Using multiple IGMP queriers in a layer 2 network
    1.
    发明授权
    Using multiple IGMP queriers in a layer 2 network 有权
    在第2层网络中使用多个IGMP查询器

    公开(公告)号:US08675658B2

    公开(公告)日:2014-03-18

    申请号:US13305305

    申请日:2011-11-28

    IPC分类号: H04L12/56

    摘要: Techniques disclosed herein include systems and methods for extending an IGMP broadcast domain (multicast domain) across a transport network without implementing IGMP snooping within the core of the transport network, yet while providing efficient transport within the core of the transport network. Techniques include dividing a single IGMP interface into multiple IGMP domains or sub-domains. A separate Querier is then elected for each IGMP domain using the single IGMP interface. Edge nodes of the transport network can be configured as the multiple IGMP Queriers, and then re-distribute sender information via a separate routing protocol. Requests can then be sent using the transport network control messaging or routing protocol instead of IGMP snoop messages to advertise multicast data streams in between the multiple IGMP domains (across the transport network). Traffic can then delivered efficiently between isolated access networks of a single Service Layer 2 Network.

    摘要翻译: 本文公开的技术包括跨传输网络扩展IGMP广播域(组播域)的系统和方法,而不在传输网络的核心内实现IGMP监听,同时在传输网络的核心内提供有效的传输。 技术包括将单个IGMP接口划分为多个IGMP域或子域。 然后使用单个IGMP接口为每个IGMP域选择单独的查询器。 可以将传输网络的边缘节点配置为多个IGMP查询器,然后通过单独的路由协议重新分配发送方信息。 然后可以使用传输网络控制消息传递或路由协议而不是IGMP侦听消息发送请求,以在多个IGMP域(跨传输网络)之间通告组播数据流。 然后可以在单个服务层2网络的隔离接入网络之间高效地传送流量。

    USING MULTIPLE IGMP QUERIERS IN A LAYER 2 NETWORK
    2.
    发明申请
    USING MULTIPLE IGMP QUERIERS IN A LAYER 2 NETWORK 有权
    在层2网络中使用多个IGMP查询器

    公开(公告)号:US20130136122A1

    公开(公告)日:2013-05-30

    申请号:US13305305

    申请日:2011-11-28

    IPC分类号: H04L12/56

    摘要: Techniques disclosed herein include systems and methods for extending an IGMP broadcast domain (multicast domain) across a transport network without implementing IGMP snooping within the core of the transport network, yet while providing efficient transport within the core of the transport network. Techniques include dividing a single IGMP interface into multiple IGMP domains or sub-domains. A separate Querier is then elected for each IGMP domain using the single IGMP interface. Edge nodes of the transport network can be configured as the multiple IGMP Queriers, and then re-distribute sender information via a separate routing protocol. Requests can then be sent using the transport network control messaging or routing protocol instead of IGMP snoop messages to advertise multicast data streams in between the multiple IGMP domains (across the transport network). Traffic can then delivered efficiently between isolated access networks of a single Service Layer 2 Network.

    摘要翻译: 本文公开的技术包括跨传输网络扩展IGMP广播域(组播域)的系统和方法,而不在传输网络的核心内实现IGMP监听,同时在传输网络的核心内提供有效的传输。 技术包括将单个IGMP接口划分为多个IGMP域或子域。 然后使用单个IGMP接口为每个IGMP域选择单独的查询器。 可以将传输网络的边缘节点配置为多个IGMP查询器,然后通过单独的路由协议重新分配发送方信息。 然后可以使用传输网络控制消息传递或路由协议而不是IGMP侦听消息发送请求,以在多个IGMP域(跨传输网络)之间通告组播数据流。 然后可以在单个服务层2网络的隔离接入网络之间高效地传送流量。

    SEPARATION OF EDGE AND ROUTING/CONTROL INFORMATION FOR MULTICAST OVER SHORTEST PATH BRIDGING
    3.
    发明申请
    SEPARATION OF EDGE AND ROUTING/CONTROL INFORMATION FOR MULTICAST OVER SHORTEST PATH BRIDGING 有权
    分离通道和路径/控制信息,用于跨越短路径桥路

