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    Method and system for providing redundancy to asynchronous transfer mode emulated local-area networks
    1.
    发明授权
    Method and system for providing redundancy to asynchronous transfer mode emulated local-area networks 失效
    为异步传输模式提供冗余的模拟局域网的方法和系统

    公开(公告)号：US06226297B1

    公开(公告)日：2001-05-01

    申请号：US09017306

    申请日：1998-01-30

    申请人： Cedell A. Alexander ,  J. Kevin Frick ,  Edward J. Rovner ,  Matthew B. Squire

    发明人： Cedell A. Alexander ,  J. Kevin Frick ,  Edward J. Rovner ,  Matthew B. Squire

    IPC分类号： G01R3108

    CPC分类号： H04L45/00 ,  H04L45/22

    摘要： A method for providing redundancy to an Asynchronous Transfer Mode (ATM) emulated local-area network (LAN) is disclosed. The ATM emulated LAN is served by a primary LAN Emulation Server, a Broadcast and Unknown Server (LES/BUS), and a LAN Emulation Configuration Server (LECS). A backup LES/BUS is coupled to the ATM emulated LAN. A logical redundancy virtual channel connection (VCC) is then established between the primary LES/BUS and the backup LES/BUS. When the redundancy VCC is present between the primary LES/BUS and the backup LES/BUS, the backup LES/BUS is placed in a dormant mode. However, when the redundancy VCC is absence between the primary LES/BUS and the backup LES/BUS, the backup LES/BUS is activated to serve any request generated by the ATM emulated LAN.

    摘要翻译： 公开了一种用于向异步传输模式（ATM）仿真局域网（LAN）提供冗余的方法。 ATM仿真LAN由主要LAN仿真服务器，广播和未知服务器（LES / BUS）和LAN仿真配置服务器（LECS）提供。 备用LES / BUS耦合到ATM模拟LAN。 然后在主LES / BUS和备用LES / BUS之间建立逻辑冗余虚拟通道连接（VCC）。 当主LES / BUS和备用LES / BUS之间存在冗余VCC时，备用LES / BUS处于休眠模式。 然而，当主LES / BUS和备用LES / BUS之间的冗余VCC不存在时，备份LES / BUS被激活以服务由ATM仿真LAN产生的任何请求。

    Methods, systems, and computer program products for transmitting and receiving layer 2 frames associated with different virtual local area networks (VLANs) over a secure layer 2 broadcast transport network
    2.
    发明授权
    Methods, systems, and computer program products for transmitting and receiving layer 2 frames associated with different virtual local area networks (VLANs) over a secure layer 2 broadcast transport network 有权
    用于通过安全层2广播传输网络发送和接收与不同虚拟局域网（VLAN）相关联的第2层帧的方法，系统和计算机程序产品

    公开(公告)号：US08000344B1

    公开(公告)日：2011-08-16

    申请号：US11313187

    申请日：2005-12-20

    申请人： J. Kevin Frick

    发明人： J. Kevin Frick

    IPC分类号： H04J3/16

    CPC分类号： H04L63/0428 ,  H04L63/162

    摘要： Methods, systems, and computer program products for sending and receiving frames associated with different VLANs over a secure layer 2 broadcast transport network are disclosed. According to one method, a layer 2 frame is received at a transmit port of a layer 2 forwarding device. The layer 2 frame is to be sent over a secure layer 2 broadcast transport network. A VLAN identifier corresponding to a first VLAN is extracted from the layer 2 frame. The first VLAN identifier is mapped to a second VLAN identifier used by the secure broadcast transport layer 2 network to identify the first VLAN. A portion of the layer 2 frame including the first VLAN identifier is encrypted. The layer 2 frame is transmitted over the secure layer 2 broadcast transport network with the second VLAN identifier in a cleartext portion of the frame.

    摘要翻译： 公开了用于通过安全层2广播传输网络发送和接收与不同VLAN相关联的帧的方法，系统和计算机程序产品。 根据一种方法，在层2转发设备的发送端口处接收第2层帧。 第2层帧将通过安全层2广播传输网络发送。 从第2层帧中提取与第一VLAN对应的VLAN标识符。 第一个VLAN标识符被映射到安全广播传输层2网络用于标识第一个VLAN的第二个VLAN标识符。 包括第一VLAN标识符的第2层帧的一部分被加密。 层2帧通过安全层2广播传输网络传输，其中第二VLAN标识符在帧的明文部分中。