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1. 发明授权

US08199753B2 Forwarding frames in a computer network using shortest path bridging 有权
标题翻译：使用最短路径桥接在计算机网络中转发帧
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。

2. 发明申请

US20100309912A1 FORWARDING FRAMES IN A COMPUTER NETWORK USING SHORTEST PATH BRIDGING 有权
标题翻译：使用最短路径桥接在计算机网络中的前向框架
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。

3. 发明授权

US07876710B2 Layer two MAC flushing/re-routing 有权
标题翻译：二层MAC冲洗/重路由
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。

4. 发明申请

US20100027543A1 LAYER TWO MAC FLUSHING/RE-ROUTING 有权
标题翻译：层两次MAC冲洗/重新路由
公开(公告)号：US20100027543A1
公开(公告)日：2010-02-04
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： H04L12/56
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。

5. 发明授权

US07925744B1 Determining MAC state using sequence numbers in a distributed environment 有权
标题翻译：使用分布式环境中的序列号确定MAC状态
公开(公告)号：US07925744B1
公开(公告)日：2011-04-12
申请号：US12188769
申请日：2008-08-08
申请人： Sanjiv Doshi , Rajagopalan Subbiah , Apurva Mehta , Kumar Mehta
发明人： Sanjiv Doshi , Rajagopalan Subbiah , Apurva Mehta , Kumar Mehta
IPC分类号： G06F15/173 , H04L12/28 , G06F11/00
CPC分类号： H04L49/3009
摘要： A derived state value is calculated based on a plurality of component state values. As any of the plurality of component state values changes, the derived state value is recalculated. When sending information about a MAC address or other data between two components, the derived state value is included in the information sent. An object receiving a MAC address or other data from another object checks the validity of the received derived state value to determine whether to accept the new data and flush old data, to accept the new data, or to ignore the new data.
摘要翻译：基于多个分量状态值计算导出状态值。随着多个分量状态值中的任何一个变化，重新计算导出的状态值。当在两个组件之间发送有关MAC地址或其他数据的信息时，派生状态值包含在发送的信息中。从另一个对象接收MAC地址或其他数据的对象检查接收的导出状态值的有效性，以确定是接受新数据还是刷新旧数据，接受新数据或忽略新数据。

6. 发明授权

US07548541B2 Managing VLAN traffic in a multiport network node using customer-specific identifiers 有权
标题翻译：使用客户特定的标识符管理多端口网络节点中的VLAN流量
公开(公告)号：US07548541B2
公开(公告)日：2009-06-16
申请号：US10439684
申请日：2003-05-16
申请人： Prashanth Ishwar , Ajay Gaonkar , Apurva Mehta , Rajagopalan Subbiah
发明人： Prashanth Ishwar , Ajay Gaonkar , Apurva Mehta , Rajagopalan Subbiah
IPC分类号： H04L12/28
CPC分类号： H04L41/00 , H04L12/467 , H04L45/50
摘要： A technique for managing traffic in a multiport network node involves establishing customer-specific VLANs within the multiport network node that are identified by a combination of a VLAN ID and a customer ID. Traffic received at the multiport network node is mapped to a customer-specific VLAN and then broadcast to ports that are included in the customer-specific VLAN. Because customer-specific VLANs are identified by a combination of a VLAN ID and customer ID, a service provider can establish and maintain private broadcast domains on a per-customer ID basis. This enables the service provider to expand the number of unique VLAN IDs within the Service Provider Edge Device beyond the 4,096 limitation set by the IEEE 802.1Q standard while maintaining interoperability with the IEEE 802.1Q standard for incoming and outgoing traffic.
摘要翻译：用于管理多端口网络节点中的流量的技术涉及在多端口网络节点内建立由VLAN ID和客户ID的组合标识的客户特定VLAN。在多端口网络节点处接收的流量映射到客户特定的VLAN，然后广播到客户特定VLAN中包含的端口。由于客户特定的VLAN由VLAN ID和客户ID的组合来标识，服务提供商可以根据每个客户ID建立和维护私有广播域。这使服务提供商能够扩展服务提供商边缘设备内的唯一VLAN ID数，超出IEEE 802.1Q标准设置的4,096限制，同时保持与IEEE 802.1Q标准的传入和传出流量的互操作性。

