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    • 5. 发明授权
    • Configuring route properties for use in transport tree building
    • 配置用于传输树构建的路由属性
    • US08111702B1
    • 2012-02-07
    • US11960985
    • 2007-12-20
    • Ijsbrand WijnandsArjen BoersToerless EckertStefano Previdi
    • Ijsbrand WijnandsArjen BoersToerless EckertStefano Previdi
    • H04L12/28
    • H04L45/48H04L45/50H04L45/64
    • A mechanism is provided by which a transport tree identifier can be generated comprising both an opaque field, containing information that cannot be interpreted by core routers, and a non-opaque field, containing information that can be interpreted by core routers. The transport tree identifier is then used in the process of building a transport tree across a transport network. A transport network egress router can receive a request to join a multicast datastream from a downstream node outside of the transport network. The information contained in the join message that identifies the desired multicast datastream is encoded in the opaque field of the transport tree identifier. Information related to desired route properties is encoded in the non-opaque field, for interpretation by the core routers. The non-opaque field can also include an identifier of a root node core router for the transport tree. Route properties can be provided, for example, by selection and transmission from the customer itself, or route properties can be associated with a particular customer or associated with a port of an egress router coupled to the customer network.
    • 提供了一种机制,通过该机制可以生成传输树标识符,包括包含不能被核心路由器解释的信息的不透明字段和包含可由核心路由器解释的信息的非不透明字段。 然后,传输树标识符用于跨传输网络构建传输树的过程。 传输网络出口路由器可以从传输网络外部的下游节点接收到加入组播数据流的请求。 标识期望的多播数据流的加入消息中包含的信息被编码在传输树标识符的不透明字段中。 与所需路由属性相关的信息在非不透明字段中进行编码,以供核心路由器进行解释。 非不透明字段还可以包括用于传输树的根节点核心路由器的标识符。 可以例如通过从客户本身的选择和传输来提供路由属性,或者路由属性可以与特定客户相关联或者与耦合到客户网络的出口路由器的端口相关联。
    • 7. 发明申请
    • Dynamic multipoint tree rearrangement
    • 动态多点树重排
    • US20070091827A1
    • 2007-04-26
    • US11258640
    • 2005-10-26
    • Arjen BoersIjsbrand WijnandsLorenzo Vicisano
    • Arjen BoersIjsbrand WijnandsLorenzo Vicisano
    • H04L12/28
    • H04L45/00H04L12/185H04L45/16H04L45/50
    • A mechanism to dynamically map a multicast session to a transport tree to reduce flooding of egress routers on the transport tree is provided. A mechanism to reduce the length of time in which transient flooding can occur while the transport tree is being chosen or configured is also provided. The disclosed dynamic mapping mechanisms avoid interruption of an established multicast session. One mechanism disclosed provides for remapping of a multicast session by cloning an original transport tree with which the multicast session is associated, associating the multicast session with the cloned transport tree, and then reconfiguring the cloned transport tree in accord with edge egress routers that have subscribers to that multicast session.
    • 提供了一种将多播会话动态映射到传输树以减少传输树上出口路由器泛洪的机制。 还提供了一种用于减少在选择或配置传输树时可能发生瞬时洪泛的时间长度的机制。 所公开的动态映射机制避免建立的多播会话的中断。 所公开的一种机制提供了通过克隆与多播会话相关联的原始传输树来重新映射多播会话,将多播会话与克隆的传输树相关联,然后根据具有订阅者的边缘出口路由器重新配置克隆的传输树 到该多播会话。
    • 9. 发明授权
    • System and method for resolving conflicts in proxy routing information associated with multicast distribution trees
    • 用于解决与组播分发树相关联的代理路由信息中的冲突的系统和方法
    • US07529199B1
    • 2009-05-05
    • US11140861
    • 2005-05-31
    • Ijsbrand WijnandsArjen BoersToerless Eckert
    • Ijsbrand WijnandsArjen BoersToerless Eckert
    • H04L12/28
    • H04L45/00H04L45/16H04L45/48H04L45/60
    • A first message, received from a first device, identifies a multicast distribution tree and includes first information associated with a route leading to a root of the multicast distribution tree. A second message, received from a second device, also identifies that tree, but the second message includes second information, which conflicts with the first information. In one embodiment, the conflict is resolved by building a first version of the tree based on the first information and building a second version of the tree based on the second information. The first version is used to forward multicast packets to the first device, while the second version is used to forward multicast packets to the second device. In another embodiment, the conflict is resolved by selecting either the first information or the second information, based on a policy, and then building a single version of the tree corresponding to the selected information.
    • 从第一设备接收的第一消息标识组播分发树,并且包括与通向组播分发树的根的路由相关联的第一信息。 从第二设备接收的第二消息还标识该树,但是第二消息包括与第一信息冲突的第二信息。 在一个实施例中,通过基于第一信息构建树的第一版本并基于第二信息构建树的第二版本来解决冲突。 第一个版本用于将组播数据包转发到第一个设备,而第二个版本用于将组播数据包转发到第二个设备。 在另一个实施例中,通过基于策略选择第一信息或第二信息,然后构建与所选择的信息相对应的树的单个版本来解决冲突。