公开(公告)号：US07792111B2

公开(公告)日：2010-09-07

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： H04L12/28 ,  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：US07633956B1

公开(公告)日：2009-12-15

申请号：US11349451

申请日：2006-02-06

申请人： Harshavardhan Parandekar ,  Ali Sajassi ,  Sanjay Dhar

发明人： Harshavardhan Parandekar ,  Ali Sajassi ,  Sanjay Dhar

IPC分类号： H04L12/56

CPC分类号： H04L12/465 ,  H04L12/2859 ,  H04L12/2898

摘要： A network device has a network interface to allow the device to send and receive traffic across a network. The device also has a cable connection to allow the device to exchange data with at least one cable modem and a processor to associate a cable interface and cable service identifier with a cable modem; receive a packet from the cable modem; and insert a layer 2 network identifier, the identifier comprising two service provider VLAN (SP-VLAN) tags, into the packet. The processor in the network device identifies a virtual trunk interface based on the outer SP-VLAN tag and identifies the virtual private network based on the inner SP-VLAN tag.

摘要翻译： 网络设备具有允许设备通过网络发送和接收流量的网络接口。 该设备还具有电缆连接，以允许设备与至少一个电缆调制解调器和处理器交换数据，以将电缆接口和有线服务标识符与电缆调制解调器相关联; 从电缆调制解调器接收数据包; 并将包含两个服务提供商VLAN（SP-VLAN）标签的标识符插入到分组中。 网络设备中的处理器基于外部SP-VLAN标签识别虚拟中继接口，并根据内部SP-VLAN标签识别虚拟专用网络。

公开(公告)号：US20090016365A1

公开(公告)日：2009-01-15

申请号：US11827772

申请日：2007-07-13

申请人： Ali Sajassi ,  Keyur Patel ,  Chandrashekhar Appanna ,  Stefano Previdi

发明人： Ali Sajassi ,  Keyur Patel ,  Chandrashekhar Appanna ,  Stefano Previdi

IPC分类号： H04L12/66

CPC分类号： H04L45/745 ,  H04L45/02 ,  H04L45/04 ,  H04L45/50

摘要： In one embodiment, a method includes receiving, by a first autonomous system border router (ASBR) of a first autonomous system (AS), a first plurality of provider-provisioned media access control (B-MAC) addresses via Interior Border Gateway Protocol (I-BGP). Each of first plurality of B-MAC addresses is associated with a provider edge (PE) device of the first AS. The first ASBR sends the first plurality of B-MAC addresses to a second ASBR of a second AS using Exterior Border Gateway Protocol (E-BGP). The first ASBR also receives via E-BGP a second plurality of B-MAC addresses each of which is associated with a PE device of the second AS. The first ASBR then distributes the second plurality of B-MAC addresses to each of the PE devices of the first AS using I-BGP.

摘要翻译： 在一个实施例中，一种方法包括由第一自治系统（AS）的第一自治系统边界路由器（ASBR）通过内部边界网关协议（第一自治系统（ASBR））接收第一多个提供者提供的媒体访问控制（B-MAC） I-BGP）。 第一多个B-MAC地址中的每一个与第一AS的提供商边缘（PE）设备相关联。 第一ASBR使用外部边界网关协议（E-BGP）向第二AS的第二ASBR发送第一多个B-MAC地址。 第一ASBR还经由E-BGP接收第二多个B-MAC地址，每个B-MAC地址与第二AS的PE设备相关联。 第一ASBR然后使用I-BGP将第二多个B-MAC地址分配给第一AS的每个PE设备。

公开(公告)号：US20080285466A1

公开(公告)日：2008-11-20

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： H04L12/26 ,  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. 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.

摘要翻译： 在一个实施例中，一种方法包括由提供商边缘（PE）设备接收指示在跨服务提供商（SP）网络的核心运行的伪线（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。 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。

公开(公告)号：US20070025277A1

公开(公告)日：2007-02-01

申请号：US11296550

申请日：2005-12-07

申请人： Ali Sajassi ,  Dino Farinacci ,  John Zwiebel ,  Daniel Alvarez

发明人： Ali Sajassi ,  Dino Farinacci ,  John Zwiebel ,  Daniel Alvarez

IPC分类号： H04L12/28

CPC分类号： H04L45/00 ,  H04L45/26

摘要： A provider edge (PE) node of a network operates to send a trace path message over the network to a receiver PE node, the trace path message recording a list of intermediate nodes of a unicast path from the PE node to the receiver PE node; and receive a join message initiated from the receiver PE node, the join message using the list to propagate to the source PE node through the intermediate nodes such that a branch of a multicast tree is aligned with the unicast path. 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： 网络的提供者边缘（PE）节点操作以通过网络向接收者PE节点发送跟踪路径消息，跟踪路径消息记录从PE节点到接收者PE节点的单播路径的中间节点列表; 并接收从接收者PE节点发起的加入消息，使用该列表的加入消息通过中间节点传播到源PE节点，使得多播树的分支与单播路径对齐。 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：US20060047851A1

公开(公告)日：2006-03-02

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： 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.

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，其包括分别连接在核心网络上的第一和第二冗余伪线（PW），当主数据 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。

公开(公告)号：US20050190757A1

公开(公告)日：2005-09-01

申请号：US10789141

申请日：2004-02-27

申请人： Ali Sajassi

发明人： Ali Sajassi

IPC分类号： H04L12/28 ,  H04L12/46 ,  H04L12/56

CPC分类号： H04L45/00 ,  H04L12/2856 ,  H04L12/2881 ,  H04L45/507 ,  H04L45/586

摘要： A method and apparatus for interworking between customer edge (CE) devices connected to provider edge (PE) devices via attachment circuits (ACs), the PE devices routing packets across a service provider (SP) network, the CE devices including one or more Ethernet CE devices and a non-Ethernet CE. A virtual switch instance (VSI) is provided on a first PE device coupled to the non-Ethernet CE. The first PE device also including a virtual routing forwarding (VRF) entity interfaced with the VSI such that the SP network appears to offer L3VPN service toward the non-Ethernet CE and VPLS toward the one or more Ethernet CE devices. 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： 一种用于通过连接电路（AC）与连接到提供商边缘（PE）设备的客户边缘（CE）设备之间进行交互的方法和装置，所述PE设备通过服务提供商（SP）网络路由分组，所述CE设备包括一个或多个以太网 CE设备和非以太网CE。 在耦合到非以太网CE的第一PE设备上提供虚拟交换机实例（VSI）。 第一PE设备还包括与VSI接口的虚拟路由转发（VRF）实体，使得SP网络似乎向一个或多个以太网CE设备向非以太网CE和VPLS提供L 3 VPN服务。 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）。