公开(公告)号：US08948169B2

公开(公告)日：2015-02-03

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 ,  H04L12/721 ,  H04L12/46

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：US08743886B2

公开(公告)日：2014-06-03

申请号：US12987815

申请日：2011-01-10

申请人： Manas Pati ,  Samer Salam ,  Keyur Patel ,  Ali Sajassi

发明人： Manas Pati ,  Samer Salam ,  Keyur Patel ,  Ali Sajassi

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/68 ,  H04L12/4625 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/24 ,  H04L45/54

摘要： In one embodiment, a method includes establishing in a Virtual Private Local Area Network (LAN) Service (VPLS) over Multi-Protocol Label Switching (MPLS) network a floating pseudowire between a first provider edge router and a redundancy group having a plurality of provider edge routers each configured to forward data toward a external device. Each provider edge router in the redundancy group is configured to maintain an active link to the external device. A provider edge router that is not a member of the redundancy group sends data directed to the external device through the floating pseudowire. Only one provider edge router in the redundancy group receives and forwards the particular data to the external device.

摘要翻译： 在一个实施例中，一种方法包括在通过多协议标签交换（MPLS）网络的虚拟专用局域网（LAN）服务（VPLS）中建立第一供应商边缘路由器与具有多个提供商的冗余组之间的浮动伪线 每个边缘路由器配置为向外部设备转发数据。 冗余组中的每个提供商边缘路由器被配置为维持到外部设备的活动链路。 不是冗余组成员的提供商边缘路由器通过浮动伪线发送定向到外部设备的数据。 冗余组中只有一个提供商边缘路由器接收并将特定数据转发到外部设备。

公开(公告)号：US20140010232A1

公开(公告)日：2014-01-09

申请号：US14019728

申请日：2013-09-06

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： H04L12/741

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（第一自治系统边界路由器（ASBR））接收第一多个提供商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：US08619595B2

公开(公告)日：2013-12-31

申请号：US12658503

申请日：2010-02-05

申请人： Ali Sajassi ,  Samer Salam

发明人： Ali Sajassi ,  Samer Salam

IPC分类号： G01R31/08

CPC分类号： H04L12/462 ,  H04L45/26

摘要： In one embodiment, a method includes generating at an ingress routing bridge in a TRansparent Interconnection of Lots of Links (TRILL) network, a trace message for a specified flow along a path from the ingress routing bridge to a destination reachable through the TRILL network, transmitting a single trace message from the ingress routing bridge to a next-hop routing bridge in the TRILL network, receiving a plurality of reply messages in response to the transmitted trace message, and identifying the routing bridges in the path and a location of any fault in the path. An apparatus for fault isolation in a TRILL network is also disclosed.

摘要翻译： 在一个实施例中，一种方法包括在多个链路（TRILL）网络的跨平台互连中的入口路由桥上生成用于沿着从入口路由网桥到可通过TRILL网络到达的目的地的路径的指定流的跟踪消息， 将来自入口路由网桥的单个跟踪消息发送到TRILL网络中的下一跳路由桥接器，响应于所发送的跟踪消息接收多个应答消息，并且识别路径中的路由桥和任何故障的位置 在路上 还公开了一种用于TRILL网络中的故障隔离的设备。

公开(公告)号：US20130235876A1

公开(公告)日：2013-09-12

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： H04L12/56

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在第一端口上已经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：US08531941B2

公开(公告)日：2013-09-10

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： H04L12/28

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.

公开(公告)号：US20130201986A1

公开(公告)日：2013-08-08

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： H04L12/56

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.

公开(公告)号：US20120201247A1

公开(公告)日：2012-08-09

申请号：US13448588

申请日：2012-04-17

申请人： Ali Sajassi ,  Norman W. Finn

发明人： Ali Sajassi ,  Norman W. 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：US08004968B2

公开(公告)日：2011-08-23

申请号：US12344099

申请日：2008-12-24

申请人： Ali Sajassi ,  Samer Salam

发明人： Ali Sajassi ,  Samer Salam

IPC分类号： H04J3/16

CPC分类号： H04L12/2859 ,  G06F11/2007 ,  H04L69/40

摘要： In one embodiment, a system comprises a plurality of provider edge (PE) devices, the PE devices having a plurality of ports; and a pseudo-link aggregation control protocol (LACP) module instantiated for each of the ports. The pseudo-LACP module allows the PE devices to support dual-homing of an access side, the access side including either an access node or an access network, without running any control protocol for redundancy on the access side.

摘要翻译： 在一个实施例中，系统包括多个提供商边缘（PE）设备，所述PE设备具有多个端口; 以及针对每个端口实例化的伪链路聚合控制协议（LACP）模块。 伪LACP模块允许PE设备支持接入侧的双归属，接入侧包括接入节点或接入网络，而不在接入侧运行任何用于冗余的控制协议。

公开(公告)号：US07975180B2

公开(公告)日：2011-07-05

申请号：US12655108

申请日：2009-12-23

申请人： Ali Sajassi ,  Norman W. Finn

发明人： Ali Sajassi ,  Norman W. Finn

IPC分类号： G06F11/00

CPC分类号： H04L41/0659 ,  H04L12/2852 ,  H04L12/462 ,  H04L43/10

摘要： Apparatus and method of detecting a fault in a network service includes an Ethernet access network domain in which a heartbeat message is broadcast at a periodic interval by each of a plurality of edge devices associated with an instance of the network service. Each of the edge devices also receives the heartbeat messages broadcast at the periodic interval from other edge devices. A fault occurrence is identified when the edge device fails to receive an expected heartbeat message at the periodic interval from one of the other edge devices.

摘要翻译： 检测网络服务中的故障的装置和方法包括：以太网接入网络域，其中通过与网络服务的实例相关联的多个边缘设备中的每一个以周期性间隔广播心跳消息。 每个边缘设备还接收从其他边缘设备以周期性间隔广播的心跳消息。 当边缘设备未能以其他边缘设备之一的周期性间隔接收到预期的心跳消息时，会发现故障发生。