    公开(公告)号:US20130077626A1

    公开(公告)日:2013-03-28

    申请号:US13242422

    申请日:2011-09-23

    IPC分类号: H04L12/56

    CPC分类号: H04L45/66

    摘要: Techniques disclosed herein include systems and methods for providing a scalable solution to transmit edge IP Multicast sender information in a Shortest Path Bridging (SPB) network. Control information is exchanged between Ingress Backbone Edge Bridges and Egress Backbone Edge Bridges using Multicast Flow Specific and type-length-value (TLV) structures, or other control messages, to announce available multicast streams at ingress nodes within the SPB network. Such exchanges of control messages trigger sending SPB specific Intermediate System To Intermediate System (IS-IS) TLV control message with path computation information via IS-IS control messages. This second set of control messages is exchanged within the SPB network and includes source-specific multicast stream information that is used by Backbone Core Bridges to establish a multicast forward state and compute multicast forwarding paths. Multicast data traffic can then be transmitted through the SPB network using a one-to-many distribution model.

    摘要翻译: 本文公开的技术包括用于提供可扩展解决方案以在最短路径桥接(SPB)网络中传送边缘IP多播发送者信息的系统和方法。 使用组播流特定和类型长度值(TLV)结构或其他控制消息在Ingress Backbone Edge Bridges和Egress Backbone Edge Bridges之间交换控制信息,以在SPB网络内的入口节点上宣布可用的组播流。 这种交换控制消息通过IS-IS控制消息触发发送SPB特定的具有路径计算信息的中间系统到中间系统(IS-IS)TLV控制消息。 该第二组控制消息在SPB网络内进行交换,并包括由Backbone Core Bridges用于建立组播转发状态并计算组播转发路径的源特定组播流信息。 然后可以使用一对多分布模型通过SPB网络传输组播数据流量。

    CONVEYING THE VLAN/L2 VSN/BRIDGING-DOMAIN OF THE INCOMING INTERFACE (IIF) WHEN TRANSPORTING MULTICAST TRAFFIC OVER A SHORTEST PATH BRIDGED (SPB) NETWORK
    4.
    发明申请
    CONVEYING THE VLAN/L2 VSN/BRIDGING-DOMAIN OF THE INCOMING INTERFACE (IIF) WHEN TRANSPORTING MULTICAST TRAFFIC OVER A SHORTEST PATH BRIDGED (SPB) NETWORK 有权
    当运输跨越最短路径(SPB)网络的多媒体业务时,传输入局接口(IIF)的VLAN / L2 VSN / BRIDGING-DOMAIN

    公开(公告)号:US20130077624A1

    公开(公告)日:2013-03-28

    申请号:US13241869

    申请日:2011-09-23

    IPC分类号: H04L12/56

    CPC分类号: H04L12/4662 H04L12/4633

    摘要: Techniques disclosed herein include systems and methods for improving multicast traffic operations in a Shortest Path Bridging (SPB) network by conveying bridging domain information of an incoming interface (IIF) when transporting multicast traffic over the SPB network. Techniques disclosed herein include modifying encapsulation packet header information of existing Mac-In-Mac fields to convey additional information that can be interpreted at edge nodes by modifying edge node interpretation of multicast data. Specifically, the value of the I-SID in the BMAC-DA field can be set to be different from the I-SID value in the I-TAG field. Carrying the L2 VSN I-SID value in the I-TAG allows the Egress BEBs to determine which VLAN/L2 VSN/Bridging-Domain of the IIF is in use, and then modify or preserve underlying header information accordingly.

