2013-08-13

申请号：US12344644

申请日：2008-12-29

申请人： Apurva Mehta ,  Ramasamy Ramanathan ,  Kumar Mehta ,  Ramanarayanan Ramakrishnan

发明人： Apurva Mehta ,  Ramasamy Ramanathan ,  Kumar Mehta ,  Ramanarayanan Ramakrishnan

IPC分类号： H04L12/28 ,  H04J3/16

CPC分类号： H04L45/12 ,  H04L12/462 ,  H04L45/04 ,  H04L45/66

摘要： Methods, apparatus, and products for routing frames in a network using bridge identifiers, wherein the network includes a plurality of bridge nodes. At least one of the bridge nodes operates as an ingress bridge node through which frames are received into the network. At least one of the bridge nodes operates as an egress bridge node through which frames are transmitted out of the network. One of the bridge nodes receives, from the ingress bridge node, a frame for transmission to a destination node. The destination node connects to the network through the egress bridge node. The frame includes an ingress bridge identifier and an egress bridge identifier. The bridge that received the frame then routes the frame to the egress bridge node through which the destination node connects to the network in dependence upon the ingress bridge identifier and the egress bridge identifier included in the frame.

摘要翻译： 用于使用桥标识符在网络中路由帧的方法，装置和产品，其中所述网络包括多个网桥节点。 桥接节点中的至少一个作为进入网络的入口网桥节点运行。 至少一个桥接节点作为出口网桥节点运行，帧从网络中传出。 桥节点之一从入口网桥节点接收用于传输到目的地节点的帧。 目的节点通过出口网桥节点连接到网络。 帧包括入口网桥标识符和出口网桥标识符。 接收到帧的桥接器根据包含在帧中的入口网桥标识符和出口网桥标识符，将帧路由到目的节点通过其连接到网络的出口网桥节点。

公开(公告)号：US20110019678A1

公开(公告)日：2011-01-27

申请号：US12508949

申请日：2009-07-24

申请人： Apurva Mehta ,  Kumar Mehta ,  Ramasamy Ramanathan ,  Krishna Sankaran ,  Ramanarayanan Ramakrishnan ,  Shiva Shenoy ,  Gopi Krishna

发明人： Apurva Mehta ,  Kumar Mehta ,  Ramasamy Ramanathan ,  Krishna Sankaran ,  Ramanarayanan Ramakrishnan ,  Shiva Shenoy ,  Gopi Krishna

IPC分类号： H04L12/56

CPC分类号： H04L45/24 ,  H04L12/4625 ,  H04L45/04 ,  H04L45/245 ,  H04L45/66 ,  H04L49/351 ,  Y02D50/30

摘要： Methods, apparatus, and products for routing frames in a shortest path computer network for a multi-homed legacy bridge, wherein the network includes a plurality of bridges. At least two of the plurality of bridges operate as edge bridges through which the frames ingress and egress the network. A first edge bridge identifies a legacy bridge nickname for a legacy bridge connected to the network through the first edge bridge and a second edge bridge using active-active link aggregation. The first bridge receives a frame from the legacy bridge and determines, in dependence upon the frame's destination node address, an egress bridge nickname for a third bridge through which a destination node connects to the network. The first bridge then adds the legacy bridge nickname and the egress bridge nickname to the frame and routes the frame to the third bridge in dependence upon the egress bridge nickname.

摘要翻译： 用于在用于多宿主遗留桥的最短路径计算机网络中路由帧的方法，装置和产品，其中所述网络包括多个桥。 所述多个网桥中的至少两个桥作为边缘网桥，所述帧通过所述边缘网桥进入和离开所述网络。 第一个边缘网桥为通过第一个边缘网桥连接到网络的传统网桥和使用主动 - 主动链路聚合的第二个边缘网桥标识传统网桥昵称。 第一桥接器从传统桥接收帧，并根据帧的目的地节点地址确定目的节点通过其连接到网络的第三桥的出口网桥昵称。 然后，第一个桥接器将遗留桥昵称和出口桥昵称添加到帧中，并根据出口网桥昵称将帧路由到第三桥。

公开(公告)号：US08125928B2

公开(公告)日：2012-02-28

申请号：US12508949

申请日：2009-07-24

申请人： Apurva Mehta ,  Kumar Mehta ,  Ramasamy Ramanathan ,  Krishna Sankaran ,  Ramanarayanan Ramakrishnan ,  Shiva Shenoy ,  Gopi Krishna

发明人： Apurva Mehta ,  Kumar Mehta ,  Ramasamy Ramanathan ,  Krishna Sankaran ,  Ramanarayanan Ramakrishnan ,  Shiva Shenoy ,  Gopi Krishna

IPC分类号： H04L12/28

CPC分类号： H04L45/24 ,  H04L12/4625 ,  H04L45/04 ,  H04L45/245 ,  H04L45/66 ,  H04L49/351 ,  Y02D50/30

摘要： Methods, apparatus, and products for routing frames in a shortest path computer network for a multi-homed legacy bridge, wherein the network includes a plurality of bridges. At least two of the plurality of bridges operate as edge bridges through which the frames ingress and egress the network. A first edge bridge identifies a legacy bridge nickname for a legacy bridge connected to the network through the first edge bridge and a second edge bridge using active-active link aggregation. The first bridge receives a frame from the legacy bridge and determines, in dependence upon the frame's destination node address, an egress bridge nickname for a third bridge through which a destination node connects to the network. The first bridge then adds the legacy bridge nickname and the egress bridge nickname to the frame and routes the frame to the third bridge in dependence upon the egress bridge nickname.

