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    Backbone forwarding scheme for multiport network switch
    21.
    发明授权
    Backbone forwarding scheme for multiport network switch 有权
    用于多端口网络交换机的骨干转发方案

    公开(公告)号：US06584106B1

    公开(公告)日：2003-06-24

    申请号：US09317146

    申请日：1999-05-24

    Applicant: Shashank Merchant ,  Robert Williams

    Inventor： Shashank Merchant ,  Robert Williams

    IPC: H04J1228

    CPC classification number: H04L49/351 ,  H04L49/201 ,  H04L49/3027 ,  H04L49/352 ,  H04L49/354

    Abstract: A novel method of data forwarding is provided in a network switch having multiple ports including at least one backbone port for data communications with backbone network nodes. Destination information of a received data packet is compared with a predetermined set of address data in an address table. If the packet's destination information is not found in the address table, the received data packet is forwarded to the backbone port. Further, the source address information of the received data packet may be compared with the address table. In a regular mode of operation, if the packet's source address information is not found in the address table, this information is added to the address table. However, in a backbone mode of operation, the address information of a data packet received from the backbone port is prevented from being added to the address table. The switch may have backbone ports provided for multiple VLANs supported by the switch. A first data packet received from a first VLAN is forwarded to at least one backbone port for that VLAN, if the packet's destination information is not found in the address table. Similarly, a second data packet received from a second VLAN is forwarded to at least one backbone port for the second VLAN if the packet's destination information is not found in the address table. A backbone vector storage is provided for identifying backbone ports for the multiple VLANs supported by the switch.

    Abstract translation: 在具有多个端口的网络交换机中提供了一种新颖的数据转发方法，所述多个端口包括用于与骨干网节点进行数据通信的至少一个骨干端口。 将接收到的数据分组的目的地信息与地址表中的预定地址数据集进行比较。 如果在地址表中找不到数据包的目的地信息，则将接收的数据包转发到骨干端口。 此外，可以将接收到的数据分组的源地址信息与地址表进行比较。 在常规操作模式下，如果在地址表中没有找到数据包的源地址信息，则将该信息添加到地址表。 然而，在骨干运营方式中，防止从骨干端口接收到的数据分组的地址信息被添加到地址表。 交换机可能具有为交换机支持的多个VLAN提供的骨干端口。 如果在地址表中没有找到数据包的目的地信息，则从第一个VLAN接收的第一个数据包转发到该VLAN的至少一个骨干端口。 类似地，如果在地址表中没有找到分组的目的地信息，则从第二VLAN接收的第二数据分组被转发到用于第二VLAN的至少一个骨干端口。 提供骨干矢量存储，用于识别交换机支持的多个VLAN的骨干端口。

    Method and apparatus for controlling the flow of data frames through a network switch on a port-by-port basis
    22.
    发明授权
    Method and apparatus for controlling the flow of data frames through a network switch on a port-by-port basis 有权
    用于通过逐个端口的网络交换机来控制数据帧的流动的方法和装置

    公开(公告)号：US06405258B1

    公开(公告)日：2002-06-11

    申请号：US09304963

    申请日：1999-05-05

    Applicant: Bahadir Erimli ,  Robert Williams ,  Shashank Merchant

    Inventor： Bahadir Erimli ,  Robert Williams ,  Shashank Merchant

    IPC: G06F1300

    CPC classification number: H04L47/29 ,  H04L29/06 ,  H04L47/10 ,  H04L47/266 ,  H04L47/30 ,  H04L49/90 ,  H04L49/901

    Abstract: An apparatus and method are disclosed for regulating the flow of data between plural network stations through a network switch. A receive port functions to receive data frames from a first network station, and a transmit port outputs the received data frames to a second network station. A programmable threshold register is provided for storing a threshold value that indicates a saturation level for the internal resources of the transmit port. Control circuitry is used to monitor the internal resources of the transmit port and determine whether or not the threshold value has been reached. If the threshold value has been reached, then the control circuitry will implement a flow control process that causes the first network station to discontinue transmission of data frames to the transmit port until the internal resources of the transmit port fall below the threshold value.