    摘要翻译: 本文公开的技术包括当通过SPB网络传输多播流量时,通过传送输入接口(IIF)的桥接域信息来改善最短路径桥接(SPB)网络中的多播业务操作的系统和方法。 本文公开的技术包括修改现有Mac-In-Mac字段的封装分组报头信息,以传送可以通过修改多播数据的边缘节点解释来在边缘节点处解释的附加信息。 具体地说,BMAC-DA字段中的I-SID的值可以被设置为与I-TAG字段中的I-SID值不同。 在I-TAG中携带L2 VSN I-SID值允许出口BEB确定IIF的哪个VLAN / L2 VSN /桥接域正在使用,然后相应地修改或保留底层头信息。

    USAGE OF MASKED ETHERNET ADDRESSES BETWEEN TRANSPARENT INTERCONNECT OF LOTS OF LINKS (TRILL) ROUTING BRIDGES
    5.
    发明申请
    USAGE OF MASKED ETHERNET ADDRESSES BETWEEN TRANSPARENT INTERCONNECT OF LOTS OF LINKS (TRILL) ROUTING BRIDGES 有权
    在链路(TRILL)路由桥之间的透明互连之间的掩蔽以太网的使用

    公开(公告)号:US20120243539A1

    公开(公告)日:2012-09-27

    申请号:US13149066

    申请日:2011-05-31

    申请人: Srikanth Keesara

    发明人: Srikanth Keesara

    IPC分类号: H04L12/28 H04L12/56

    CPC分类号: H04L45/66

    摘要: Techniques herein include systems and methods that extend functionality of transport networks including Transparent Interconnect of Lots of Links (TRILL) networks. Techniques include using a portion of information within transport device address encapsulation headers for purposes other than identifying source and destination device addresses. The system masks a portion of bits in an address header for an address lookup in forwarding tables of a transport network node. The remaining bits in the address field(s) become free bits that can be used for a variety of application purposes, such as flow identifier selection. By using information fields that already exist in encapsulation headers, such techniques provide additional information without increasing packet size or requiring new protocols. Embodiments can combine Equal-cost multi-path routing (ECMP) functionality, Reverse Path Forwarding (RPF) checks, and Time to live (TTL) protection at the same time.

    摘要翻译: 这里的技术包括扩展传输网络的功能的系统和方法,包括多个链路的透明互连(TRILL)网络。 技术包括在传输设备地址封装报头内部使用一部分信息用于识别源设备地址和目标设备地址以外的目的。 该系统在传送网络节点的转发表中掩盖地址头中的位的一部分用于地址查找。 地址字段中的其余位成为可用于各种应用目的(例如流标识符选择)的空闲位。 通过使用封装头中已经存在的信息字段,这些技术提供附加信息,而不增加数据包大小或需要新的协议。 实施例可以同时组合等价多路径路由(ECMP)功能,反向路径转发(RPF)检查和生存时间(TTL)保护。

    Continuity check management in a link state controlled Ethernet network
    6.
    发明授权
    Continuity check management in a link state controlled Ethernet network 失效
    链路状态控制以太网中的连续性检查管理

    公开(公告)号:US08264970B2

    公开(公告)日:2012-09-11

    申请号:US12249946

    申请日:2008-10-12

    IPC分类号: H04L12/26 H04L12/28

    摘要: An OAM link trace message is sent from a source node to a target node in a link state protocol controlled Ethernet network. The link trace message using an 802.1ag format except, as a destination address, it uses either the unicast Ethernet MAC node ID of the target node, or the multicast destination address of the service instance. A method of network topology verification in a link state protocol controlled Ethernet network checks the link state protocol database at a node to ascertain the control plane topology view of at least part of the network. It then executes one or more Ethernet OAM commands from the node to ascertain the data plane topology view of the same part of the network. The control plane topology view of the network is compared to the data plane topology view of the network to see if they match. An error is flagged if they do not match.