摘要翻译： 用于在用于多宿主遗留桥的最短路径计算机网络中路由帧的方法，装置和产品，其中所述网络包括多个桥。 所述多个网桥中的至少两个桥作为边缘网桥，所述帧通过所述边缘网桥进入和离开所述网络。 第一个边缘网桥为通过第一个边缘网桥连接到网络的传统网桥和使用主动 - 主动链路聚合的第二个边缘网桥标识传统网桥昵称。 第一桥接器从传统桥接收帧，并根据帧的目的地节点地址确定目的节点通过其连接到网络的第三桥的出口网桥昵称。 然后，第一个桥接器将遗留桥昵称和出口桥昵称添加到帧中，并根据出口网桥昵称将帧路由到第三桥。

公开(公告)号：US20100165995A1

公开(公告)日：2010-07-01

申请号：US12344644

申请日：2008-12-29

申请人： Apurva Mehta ,  Ramasamy Ramanathan ,  Kumar Mehta ,  Ramanarayanan Ramakrishnan

发明人： Apurva Mehta ,  Ramasamy Ramanathan ,  Kumar Mehta ,  Ramanarayanan Ramakrishnan

IPC分类号： H04L12/28

CPC分类号： H04L45/12 ,  H04L12/462 ,  H04L45/04 ,  H04L45/66

摘要： Methods, apparatus, and products for routing frames in a network using bridge identifiers, wherein the network includes a plurality of bridge nodes. At least one of the bridge nodes operates as an ingress bridge node through which frames are received into the network. At least one of the bridge nodes operates as an egress bridge node through which frames are transmitted out of the network. One of the bridge nodes receives, from the ingress bridge node, a frame for transmission to a destination node. The destination node connects to the network through the egress bridge node. The frame includes an ingress bridge identifier and an egress bridge identifier. The bridge that received the frame then routes the frame to the egress bridge node through which the destination node connects to the network in dependence upon the ingress bridge identifier and the egress bridge identifier included in the frame.

摘要翻译： 用于使用桥标识符在网络中路由帧的方法，装置和产品，其中所述网络包括多个网桥节点。 桥接节点中的至少一个作为进入网络的入口网桥节点运行。 至少一个桥接节点作为出口网桥节点运行，帧从网络中传出。 桥节点之一从入口网桥节点接收用于传输到目的地节点的帧。 目的节点通过出口网桥节点连接到网络。 帧包括入口网桥标识符和出口网桥标识符。 接收到帧的桥接器根据包含在帧中的入口网桥标识符和出口网桥标识符，将帧路由到目的节点通过其连接到网络的出口网桥节点。

公开(公告)号：US08514746B1

公开(公告)日：2013-08-20

申请号：US12941692

申请日：2010-11-08

申请人： Sri Goli ,  Ramanarayanan Ramakrishnan ,  Deepak Ojha ,  Apurva Mehta

发明人： Sri Goli ,  Ramanarayanan Ramakrishnan ,  Deepak Ojha ,  Apurva Mehta

IPC分类号： H04L12/28

CPC分类号： H04L12/462 ,  H04L41/0672 ,  H04L45/28 ,  H04L45/48

摘要： The reliability of the connection of a client edge (CE) device to a core network may be improved using redundant provider edge (PE) devices. A first of the PE devices may monitor a connection to the core network, where the PE device acts as a root device in a set of devices that implement a spanning tree using a spanning tree protocol and where a second PE device in the set of devices additionally connects to the core network. The PE device may additionally detect failure of the connection of the PE device to the core network; and change, in response to the detected failure of the connection, a spanning tree protocol priority value of the device to a value having a lower priority than that of the second PE device.

摘要翻译： 可以使用冗余提供商边缘（PE）设备来改进客户端（CE）设备到核心网络的连接的可靠性。 第一个PE设备可以监视与核心网络的连接，其中PE设备充当使用生成树协议实现生成树的一组设备中的根设备，并且其中设备组中的第二PE设备 另外连接到核心网络。 PE设备还可以检测PE设备到核心网的连接失败; 并且响应于检测到的连接失败，将所述设备的生成树协议优先级值改变为具有比所述第二PE设备优先级低的优先级值。

公开(公告)号：US07876710B2

公开(公告)日：2011-01-25

申请号：US12182273

申请日：2008-07-30

申请人： Sunesh Rustagi ,  Apurva Mehta ,  Ramanarayanan Ramakrishnan ,  Rajagopalan Subbiah

发明人： Sunesh Rustagi ,  Apurva Mehta ,  Ramanarayanan Ramakrishnan ,  Rajagopalan Subbiah

IPC分类号： H04L12/28

CPC分类号： H04L12/4625 ,  H04L45/22 ,  H04L45/28 ,  H04L45/48 ,  H04L45/66

摘要： A method may include receiving a packet including a destination address, identifying a destination address entry based on the destination address, the destination address entry including an address identifier, comparing the address identifier to an event identifier, determining whether an event occurred based on the comparison, and forwarding the packet on an alternate path if it is determined that the event occurred.

摘要翻译： 方法可以包括接收包含目的地地址的分组，基于目的地地址识别目的地地址条目，目的地地址条目包括地址标识符，将地址标识符与事件标识符进行比较，基于比较确定事件是否发生 并且如果确定事件发生，则将数据包转发到备用路径上。