    Abstract translation: 公开了一种用于通过网络交换机来调节多个网络站之间的数据流的装置和方法。 接收端口用于从第一网络站接收数据帧，并且发送端口将接收到的数据帧输出到第二网络站。 提供了可编程阈值寄存器，用于存储指示发送端口的内部资源的饱和电平的阈值。 控制电路用于监视发送端口的内部资源，并确定是否达到阈值。 如果已经达到阈值，则控制电路将实现流控制过程，该流程控制过程使得第一网络站停止将数据帧发送到发送端口，直到发送端口的内部资源低于阈值。

    Micro-programmable protocol packet parser and encapsulator
    27.
    发明授权
    Micro-programmable protocol packet parser and encapsulator 失效
    微型可编程协议包解析器和封装器

    公开(公告)号：US07292586B2

    公开(公告)日：2007-11-06

    申请号：US09823802

    申请日：2001-03-30

    Applicant: Gautam Dewan ,  Prabhas Kejriwal ,  Manish Muthal ,  Shashank Merchant ,  Chi Fai Ho

    Inventor： Gautam Dewan ,  Prabhas Kejriwal ,  Manish Muthal ,  Shashank Merchant ,  Chi Fai Ho

    IPC: H04L12/28

    CPC classification number: H04L29/06 ,  G06F9/3885 ,  H04L69/12 ,  H04L69/22

    Abstract: A micro-programmable controller is disclosed for parsing a packet and encapsulating data to form a packet. The micro-programmable controller loads an instruction within the micro-controller. The instruction word has a plurality of instruction fields. The micro-controller processes the plurality of instruction fields in parallel. Each instruction field is related to a specific operation for parsing a packet or encapsulating data to form a packet. The programmable micro-controller can be programmed to handle packets to support new types of protocols by programming a template to string specific routines together based on an instruction set specific for parsing and encapsulating.

    Abstract translation: 公开了一种用于解析分组并封装数据以形成分组的微型可编程控制器。 微型可编程控制器加载微控制器内的指令。 指令字具有多个指令字段。 微控制器并行处理多个指令字段。 每个指令字段与用于解析分组或封装数据以形成分组的特定操作有关。 可编程微控制器可以编程为处理数据包以支持新类型的协议，方法是根据特定于解析和封装的指令集将模板编程到一起，将特定于特定的例程进行编程。

    Network switch multiple-port sniffing
    30.
    发明授权
    Network switch multiple-port sniffing 有权
    网络交换机多端口嗅探

    公开(公告)号：US07027437B1

    公开(公告)日：2006-04-11

    申请号：US09315973

    申请日：1999-05-21

    Applicant: Shashank Merchant ,  Robert Williams

    Inventor： Shashank Merchant ,  Robert Williams

    IPC: H04L12/56

    CPC classification number: H04L43/12 ,  H04L49/90 ,  H04L49/901

    Abstract: A novel system and method of monitoring network activity in a network switching system having multiple ports for receiving and transmitting data packets, and a decision making engine for controlling data forwarding between the ports. Data blocks representing received data packets are placed in data queues corresponding to the receive ports. The data queues are transferred to logic circuitry for processing in accordance with a predetermined algorithm to determine destination information. At least one port for transmitting data packets is identified based on the destination information. In addition, a sniffer port selected among the plurality of ports is identified as a transmit port to provide output of data packets received or transmitted by multiple sniffed ports. A traffic capture mechanism that enables the sniffer port to output data transferred via multiple sniffed ports includes a sniffer port configuration circuit for selecting the sniffer port, and a sniffed port configuration circuit for selecting the multiple sniffed ports. The sniffer port configuration circuit may provide a signal to enable or disable monitoring of data traffic on the multiple sniffed ports.

    Abstract translation: 一种具有用于接收和发送数据分组的多个端口的网络交换系统中的网络活动监视的新颖系统和方法，以及用于控制端口之间的数据转发的决策引擎。 表示接收到的数据分组的数据块被放置在对应于接收端口的数据队列中。 数据队列被传送到逻辑电路，以根据预定算法进行处理以确定目的地信息。 基于目的地信息来识别至少一个用于发送数据分组的端口。 此外，在多个端口中选择的嗅探器端口被识别为发送端口，以提供由多个嗅探端口接收或发送的数据分组的输出。 能够使嗅探器端口输出通过多个嗅探端口传输的数据的流量捕获机制包括用于选择嗅探器端口的嗅探器端口配置电路和用于选择多个嗅探端口的嗅探端口配置电路。 嗅探器端口配置电路可以提供用于启用或禁用对多个嗅探端口上的数据业务的监视的信号。

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