    摘要翻译: OAM链路跟踪消息从源节点发送到链路状态协议控制的以太网中的目标节点。 使用802.1ag格式的链路跟踪消息,除了目的地址之外,它使用目标节点的单播以太网MAC节点ID或服务实例的组播目的地址。 在链路状态协议控制的以太网中网络拓扑验证的方法检查节点处的链路状态协议数据库,以确定网络的至少一部分的控制平面拓扑视图。 然后从节点执行一个或多个以太网OAM命令,以确定网络的同一部分的数据平面拓扑视图。 将网络的控制平面拓扑视图与网络的数据平面拓扑视图进行比较,看它们是否匹配。 如果错误不匹配,则会被标记。

    SHARED VIRTUAL TUNNELS SUPPORTING MAC LEARNING IN COMMUNICATION NETWORKS
    7.
    发明申请
    SHARED VIRTUAL TUNNELS SUPPORTING MAC LEARNING IN COMMUNICATION NETWORKS 有权
    共享的虚拟隧道支持MAC通信网络学习

    公开(公告)号:US20120063451A1

    公开(公告)日:2012-03-15

    申请号:US12916730

    申请日:2010-11-01

    IPC分类号: H04L12/56

    摘要: Embodiments herein include systems and methods for providing a mechanism for tunneled data transport within a dual homed access network. A tunnel manager, at a first network connectivity device in a transport network, identifies the transport network configured to interconnect at least two access networks for transporting data traffic between one or more end stations connected to the access networks. The first network connectivity device is coupled to a first access network. The tunnel manager identifies a second network connectivity device. The second network connectivity device is coupled to the first access network to provide the first access network dual homed access to the transport network via the first and second network connectivity devices. The tunnel manager creates a virtual tunnel that connects the first and second network connectivity devices to a third network connectivity device across the transport network. The virtual tunnel defines a same virtual tunnel having multiple paths such that the third network connectivity device learns a single virtual tunnel for device address learning.

    摘要翻译: 本文的实施例包括用于在双归位接入网络内提供用于隧道化数据传输的机制的系统和方法。 在传输网络中的第一网络连接设备处的隧道管理器识别配置成互连至少两个接入网络的传输网络,用于在连接到接入网络的一个或多个终端站之间传送数据业务。 第一网络连接设备耦合到第一接入网络。 隧道管理器识别第二个网络连接设备。 所述第二网络连接设备耦合到所述第一接入网络,以经由所述第一和第二网络连接设备向所述传输网络提供所述第一接入网络双归属接入。 隧道管理器创建虚拟隧道,该虚拟隧道将第一和第二网络连接设备连接到跨传输网络的第三网络连接设备。 虚拟隧道定义了具有多个路径的相同虚拟隧道,使得第三网络连接设备学习用于设备地址学习的单个虚拟隧道。

    Automatic MEP provisioning in a link state controlled Ethernet network
    8.
    发明授权
    Automatic MEP provisioning in a link state controlled Ethernet network 有权
    链路状态控制以太网中的自动MEP供应

    公开(公告)号:US07996559B2

    公开(公告)日:2011-08-09

    申请号:US12249944

    申请日:2008-10-12

    IPC分类号: G06F15/173

    摘要: Ethernet OAM MEPs are automatically configured in a link state protocol controlled Ethernet network. A node operating in the link state protocol controlled Ethernet network receives a Link State PDU (LSP) containing a TLV having a MEP associated with the Ethernet MAC node ID of a second node in the link state protocol controlled Ethernet network, where the path between the first and second node includes a plurality of links. The node updates a forwarding table to indicate an association between the MEP ID and a Ethernet MAC node ID of the second node. An Ethernet OAM maintenance endpoint is produced in a link state protocol controlled Ethernet network by hashing a Sys-ID to produce a MEP; storing the MEP in a TLV; and forwarding the TLV over the link state protocol controlled Ethernet network in an LSP.