7. 发明授权

US08806063B1 Enhanced pulse assisted time synchronization protocol 有权
标题翻译：增强脉冲辅助时间同步协议
公开(公告)号：US08806063B1
公开(公告)日：2014-08-12
申请号：US13180286
申请日：2011-07-11
申请人： Prakash Kamath , Apurva Mehta , Kamatchi Gopalakrishnan , Rajagopalan Subbiah , Rohit Puri , Vikram Bobade
发明人： Prakash Kamath , Apurva Mehta , Kamatchi Gopalakrishnan , Rajagopalan Subbiah , Rohit Puri , Vikram Bobade
IPC分类号： G06F1/12 , G06F15/16 , H04J3/06
CPC分类号： G06F1/14 , G06F1/12 , H04J3/0667
摘要： A network device may include a timing module and at least one interface. The timing module determines a local time of the network device indicating when the network device sends a synchronization start message. The at least one interface sends the synchronization start message to a time client device to set the current time of day on the time client device, receives a synchronization response message from the time client device indicating that the current time of day of the time client device was set, and sends a synchronization success message to the time client device indicating that the time client device has correctly set its current time of day.
摘要翻译：网络设备可以包括定时模块和至少一个接口。定时模块确定网络设备的本地时间，指示网络设备何时发送同步开始消息。所述至少一个接口将同步开始消息发送到时间客户端设备，以在客户端设备的时间设置当前时间，从时间客户端设备接收指示当前时间的客户端设备的同步响应消息并且向客户端设备发送指示时间客户端设备正确地设置其当前时间的同步成功消息。

8. 发明授权

US07519056B2 Managing traffic in a multiport network node using logical ports 有权
标题翻译：使用逻辑端口管理多端口网络节点中的流量
公开(公告)号：US07519056B2
公开(公告)日：2009-04-14
申请号：US10455510
申请日：2003-06-04
申请人： Prashanth Ishwar , Ajay Gaonkar , Apurva Mehta , Rajagopalan Subbiah
发明人： Prashanth Ishwar , Ajay Gaonkar , Apurva Mehta , Rajagopalan Subbiah
IPC分类号： H04L12/28 , G06F15/16
CPC分类号： H04L41/00 , H04L12/467 , H04L45/50
摘要： A technique for implementing VLANs across a service provider network involves establishing logical ports that have bindings to transport tunnels. The logical ports are then treated the same as physical ports in defining broadcast domains at particular service provider edge devices. Logical ports can be established for Layer 2 transport tunnels that use stacked VLAN tunneling and MPLS tunneling. Establishing a logical port that uses stacked VLAN tunneling involves binding a physical port and a stacked VLAN tunnel to the logical port. Establishing a logical port that uses MPLS tunneling involves binding an MPLS tunnel to a logical port. In one embodiment, the logical port is bound to a static MPLS tunnel and in another embodiment, the logical port is bound to a dynamic MPLS tunnel and the destination IP address of the destination service provider edge device.
摘要翻译：跨服务提供商网络实现VLAN的技术涉及建立具有绑定到传输隧道的逻辑端口。然后在特定服务提供商边缘设备定义广播域时，将逻辑端口与物理端口相同。可以为使用堆叠VLAN隧道和MPLS隧道的二层传输隧道建立逻辑端口。建立使用堆叠VLAN隧道的逻辑端口涉及将物理端口和堆叠VLAN隧道绑定到逻辑端口。建立使用MPLS隧道的逻辑端口涉及将MPLS隧道绑定到逻辑端口。在一个实施例中，逻辑端口被绑定到静态MPLS隧道，在另一个实施例中，逻辑端口绑定到动态MPLS隧道和目的地服务提供商边缘设备的目的地IP地址。

