公开(公告)号：US07643409B2

公开(公告)日：2010-01-05

申请号：US10925743

申请日：2004-08-25

申请人： Eric Voit ,  Steve Phillips ,  Ali Sajassi ,  Yves Hertoghs

发明人： Eric Voit ,  Steve Phillips ,  Ali Sajassi ,  Yves Hertoghs

IPC分类号： G01R31/08 ,  G06F15/173

CPC分类号： H04L45/48

摘要： A computer network includes a core network connected with first and second Ethernet access domain networks, each of Ethernet access domain networks including a user-facing provider edge (u-PE) device, a primary network-facing provider edge (n-PE) device, a redundant n-PE device, and a plurality of aggregation provider edge (Agg-PE) devices providing connectivity between to the u-PE device and the primary and redundant n-PE devices, the Agg-PE devices running a spanning-tree protocol (STP) algorithm. A primary data path is provided along with first and second redundant data paths that include first and second redundant pseudowires (PWs), respectively, connected across the core network, the first and second redundant data paths being blocked by the STP algorithm when the primary data path is available, the STP algorithm unblocking either the first or second redundant data path in response to a failure of the primary data path. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

摘要翻译： 计算机网络包括与第一和第二以太网接入域网络连接的核心网络，每个以太网接入域网络包括面向用户的提供商边缘（u-PE）设备，主要面向网络的提供商边缘（n-PE）设备 ，冗余n-PE设备，以及提供与u-PE设备和主冗余n-PE设备之间的连通性的多个聚合提供商边缘（Agg-PE）设备，运行生成树的Agg-PE设备 协议（STP）算法。 主数据路径与第一和第二冗余数据路径一起提供，第一和第二冗余数据路径分别包括连接在核心网络上的第一和第二冗余伪线（PW），第一和第二冗余数据路径被主要数据 路径可用，STP算法响应于主数据路径的故障解除阻塞第一或第二冗余数据路径。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

公开(公告)号：US20090268731A1

公开(公告)日：2009-10-29

申请号：US12148816

申请日：2008-04-23

申请人： Ashok Narayanan ,  Robert Goguen ,  Ali Sajassi ,  Samir Vapiwala

发明人： Ashok Narayanan ,  Robert Goguen ,  Ali Sajassi ,  Samir Vapiwala

IPC分类号： H04L12/56

CPC分类号： H04L12/18 ,  H04L45/00 ,  H04L45/16 ,  H04L45/50

摘要： A method and apparatus for establishing multicast and unicast forwarding are disclosed. In one embodiment, a method includes transmitting path messages to a plurality of receivers, receiving a plurality of messages in response to the path messages and establishing unicast and multicast forwarding based on received unicast and multicast labels. Each of the receivers is associated with a sub-LSP (Label Switched Path) in a Point-to-Multipoint (P2MP) LSP and the response messages include a multicast label and at least one unicast label corresponding to a unicast path to one of the receivers.

摘要翻译： 公开了一种建立组播和单播转发的方法和装置。 在一个实施例中，一种方法包括向多个接收机发送路径消息，响应于路径消息接收多条消息，并基于接收的单播和多播标签建立单播和多播转发。 每个接收机与点对多点（P2MP）LSP中的子LSP（标签交换路径）相关联，并且响应消息包括多播标签和对应于单播路径中的一个的至少一个单播标签 接收器。

公开(公告)号：US20090122732A1

公开(公告)日：2009-05-14

申请号：US11983678

申请日：2007-11-08

申请人： Frank Brockners ,  Ali Sajassi ,  Robert James Goguen ,  Ijsbrand Wijnands

发明人： Frank Brockners ,  Ali Sajassi ,  Robert James Goguen ,  Ijsbrand Wijnands

IPC分类号： H04L5/16 ,  H04L12/56

CPC分类号： H04L45/00 ,  H04L45/16 ,  H04L45/48 ,  H04L45/50 ,  H04L45/507

摘要： In one embodiment, a method includes sending upstream to a nearest neighbor node, by a Client Label Switched Router (LSR), a downstream label map message of a Server-Forwarding Equivalence Class type (S-FEC-DOWN). In response to the S-FEC-DOWN, a downstream forwarding state from the nearest neighbor node to the Client LSR is established. An upstream label map message of a Client-Forwarding Equivalence Class type (C-FEC UP) is received from the nearest neighbor node. An upstream forwarding state corresponding to the C-FEC UP is then established by the Client LSR.