    摘要翻译: 以太网OAM MEP自动配置在链路状态协议控制的以太网中。 在链路状态协议控制的以太网中操作的节点接收链路状态PDU(LSP),链路状态PDU(LSP)包含具有与链路状态协议控制的以太网中的第二节点的以太网MAC节点ID相关联的MEP的TLV, 第一和第二节点包括多个链接。 节点更新转发表以指示MEP ID与第二节点的以太网MAC节点ID之间的关联。 在链路状态协议控制的以太网网络中产生以太网OAM维护端点,通过散列Sys-ID产生MEP; 将MEP存储在TLV中; 并通过链路状态协议控制的以太网在LSP中转发TLV。

    Method and apparatus for resolving conflicting unicast advertisements in a transport network
    9.
    发明授权
    Method and apparatus for resolving conflicting unicast advertisements in a transport network 有权
    用于解决传输网络中的冲突单播通告的方法和装置

    公开(公告)号:US08949385B2

    公开(公告)日:2015-02-03

    申请号:US13246110

    申请日:2011-09-27

    摘要: A method, apparatus and computer program product for resolving conflicting unicast advertisements in transport network is presented. A particular Backbone Virtual Local Area Network (BVLAN) as a first BVLAN (BVLAN1) on a first network device in a transport network. The first network device receives a first message from a second network device advertising a first Backbone Media Access Channel (BMAC) on a first BVLAN (BMAC1,BVLAN1). The first network device receives a second message from a third network device advertising the (BMAC1,BVLAN1). The (BMAC1,BVLAN1) is assigned to the device of the second network device and the third network device having a lower Identifier (ID) value, wherein the ID value comprises one of the group comprising an Intermediate System to Intermediate System (ISIS) system ID and a Shortest Path Bridging (SPB) bridge ID.

    摘要翻译: 提出了一种用于解决传输网络中冲突单播广告的方法,装置和计算机程序产品。 作为传输网络中的第一网络设备上的第一BVLAN(BVLAN1)的特定骨干虚拟局域网(BVLAN)。 第一网络设备从在第一BVLAN(BMAC1,BVLAN1)上发布第一骨干媒体接入信道(BMAC)的第二网络设备接收第一消息。 第一网络设备从广告(BMAC1,BVLAN1)的第三网络设备接收第二消息。 (BMAC1,BVLAN1)被分配给第二网络设备的设备,并且具有较低标识符(ID)值的第三网络设备,其中ID值包括包括中间系统到中间系统(ISIS)系统的组之一 ID和最短路径桥接(SPB)桥ID。

    Automatic MEP provisioning in a link state controlled ethernet network
    10.
    发明授权
    Automatic MEP provisioning in a link state controlled ethernet network 有权
    在链路状态控制的以太网网络中自动MEP供应

    公开(公告)号:US08918538B2

    公开(公告)日:2014-12-23

    申请号:US13173807

    申请日:2011-06-30

    摘要: Ethernet OAM MEPs are automatically configured in a link state protocol controlled Ethernet network. A node operating in the link state protocol controlled Ethernet network receives a Link State PDU (LSP) containing a TLV having a MEP associated with the Ethernet MAC node ID of a second node in the link state protocol controlled Ethernet network, where the path between the first and second node includes a plurality of links. The node updates a forwarding table to indicate an association between the MEP ID and a Ethernet MAC node ID of the second node. An Ethernet OAM maintenance endpoint is produced in a link state protocol controlled Ethernet network by hashing a Sys-ID to produce a MEP; storing the MEP in a TLV; and forwarding the TLV over the link state protocol controlled Ethernet network in an LSP.

    摘要翻译: 以太网OAM MEP自动配置在链路状态协议控制的以太网中。 在链路状态协议控制的以太网中操作的节点接收链路状态PDU(LSP),链路状态PDU(LSP)包含具有与链路状态协议控制的以太网中的第二节点的以太网MAC节点ID相关联的MEP的TLV, 第一和第二节点包括多个链接。 节点更新转发表以指示MEP ID与第二节点的以太网MAC节点ID之间的关联。 在链路状态协议控制的以太网网络中产生以太网OAM维护端点,通过散列Sys-ID产生MEP; 将MEP存储在TLV中; 并通过链路状态协议控制的以太网在LSP中转发TLV。