9. 发明授权

US08688552B1 Performing separate accounting and billing for each customer of a shared customer device 有权
标题翻译：为共享客户设备的每个客户执行单独的会计和计费
公开(公告)号：US08688552B1
公开(公告)日：2014-04-01
申请号：US13161982
申请日：2011-06-16
申请人： Debi Prasad Sahoo , Chakradhar Kar , Moojin Jeong , Rajagopalan Subbiah , Prakash Kamath
发明人： Debi Prasad Sahoo , Chakradhar Kar , Moojin Jeong , Rajagopalan Subbiah , Prakash Kamath
IPC分类号： G07F19/00 , G06F15/173 , H04M11/00 , G06Q30/04 , H04L12/24 , H04W4/24
CPC分类号： G06Q30/04 , H04L12/1457 , H04L12/4633 , H04L12/4654 , H04L12/4662 , H04L41/0213 , H04L43/0876 , H04M15/765 , H04M15/7652 , H04M2215/32 , H04W4/24
摘要： Techniques are described that facilitate performing accounting and billing separately for each customer of a service provider account registered to an owner of a shared customer device. An access router performs separate data usage accounting for each of the customers in sub-accounts of the registered service provider account based on customer virtual local area network (CVLAN) and service VLAN (SVLAN) tags included in data packets. A network operator may, therefore, generate a bill for the shared customer device that includes separate data usage charges for each customer. To facilitate the techniques, the access router may determine a CVLAN and SVLAN associated with a customer. The CVLAN and SVLAN tags are included in a service request toward a service provider, and copied into a service request reply toward the shared customer device. The shared customer device then includes the tags in data packets to identify the customer to the access router.
摘要翻译：描述了便于对注册到共享客户设备的所有者的服务提供商帐户的每个客户单独执行记帐和计费的技术。访问路由器根据数据包中包含的客户虚拟局域网（CVLAN）和服务VLAN（SVLAN）标签，对注册服务提供商帐户的子帐户中的每个客户进行单独的数据使用计费。因此，网络运营商可以为共享客户设备生成包括针对每个客户的单独的数据使用费用的账单。为了方便这些技术，接入路由器可以确定与客户相关联的CVLAN和SVLAN。 CVLAN和SVLAN标签包含在向服务提供商提供的服务请求中，并复制到向共享客户设备发送的服务请求中。然后，共享的客户设备在数据分组中包括标签以将该客户识别到接入路由器。

10. 发明申请

US20110271009A1 INTERFACE GROUPING FOR MEDIA ACCESS CONTROL ADDRESS PINNING IN A LAYER TWO NETWORK 有权
标题翻译：用于媒体访问控制地址接口的界面分组在一个两层网络中
公开(公告)号：US20110271009A1
公开(公告)日：2011-11-03
申请号：US12840072
申请日：2010-07-20
申请人： Sanjiv Doshi , Jagadish Grandhi , Rajagopalan Subbiah
发明人： Sanjiv Doshi , Jagadish Grandhi , Rajagopalan Subbiah
IPC分类号： G06F15/16
CPC分类号： H04L45/00 , H04L45/02 , H04L45/50 , H04L45/66 , H04L49/3009 , H04L49/351 , H04L63/1466
摘要： An example network device includes a set of interfaces, a control unit, and a forwarding engine. The control unit includes an interface group information repository that stores data defining interface groups. Each interface group includes one or more interfaces. The forwarding engine includes a media access control (MAC) address repository that stores a mapping of a first interface to a source MAC address, and a MAC address management module that determines whether an interface group to which the first interface is assigned is the same interface group as the interface group to which a second interface is assigned. The control unit is configured to receive a layer two (L2) communication via the second interface, wherein the L2 communication includes the source MAC address. The forwarding engine dynamically updates the MAC address repository based on the determination of the MAC address management module.
摘要翻译：示例性网络设备包括一组接口，控制单元和转发引擎。控制单元包括存储定义接口组的数据的接口组信息存储库。每个接口组包括一个或多个接口。转发引擎包括存储第一接口到源MAC地址的映射的媒体访问控制（MAC）地址存储库，以及确定分配了第一接口的接口组是否是相同接口的MAC地址管理模块组作为分配了第二个接口的接口组。控制单元被配置为经由第二接口接收第二层（L2）通信，其中L2通信包括源MAC地址。转发引擎根据MAC地址管理模块的确定动态更新MAC地址库。

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