摘要翻译： 在一个实施例中，一种方法包括由客户端标签交换路由器（LSR）向服务器转发等价类型（S-FEC-DOWN）的下游标签映射消息向上游发送最近邻居节点。 响应S-FEC-DOWN，建立从最近邻节点到客户端LSR的下游转发状态。 从最近邻节点接收到客户转发等价类型（C-FEC UP）的上游标签映射消息。 然后由客户端LSR建立与C-FEC UP对应的上行转发状态。

公开(公告)号：US07515542B2

公开(公告)日：2009-04-07

申请号：US11180003

申请日：2005-07-12

申请人： Yves Hertoghs ,  Ali Sajassi ,  Norman W. Finn ,  Wojciech Dec

发明人： Yves Hertoghs ,  Ali Sajassi ,  Norman W. Finn ,  Wojciech Dec

IPC分类号： H04J1/16

CPC分类号： H04L12/4633

摘要： A broadband access node includes a port for connection with a Digital Subscriber Line and a processor to run code that implements a virtual maintenance end point (vMEP). The vMEP translates an IEEE 802.1ag Loopback Message (LBM) received from a device on an Ethernet access network into a legacy operations and maintenance (OAM) message that is transmitted to a residential gateway (RG) device. The legacy OAM message determines a link-level connectivity status between broadband access node and the RG device. The vMEP also transmits a reply message back to the device on an Ethernet access network in compliance with the IEEE 802.1ag specification. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

摘要翻译： 宽带接入节点包括用于与数字用户线路连接的端口和用于运行实现虚拟维护终点（vMEP）的代码的处理器。 vMEP将从以太网接入网络上的设备接收的IEEE 802.1ag环回消息（LBM）转换为传输到住宅网关（RG）设备的传统操作和维护（OAM）消息。 传统的OAM消息确定宽带接入节点和RG设备之间的链路级连接状态。 vMEP还根据IEEE 802.1ag规范在以太网接入网络上将回复消息发送回设备。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

公开(公告)号：US20070025256A1

公开(公告)日：2007-02-01

申请号：US11180003

申请日：2005-07-12

申请人： Yves Hertoghs ,  Ali Sajassi ,  Norman Finn ,  Wojciech Dec

发明人： Yves Hertoghs ,  Ali Sajassi ,  Norman Finn ,  Wojciech Dec

IPC分类号： H04L12/26

CPC分类号： H04L12/4633

摘要： A broadband access node includes a port for connection with a Digital Subscriber Line and a processor to run code that implements a virtual maintenance end point (vMEP). The vMEP translates an IEEE 802.1ag Loopback Message (LBM) received from a device on an Ethernet access network into a legacy operations and maintenance (OAM) message that is transmitted to a residential gateway (RG) device. The legacy OAM message determines a link-level connectivity status between broadband access node and the RG device. The vMEP also transmits a reply message back to the device on an Ethernet access network in compliance with the IEEE 802.1ag specification. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

摘要翻译： 宽带接入节点包括用于与数字用户线路连接的端口和用于运行实现虚拟维护终点（vMEP）的代码的处理器。 vMEP将从以太网接入网络上的设备接收的IEEE 802.1ag环回消息（LBM）转换为传输到住宅网关（RG）设备的传统操作和维护（OAM）消息。 传统的OAM消息确定宽带接入节点和RG设备之间的链路级连接状态。 vMEP还根据IEEE 802.1ag规范在以太网接入网络上发送回应消息给设备。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

公开(公告)号：US20060245435A1

公开(公告)日：2006-11-02

申请号：US11117249

申请日：2005-04-28

申请人： Ali Sajassi

发明人： Ali Sajassi

IPC分类号： H04L12/28

CPC分类号： H04M11/062 ,  H04L12/2881 ,  H04L12/4662 ,  H04L29/12839 ,  H04L61/6022

摘要： A system and method for identifying and forwarding traffic to/from Digital Subscriber Line Access Multiplexer (DSLAM) devices and feature servers without ambiguity includes a user-facing provider edge (u-PE) device that receives a customer frame from a DSLAM device, the customer frame being of a first format that includes a first Virtual Local Area Network (VLAN) tag of a first bit length. The first VLAN tag identifies a Digital Subscriber Line (DSL) subscriber. The customer frame is re-formatted by the u-PE device such that the first VLAN tag is mapped to a second VLAN tag of a second bit length greater than the first bit length, the second VLAN tag identifying a service instance of the Ethernet access network. The u-PE device encapsulating the customer frame inside a provider frame, with a provider source Media Access Control (MAC) address represents a MAC address associated with the DSLAM, and a provider destination MAC address represents a MAC address of a destination device. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

