公开(公告)号：US20060245438A1

公开(公告)日：2006-11-02

申请号：US11117016

申请日：2005-04-28

申请人： Ali Sajassi ,  Norman Finn

发明人： Ali Sajassi ,  Norman Finn

IPC分类号： H04L12/56

CPC分类号： H04L69/22 ,  H04L12/18 ,  H04L12/2852 ,  H04L12/4645 ,  H04L12/465 ,  H04L12/4662 ,  H04L12/4691 ,  H04L45/16 ,  H04L49/351

摘要： A method of operation for a provider edge device of a core network includes receiving a customer frame from an access network; the customer frame having a first Virtual Local Area Network (VLAN) tag of a first predetermined bit length. The first VLAN tag including a service instance identifier. The service instance identifier of the first VLAN tag is then mapped into a second VLAN tag of a second predetermined bit length greater than the first predetermined bit length. 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： 核心网络的提供商边缘设备的操作方法包括从接入网络接收客户帧; 所述客户帧具有第一预定位长度的第一虚拟局域网（VLAN）标签。 第一个VLAN标签包含服务实例标识符。 然后将第一VLAN标签的服务实例标识符映射到大于第一预定位长度的第二预定位长度的第二VLAN标签。 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：US09350665B2

公开(公告)日：2016-05-24

申请号：US13601957

申请日：2012-08-31

申请人： Derek Man-Kit Yeung ,  Ali Sajassi ,  Hong Zhang

发明人： Derek Man-Kit Yeung ,  Ali Sajassi ,  Hong Zhang

IPC分类号： H04J1/16 ,  H04L12/803

CPC分类号： H04L47/125

摘要： In one embodiment, a method is provided for congestion mitigation. In this method, a congestion level of data flows along a path is monitored relative to a threshold. Here, each data flow is associated with a flow identifier. Based on detection that the congestion level exceeds the threshold, the flow identifier of a number (e.g., one or more) of the data flows is changed to a different flow identifier. This change results in the number of the data flows redirected to a different path. In an alternate embodiment, another method is provided for congestion avoidance. In this method, a data flow transmitted along a single path is received, and the data flow is split into multiple micro data flows. A different flow identifier is then assigned to each micro data flow. This change results in the multiple micro data flows distributed along multiple different paths.

摘要翻译： 在一个实施例中，提供了一种用于拥塞缓解的方法。 在该方法中，相对于阈值监视沿着路径的数据流的拥塞级别。 这里，每个数据流与流标识符相关联。 基于拥塞级别超过阈值的检测，数据流（例如，一个或多个）的流标识被改变为不同的流标识符。 此更改导致重定向到不同路径的数据流的数量。 在替代实施例中，提供了另一种用于拥塞避免的方法。 在该方法中，接收沿着单个路径发送的数据流，并将数据流分割为多个微数据流。 然后将不同的流标识符分配给每个微数据流。 这种变化导致沿着多个不同路径分布的多个微数据流。

公开(公告)号：US09088669B2

公开(公告)日：2015-07-21

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 ,  H04M11/06 ,  H04L12/46 ,  H04L29/12

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.

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。 用户帧由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。

公开(公告)号：US08804534B2

公开(公告)日：2014-08-12

申请号：US11804615

申请日：2007-05-19

申请人： Samer M. Salam ,  Thomas D. Nadeau ,  Luca Martini ,  Ali Sajassi

发明人： Samer M. Salam ,  Thomas D. Nadeau ,  Luca Martini ,  Ali Sajassi

IPC分类号： H04L1/00 ,  H04L12/24

CPC分类号： H04L41/06 ,  H04L41/0226 ,  H04L45/50 ,  H04L67/28 ,  H04L67/2861 ,  H04L69/40

摘要： In one embodiment, a method includes receiving, by a provider edge (PE) device, a transport layer status message indicative of a defect on a pseudowire (PW) running across a core of a service provider (SP) network. The status message is translated to a service layer message indicative of the defect. The service layer message is then transmitted across an access domain of the SP network.

