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    Method and apparatus for learning and switching frames in a distributed network switch
    1.
    发明授权
    Method and apparatus for learning and switching frames in a distributed network switch 有权
    分布式网络交换机学习和切换帧的方法和装置

    公开(公告)号：US06807172B1

    公开(公告)日：2004-10-19

    申请号：US09469459

    申请日：1999-12-21

    申请人： Herman Levenson ,  Jonathan Davar ,  Ajit Sanzgiri ,  Thomas J. Edsall ,  Chingwei Chang ,  Rong-Lung Lue ,  Saravanakumar Rajendran ,  Tuan Thanh Nguyen ,  Claudette Lucille Surma

    发明人： Herman Levenson ,  Jonathan Davar ,  Ajit Sanzgiri ,  Thomas J. Edsall ,  Chingwei Chang ,  Rong-Lung Lue ,  Saravanakumar Rajendran ,  Tuan Thanh Nguyen ,  Claudette Lucille Surma

    IPC分类号： H04L1228

    CPC分类号： H04L49/3009 ,  H04L49/101 ,  H04L49/30 ,  H04L49/351 ,  H04L49/354 ,  H04L49/40

    摘要： A technique enables learning and switching of frames between line cards that are interconnected by a switch fabric of a distributed network switch. The network switch comprises a router and a plurality of forwarding engines, each having an associated forwarding table. The distributed learning and switching technique configures (i) the router to issue an extra copy of a routed frame to an ingress card having a port attached to the source of the frame; (ii) the router to ensure that the contents of a source index field of the routed frame header indicate that the frame originated from the ingress card; (iii) the router to assert a shortcut bit in the header of the routed frame; (iv) a forwarding engine on an egress card having a port attached to the destination of the frame to generate and issue a media access control notification frame to the ingress card and (v) a forwarding engine on the ingress card to mark an established entry in a layer 2 (L2) portion of its forwarding table as ineligible for normal L2 aging policies.

    摘要翻译： 一种技术能够在由分布式网络交换机的交换结构互连的线路卡之间学习和切换帧。 网络交换机包括路由器和多个转发引擎，每个转发引擎具有相关联的转发表。 分布式学习和切换技术配置（i）路由器向已经连接到帧的源的端口的入口卡发布路由帧的额外副本; （ii）路由器，以确保路由帧头的源索引字段的内容指示帧来自入口卡; （iii）路由器在路由帧的头部中断言快捷位; （iv）在出口卡上的转发引擎，其具有连接到帧的目的地的端口，以生成并向入口卡发布媒体访问控制通知帧，以及（v）在入口卡上的转发引擎来标记已建立的条目 在其转发表的第2层（L2）部分不符合正常的L2老化策略。

    Method and apparatus for updating and synchronizing forwarding tables in a distributed network switch
    2.
    发明授权
    Method and apparatus for updating and synchronizing forwarding tables in a distributed network switch 有权
    用于在分布式网络交换机中更新和同步转发表的方法和装置

    公开(公告)号：US06735198B1

    公开(公告)日：2004-05-11

    申请号：US09469062

    申请日：1999-12-21

    申请人： Thomas J. Edsall ,  Herman Levenson ,  Claudette Lucille Surma ,  Ajit Sanzgiri ,  Saravanakumar Rajendran ,  Rong-Lung Lue ,  Tuan Thanh Nguyen

    发明人： Thomas J. Edsall ,  Herman Levenson ,  Claudette Lucille Surma ,  Ajit Sanzgiri ,  Saravanakumar Rajendran ,  Rong-Lung Lue ,  Tuan Thanh Nguyen

    IPC分类号： H04L1228

    CPC分类号： H04L45/54 ,  H04L49/3009 ,  H04L49/354 ,  H04L49/602

    摘要： A mechanism and technique updates and synchronizes forwarding tables contained on line cards that are interconnected by a switch fabric of a distributed network switch. The network switch is preferably a L3 or L4 switch comprising a plurality of forwarding engines distributed among the line cards. Each forwarding engine has an associated forwarding table, which preferably includes a L2 portion and L3/L4 portions. The L2 portion of the table is used to execute forwarding decision operations for frames forwarded among ports of the line cards, whereas the L3/L4 portions of the table are used to execute shortcut and forwarding operations for frames routed among the ports. The mechanism comprises a media access control (MAC) notification (MN) frame for updating and synchronizing the location of a destination port stored in the L2 portions of the forwarding tables.

    摘要翻译： 机制和技术更新并同步包含在由分布式网络交换机的交换结构互连的线路卡上的转发表。 网络交换机优选地是包括分配在线路卡之间的多个转发引擎的L3或L4交换机。 每个转发引擎具有相关联的转发表，其优选地包括L2部分和L3 / L4部分。 表的L2部分用于对线路卡端口之间转发的帧执行转发决策操作，而表的L3 / L4部分用于对端口之间路由的帧执行快捷和转发操作。 该机制包括用于更新和同步存储在转发表的L2部分中的目的地端口的位置的媒体访问控制（MAC）通知（MN）帧。

    IMPLEMENTING PVLANs IN A LARGE-SCALE DISTRIBUTED VIRTUAL SWITCH
    10.
    发明申请
    IMPLEMENTING PVLANs IN A LARGE-SCALE DISTRIBUTED VIRTUAL SWITCH 有权
    在大规模分布式虚拟交换机中实现PVLAN

    公开(公告)号：US20130315252A1

    公开(公告)日：2013-11-28

    申请号：US13477605

    申请日：2012-05-22

    申请人： Vishnu Emmadi ,  Munish Mehta ,  Saravanakumar Rajendran ,  Prashant Gandhi

    发明人： Vishnu Emmadi ,  Munish Mehta ,  Saravanakumar Rajendran ,  Prashant Gandhi

    IPC分类号： H04L12/56

    CPC分类号： H04L12/6418 ,  H04L12/4641 ,  H04L63/0227 ,  H04L63/0272 ,  H04L63/107 ,  H04W4/023 ,  H04W12/08

    摘要： In one embodiment, a list of source identifiers is maintained at a virtual switch. These source identifiers are allowed to send packets through the virtual switch to ports in a private virtual local area network (PVLAN). When a packet is received at the virtual switch from a particular source destined for a particular port in the PVLAN, the virtual switch determines whether a particular identifier associated with the particular source matches one of the source identifiers in the list. If that particular source identifier is not on the list, the packet is prevented from being forwarded to the particular port in the PVLAN.

    摘要翻译： 在一个实施例中，在虚拟交换机上维护源标识符的列表。 允许这些源标识符通过虚拟交换机发送到私有虚拟局域网（PVLAN）中的端口。 当虚拟交换机从虚拟交换机接收目的地为PVLAN中的特定端口的分组时，虚拟交换机确定与特定源相关联的特定标识符是否与列表中的一个源标识符匹配。 如果该特定源标识符不在列表中，则阻止该数据包转发到PVLAN中的特定端口。