摘要翻译： 用于识别和转发来自数字用户线路接入复用器（DSLAM）设备和特征服务器的流量的系统和方法，不含歧义，包括从DSLAM设备接收客户帧的面向用户的提供商边缘（u-PE）设备， 客户帧是包括第一位长度的第一虚拟局域网（VLAN）标签的第一格式。 第一个VLAN标签标识数字用户线路（DSL）用户。 客户帧由u-PE设备重新格式化，使得第一VLAN标签被映射到大于第一位长度的第二位长度的第二VLAN标签，第二VLAN标签标识以太网接入的服务实例 网络。 用提供商源媒体访问控制（MAC）地址表示与DSLAM相关联的MAC地址，并且提供者目的地MAC地址表示目的地设备的MAC地址，将客户帧封装在提供商帧内的u-PE设备。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

公开(公告)号：US5953676A

公开(公告)日：1999-09-14

申请号：US918470

申请日：1997-08-26

申请人： Kirk Berry ,  Louis King ,  Ali Sajassi

发明人： Kirk Berry ,  Louis King ,  Ali Sajassi

IPC分类号： H04W84/14 ,  H04Q7/20

CPC分类号： H04W84/14

摘要： An improved fixed wired system and method of originating a call in a fixed wired system in which a remote station (10), which is wired to a communication terminal (15), such as a standard telephone, detects an off-hook state of the communication terminal (15), transmits a call origination request signal to a base station (20,25) via a radio link in response to the off-hook state detection, and delivers a dial tone to the communication terminal (15) upon receiving an acknowledgment from the base station (20,25). After a dial tone is delivered to the communication terminal (15) and the user begins dialing a directory number, the remote station (10) collects the dialed digits and forwards the dialed digits separately or in groups, to the base station (20,25) where the digits are analyzed to determine whether a complete directory number has been dialed. When the base station (20,25) detects that a complete directory number has been dialed, it forwards the dialed digits to a communication network (40), such as a public switched telephone network or an integrated services digital network for further processing.

摘要翻译： 一种在固定有线系统中发起呼叫的改进的固定有线系统和方法，其中连接到诸如标准电话的通信终端（15）的远程站（10）检测到所述呼叫的摘机状态 通信终端（15）响应于摘机状态检测经由无线电链路向基站（20,25）发送呼叫发起请求信号，并且在接收到通知终端（15）时向通信终端（15）发送拨号音 来自基站的确认（20,25）。 拨号音被传送到通信终端（15）并且用户开始拨打电话号码后，远程站（10）收集拨号数字，并将拨号数字分组或分组转发给基站（20,25 ）其中数字被分析以确定是否已经拨打完整的目录号码。 当基站（20,25）检测到已经拨出完整的目录号码时，它将拨出的数字转发到诸如公共交换电话网络或综合业务数字网络的通信网络（40）以进一步处理。

公开(公告)号：US09548959B2

公开(公告)日：2017-01-17

申请号：US13428436

申请日：2012-03-23

申请人： Sami Boutros ,  Samer Salam ,  Ali Sajassi ,  Clarence Filsfils

发明人： Sami Boutros ,  Samer Salam ,  Ali Sajassi ,  Clarence Filsfils

IPC分类号： G06F15/173 ,  H04L29/12

CPC分类号： H04L61/103 ,  H04L61/6009

摘要： An example method is provided that includes determining whether an address resolution protocol reply from a local machine has been received at an edge node; updating a local cache based on the reply from the local machine; and sending the reply to a plurality of edge nodes through a data plane of a data center interconnect. In more specific implementations, the method can include determining whether an address resolution protocol request has been received from the local machine. The method could also include updating a local machine cache based on the request. In certain implementations, the method can include determining whether the request is targeting the local machine; and dropping the request if the request is targeting the local machine. The method could also include sending the request through the data center interconnect if the request is not targeting the local machine.

