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    Distributed connection-oriented services for switched communication networks
    3.
    发明申请
    Distributed connection-oriented services for switched communication networks 有权
    用于交换通信网络的分布式面向连接的服务

    公开(公告)号：US20050083949A1

    公开(公告)日：2005-04-21

    申请号：US10791655

    申请日：2004-03-01

    申请人： Kurt Dobbins ,  Thomas Grant ,  David Ruffen ,  Laura Kane ,  Theodore Len ,  Philip Andlauer ,  David Bahi ,  Kevin Yohe ,  Brendan Fee ,  Chris Oliver ,  David Cullerot ,  Michael Skubisz

    发明人： Kurt Dobbins ,  Thomas Grant ,  David Ruffen ,  Laura Kane ,  Theodore Len ,  Philip Andlauer ,  David Bahi ,  Kevin Yohe ,  Brendan Fee ,  Chris Oliver ,  David Cullerot ,  Michael Skubisz

    IPC分类号： H04L12/18 ,  H04L12/24 ,  H04L12/46 ,  H04L12/56 ,  H04L12/28

    CPC分类号： H04L45/04 ,  H04L12/18 ,  H04L12/1877 ,  H04L12/1886 ,  H04L12/46 ,  H04L12/4641 ,  H04L12/467 ,  H04L41/0213 ,  H04L45/16 ,  H04L45/24 ,  H04L45/34 ,  H04L49/201 ,  H04L49/351 ,  H04L49/354 ,  H04L2212/00

    摘要： Method and apparatus providing connection-oriented services for packet switched data communications networks. Directory services include distributed discovery of MAC addresses and protocol alias addresses. Topology services include a link state topology exchange among switches, which provides each switch with a complete topology graph of the network. This enables an access switch receiving a data packet to determine a complete path from a source end system to a destination end system. Another service includes resolution of broadcast frames to unicast frames, in order to reduce the amount of broadcast traffic. Policy restrictions may be applied prior to connection setup. Path determination services enable multiple paths from a source to a destination. Connection management includes source routed mapping of connections on the desired path. A distributed call rerouting service is provided wherein if a link on an active path fails, each switch receives a topology change notification and unmaps any connection involving the failed link. A broadcast/unknown service provides restricted flooding of nonresolvable packets. Furthermore, connection-oriented switching is provided based on the source and destination MAC addresses as a connection identifier. Still further, resolution of networks outside the switch domain is enabled by access switches listening for network and server route advertisements and maintaining best routes to said networks and servers. The best route metrics may be combined with best path metrics to determine a path from a first access switch to an egress switch connected to the external network.

    摘要翻译： 为分组交换数据通信网络提供面向连接的服务的方法和装置。 目录服务包括MAC地址和协议别名地址的分布式发现。 拓扑服务包括交换机之间的链路状态拓扑交换，为每个交换机提供网络的完整拓扑图。 这使得接收数据分组的接入交换机能够确定从源端系统到目的端系统的完整路径。 另一种服务包括将广播帧分解成单播帧，以便减少广播流量。 在连接设置之前可能会应用策略限制。 路径确定服务启用从源到目的地的多条路径。 连接管理包括在所需路径上的连接的源路由映射。 提供了一种分布式呼叫路由服务，其中如果活动路径上的链路​​发生故障，则每个交换机接收拓扑变化通知并解除涉及故障链路的任何连接。 广播/未知服务提供不可解析包的受限洪泛。 此外，基于源和目的地MAC地址作为连接标识符提供面向连接的交换。 此外，交换机域外的网络的分辨率由接入交换机监听网络和服务器路由通告以及维护到所述网络和服务器的最佳路由来实现。 最佳路由度量可以与最佳路径度量相结合以确定从第一接入交换机到连接到外部网络的出口交换机的路径。