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    Backup CRF VLAN
    1.
    发明授权
    Backup CRF VLAN 有权
    备份CRF VLAN

    公开(公告)号：US06657951B1

    公开(公告)日：2003-12-02

    申请号：US09266198

    申请日：1999-03-10

    申请人： David A. Carroll ,  John K. Fitzgerald ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Gary William Kramling

    发明人： David A. Carroll ,  John K. Fitzgerald ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Gary William Kramling

    IPC分类号： H04L100

    CPC分类号： H04L12/433 ,  H04L12/4604

    摘要： A backup CRF VLAN arrangement provides an alternate, redundant path for traffic between undistributed Concentrator Relay Functions (CRFs) located on separate switches interconnected by trunk links of a distributed token ring bridge. The backup CRF virtual local area network (VLAN) arrangement defines a backup network path which may be utilized if a primary active path is not a valid path to a backup network. Notably, the backup network comprises a special type of CRF that is distributed among the switches, but that has only one port active at any given time.

    摘要翻译： 备份CRF VLAN布置为位于通过分布式令牌环形桥的中继链路互连的单独交换机之间的未分配的集中器中继功能（CRF）之间的流量提供了备用冗余路径。 备份CRF虚拟局域网（VLAN）布置定义了备用网络路径，如果主活动路径不是备用网络的有效路径，则可以使用备份网络路径。 值得注意的是，备份网络包括分布在交换机之间的特殊类型的CRF，但在任何给定时间只有一个端口处于活动状态。

    Distributed ring protocol and database
    2.
    发明授权
    Distributed ring protocol and database 有权
    分布式环协议和数据库

    公开(公告)号：US06674727B1

    公开(公告)日：2004-01-06

    申请号：US09266241

    申请日：1999-03-10

    申请人： David A. Carroll ,  John K. Fitzgerald ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Gary William Kramling

    发明人： David A. Carroll ,  John K. Fitzgerald ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Gary William Kramling

    IPC分类号： H04L12417

    CPC分类号： H04L12/467 ,  H04L12/417 ,  H04L12/433 ,  H04L12/46 ,  H04L12/4604

    摘要： A Distributed Ring Protocol (DRiP) arrangement includes a database and protocol for maintaining and distributing information within a distributed token ring (TR) bridge having a logical switch fabric that is distributed over a TR switching network of switches interconnected by trunk links, such as Inters witch Link (ISL) trunks. The DRiP information is used by switches within the ISL switched fabric to determine the status (configured and/or activated) and association (within a switch) of ports of the distributed bridge.

    摘要翻译： 分布式环协议（DRIP）配置包括用于在具有逻辑交换结构的分布式令牌环（TR）桥中维护和分发信息的数据库和协议，该逻辑交换结构分布在通过中继链路互连的交换机的TR交换网络上，诸如Inters 女巫链（ISL）树干。 DRIP信息由ISL交换结构中的交换机使用，以确定分布式桥接端口的状态（配置和/或激活）和关联（在交换机内）。

    Switched token ring over ISL (TR-ISL) network
    4.
    发明授权
    Switched token ring over ISL (TR-ISL) network 有权
    交换令牌环在ISL（TR-ISL）网络上

    公开(公告)号：US06704318B1

    公开(公告)日：2004-03-09

    申请号：US09265668

    申请日：1999-03-10

    申请人： Carson Stuart ,  David A. Carroll ,  Jeffrey W. Kidd ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Wayne Garavaglia

    发明人： Carson Stuart ,  David A. Carroll ,  Jeffrey W. Kidd ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Wayne Garavaglia

    IPC分类号： H04L1228

    CPC分类号： H04L12/4641 ,  H04L12/433 ,  H04L12/46 ,  H04L12/4604

    摘要： A technique efficiently transports token ring (TR) frames over trunks interconnecting switches of a distributed TR bridge. The TR bridge is characterized by a logical switch fabric that is distributed among the interconnected switches by the trunks, which are preferably interswitch link (ISL) trunks. Each switch includes a Bridge Relay Function (BRF) coupled to a plurality of Concentrator Relay Functions (CRFs) having a plurality of ports for receiving TR frames over TR segments. The BRF and CRF of the distributed TR bridge operate according to a 2-tier switching model wherein each CRF and BRF is assigned an individual virtual local area network identifier. The technique encapsulates the TR frames in a TR-ISL protocol format that accomodates differences in formats of various TR frames and that comports with the 2-tier switching model of the distributed TR bridge.

    摘要翻译： 一种技术通过互连分布式TR桥的交换机的中继线有效地传输令牌环（TR）帧。 TR桥的特征在于逻辑交换结构，其通过中继线在互连的交换机之间分布，优选地是交换机间链路（ISL）中继线。 每个交换机包括耦合到具有用于在TR段上接收TR帧的多个端口的多个集中器中继功能（CRF）的桥接中继功能（BRF）。 分布式TR网桥的BRF和CRF按照2层交换模式工作，其中每个CRF和BRF分配了一个单独的虚拟局域网标识符。 该技术将TR帧以TR-ISL协议格式封装，可以适应各种TR帧的格式差异，并且与分布式TR桥的2层交换模型相匹配。

    Token ring spanning tree protocol
    5.
    发明授权
    Token ring spanning tree protocol 有权
    令牌环生成树协议

    公开(公告)号：US06304575B1

    公开(公告)日：2001-10-16

    申请号：US09143994

    申请日：1998-08-31

    申请人： David A. Carroll ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Praveen Jain

    发明人： David A. Carroll ,  Kara J. Adams ,  Kenneth H. Potter, Jr. ,  Praveen Jain

    IPC分类号： H04L1228

    CPC分类号： H04L49/351 ,  H04L45/02 ,  H04L45/48 ,  H04L49/25

    摘要： An improved spanning tree protocol for use by token ring intermediate devices having one or more Concentrator Relay Function (CRF) entities and associated Bridge Relay Function (BRF) entities. Each CRF and BRF entity preferably includes a spanning tree engine and corresponding database for individually executing an instance of the spanning tree algorithm and is configured to select a different Bridge Protocol Data Unit (BPDU) message type for use in executing its respective spanning tree algorithm. The selection of BPDU message type by the CRF and BRF spanning tree engines preferably depends on the routing configuration of the associated CRF. The selection of BPDU message type by the CRF entities assures that they are dropped by legacy intermediate devices and only acted upon by the originating CRF or another CRF coupled thereto. The selection of BPDU message type by the BRF entities assures that they are passed through CRF entities unmodified and yet are acted upon by other BRF entities and/or any legacy intermediate devices coupled to the associated BRF entity.

    摘要翻译： 一种改进的生成树协议，用于具有一个或多个集中器中继功能（CRF）实体和相关联的中继功能（BRF）实体的令牌环中间设备使用。 每个CRF和BRF实体优选地包括生成树引擎和相应的数据库，用于单独执行生成树算法的实例，并且被配置为选择用于执行其相应生成树算法的不同的桥协议数据单元（BPDU）消息类型。 由CRF和BRF生成树引擎选择BPDU消息类型优选地取决于相关CRF的路由配置。 CRF实体对BPDU消息类型的选择确保它们由传统中间设备丢弃，并且仅由发起的CRF或耦合到其的另一个CRF进行操作。 BRF实体对BPDU消息类型的选择确保它们未经修改地通过CRF实体，并且被其他BRF实体和/或耦合到相关联的BRF实体的任何传统中间设备操作。