摘要翻译： 提供了一种示例性方法，其包括确定在边缘节点处是否已经接收到来自本地机器的地址解析协议应答; 根据本地机器的回复更新本地缓存; 并通过数据中心互连的数据平面将答复发送到多个边缘节点。 在更具体的实现中，该方法可以包括确定是否已经从本地机器接收到地址解析协议请求。 该方法还可以包括基于该请求更新本地机器缓存。 在某些实现中，该方法可以包括确定请求是否针对本地机器; 如果请求针对本地机器，则删除该请求。 该方法还可以包括如果请求不针对本地机器，则通过数据中心互连发送请求。

公开(公告)号：US20160021015A1

公开(公告)日：2016-01-21

申请号：US14335622

申请日：2014-07-18

申请人： Samir D. Thoria ,  Keyur Patel ,  Ali Sajassi

发明人： Samir D. Thoria ,  Keyur Patel ,  Ali Sajassi

IPC分类号： H04L12/851 ,  H04L12/46

CPC分类号： H04L47/2483 ,  H04L12/4633 ,  H04L45/32 ,  H04L45/50

摘要： In one embodiment, a method includes obtaining, at a first provider edge (PE) included a plurality of PEs multi-homed to a first customer edge (CE), traffic intended for the first CE, wherein the traffic includes a first indication, the first indication being configured to identify the traffic as flood traffic. A forwarding PE included in the plurality of PEs suitable to use to forward the traffic to the first CE is identified based on identifying traffic as the flood traffic. The method also includes determining whether the first PE is the forwarding PE, and providing the traffic to the first CE using the first PE when it is determined that the first PE is the forwarding PE. When it is determined that the first PE is not the forwarding PE, the traffic is filtered using the first PE.

摘要翻译： 在一个实施例中，一种方法包括在包括多归属于第一客户边缘（CE）的多个PE的第一提供者边缘（PE）处获得旨在用于第一CE的流量，其中流量包括第一指示， 第一指示被配置为将流量识别为洪泛流量。 基于将流量识别为洪泛流量，识别适合于将流量转发到第一CE的多个PE中包括的转发PE。 该方法还包括确定第一PE是否是转发PE，并且当确定第一PE是转发PE时，使用第一PE将流量提供给第一CE。 当确定第一PE不是转发PE时，使用第一PE过滤流量。

公开(公告)号：US09088517B2

公开(公告)日：2015-07-21

申请号：US13369142

申请日：2012-02-08

申请人： Ali Sajassi ,  Samer Salam ,  Sami Boutros

发明人： Ali Sajassi ,  Samer Salam ,  Sami Boutros

IPC分类号： H04L12/753 ,  H04L12/723

CPC分类号： H04L12/4679 ,  H04L12/1863 ,  H04L45/02 ,  H04L45/48 ,  H04L45/50 ,  H04L61/2069

摘要： Techniques for stitching multicast trees in a multiple data center environment. According to one embodiment, a technique for stitching multicast trees is provided, which includes determining, at an edge device of a data center, one or more Virtual Local Area Networks (VLANs) assigned to the edge device as a result of a designated forwarder election. An assigned forwarder message is sent by the edge device to one or more devices on the data center, the assigned forwarder message advertising the edge device as a designated forwarder for the VLANs assigned to the edge device. For each of the VLANs assigned to the edge device, the assigned forwarder message causes the edge device to be included in a multicast tree for the VLAN when the assigned forwarder message is received by specific ones of the devices in the data center that are associated with the VLAN.

摘要翻译： 在多数据中心环境中拼接多播树的技术。 根据一个实施例，提供了一种用于拼接多播树的技术，其包括在数据中心的边缘设备处确定由于指定的转发器选举而分配给边缘设备的一个或多个虚拟局域网（VLAN） 。 分配的转发器消息由边缘设备发送到数据中心上的一个或多个设备，所分配的转发器消息将边缘设备通告为分配给边缘设备的VLAN的指定转发器。 对于分配给边缘设备的每个VLAN，分配的转发器消息使得边缘设备被包含在VLAN的多播树中，当分配的转发器消息被数据中心中与数据中心相关联的特定设备接收时 VLAN。