摘要翻译： 在一个实施例中，一种方法包括由提供者边缘（PE）设备接收指示在服务提供商（SP）网络的核心上运行的伪线（PW）上的缺陷的传输层状态消息。 状态消息被转换为指示缺陷的服务层消息。 服务层消息然后通过SP网络的接入域传输。

公开(公告)号：US08761048B2

公开(公告)日：2014-06-24

申请号：US13471676

申请日：2012-05-15

申请人： Ali Sajassi ,  Samer Salam ,  Sami Boutros

发明人： Ali Sajassi ,  Samer Salam ,  Sami Boutros

IPC分类号： H04L12/28 ,  H04L12/24 ,  H04L29/12

CPC分类号： H04L41/12 ,  H04L29/12066 ,  H04L45/02 ,  H04L45/04 ,  H04L45/50 ,  H04L61/1511

摘要： In one embodiment, a method includes determining when a predetermined period of time has elapsed, and determining whether at least a first message has been obtained on a first port of a node during the predetermined period of time when it is determined that the predetermined period of time has elapsed. The method also includes identifying the first port as being connected to a single-homed site when it is determined that the at least first message has not been obtained on the first port during the predetermined period of time. The first port is identified as being connected to a multi-homed network, a multi-homed device, or a hierarchical Ethernet segment when it is determined that the at least first message has been obtained on the first port during the predetermined period of time.

摘要翻译： 在一个实施例中，一种方法包括确定何时经过了预定的时间段，并且在确定在预定时间段的预定时间段内，确定在节点的第一端口上是否已经获得了至少第一消息 时间已经过去了 该方法还包括当在预定时间段内确定在第一端口上尚未获得至少第一消息时，将第一端口识别为连接到单个归属站点。 当在预定时间段内确定已经在第一端口上获得了至少第一消息时，第一端口被识别为连接到多归属网络，多归属设备或分层以太网段。

公开(公告)号：US08681641B1

公开(公告)日：2014-03-25

申请号：US12146345

申请日：2008-06-25

申请人： Ali Sajassi ,  Norman Finn ,  Francois Tallet

发明人： Ali Sajassi ,  Norman Finn ,  Francois Tallet

IPC分类号： H04J1/16 ,  H04L12/28 ,  H04L12/56 ,  H04J3/14 ,  H04L1/00

CPC分类号： H04L45/745 ,  H04L1/00 ,  H04L12/462 ,  H04L12/4641 ,  H04L45/18

摘要： A technique is provided for mitigating loops in Ethernet networks. A first port in an Ethernet device receives an Ethernet frame. The frame includes a source identifier, a destination identifier, and a Virtual Local Area Network Identifier (VLAN ID). According to various embodiments, the VLAN ID (VID) has the encoding of both a community group as well as a source bridge ID. A VID database is accessed using the destination identifier and the VID to determine whether the first port has ingress enabled. A filtering database is accessed to determine an egress port for forwarding the Ethernet frame.

摘要翻译： 提供了一种减轻以太网网络环路的技术。 以太网设备中的第一个端口接收以太网帧。 该帧包括源标识符，目的地标识符和虚拟局域网标识符（VLAN ID）。 根据各种实施例，VLAN ID（VID）具有社区组以及源网桥ID的编码。 使用目标标识符和VID访问VID数据库，以确定第一个端口是否启用了入口。 访问过滤数据库以确定用于转发以太网帧的出口端口。

公开(公告)号：US08650286B1

公开(公告)日：2014-02-11

申请号：US13087259

申请日：2011-04-14

申请人： Ali Sajassi ,  Samer Salam

发明人： Ali Sajassi ,  Samer Salam

IPC分类号： G06F15/173

CPC分类号： H04L45/586 ,  H04L45/16 ,  H04L45/18 ,  H04L45/50

摘要： Methods, systems, and apparatus, including computer programs encoded on a storage media, for preventing looping and duplicate frame delivery in a network environment. A first control plane message is received from a first edge node in a plurality of edge nodes in a plurality of network elements of a network, the first control plane message identifying a first hint to be included in first multicast packets that include data originating from a first computing device interfaced with the first edge node and are forwarded to the network through the first edge node. A data record is stored identifying the association between the first hint and the first computing device. The data record is used to determine that multicast packets including the first hint originate from the first computing device and are not to be forwarded to the first computing device by edge nodes interfacing with the first computing device.

摘要翻译： 方法，系统和装置，包括在存储介质上编码的计算机程序，用于防止网络环境中的循环和重复帧传送。 从网络的多个网络元件中的多个边缘节点中的第一边缘节点接收第一控制平面消息，所述第一控制平面消息标识要被包括在第一多播分组中的第一提示，所述第一提示包括源自 第一计算设备与第一边缘节点接口并通过第一边缘节点转发到网络。 存储识别第一提示和第一计算设备之间的关联的数据记录。 数据记录用于确定包括第一提示的多播分组源自第一计算设备，并且不被与第一计算设备接口的边缘节点转发到第一计算设备。

公开(公告)号：US20130254359A1

公开(公告)日：2013-09-26

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

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：US20130148657A1

公开(公告)日：2013-06-13

申请号：US13313968

申请日：2011-12-07

申请人： Samer Salam ,  Ali Sajassi ,  Sami Boutros

发明人： Samer Salam ,  Ali Sajassi ,  Sami Boutros

IPC分类号： H04L12/56

CPC分类号： H04L45/68 ,  H04L12/4641 ,  H04L45/66

摘要： In one embodiment, a network device in a set of network devices obtains a pseudowire label for a Provider Edge (PE) device, where the pseudowire label corresponds to a Virtual Local Area Network (VLAN) on the PE device. In addition, the network device obtains a set of one or more MAC addresses reachable via the PE device, wherein the set of network devices support Ethernet Virtual Private Network (E-VPN) and are in the same redundancy group such that the set of network devices are coupled to the same customer edge device. The network device stores the pseudowire label in association with the set of one or more MAC addresses. The network device uses the pseudowire label to encapsulate traffic associated with the VLAN that is received from the customer edge device and destined to the set of MAC addresses reachable via the PE device.

摘要翻译： 在一个实施例中，一组网络设备中的网络设备获得用于提供商边缘（PE）设备的伪线标签，其中伪线标签对应于PE设备上的虚拟局域网（VLAN）。 另外，网络设备获得通过PE设备可达到的一个或多个MAC地址的集合，其中该组网络设备支持以太网虚拟专用网（E-VPN），并且处于相同的冗余组中，使得该组网络 设备耦合到相同的客户边缘设备。 网络设备将伪线标签与一组或多个MAC地址相关联地存储。 网络设备使用伪线标签封装与客户边缘设备接收到的VLAN相关联的流量，并发往可通过PE设备到达的一组MAC地址。

公开(公告)号：US08121041B2

公开(公告)日：2012-02-21

申请号：US11881917

申请日：2007-07-30

申请人： Ali Sajassi ,  Samer Salam

发明人： Ali Sajassi ,  Samer Salam

IPC分类号： H04L12/26

CPC分类号： H04L12/1863 ,  H04L12/413 ,  H04L41/0668 ,  H04L41/0677

摘要： A method and system for redundancy in Ethernet Virtual Connections (EVCs) are disclosed. In one embodiment, a method includes transmitting continuity check messages from a node in an Ethernet Virtual Connection connecting at least one root node and a plurality of leaf nodes in a point-to-multipoint or multipoint-to-multipoint connection, identifying a failure in a primary path between the root node and the leaf nodes, switching to a backup path, and advertising the switching to the backup path to at least one node.

摘要翻译： 公开了以太网虚拟连接（EVC）中冗余的方法和系统。 在一个实施例中，一种方法包括：从连接至少一个根节点和多个叶节点的点对多点或多点到多点连接中的以太网虚拟连接中的节点发送连续性检查消息，识别故障 根节点和叶节点之间的主要路径，切换到备份路径，并且向至少一个节点通告到备份路径的切换。