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31. 发明授权

US06515993B1 Method and apparatus for manipulating VLAN tags 有权
标题翻译：用于处理VLAN标签的方法和设备
公开(公告)号：US06515993B1
公开(公告)日：2003-02-04
申请号：US09321582
申请日：1999-05-28
申请人： Robert A. Williams , Bahadir Erimli , Shashank Merchant
发明人： Robert A. Williams , Bahadir Erimli , Shashank Merchant
IPC分类号： H04L1256
CPC分类号： H04L12/467 , H04L12/4645 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354
摘要： An integrated multiport switch operating in a packet switched network provides the capability to alter VLAN tags on a port by port basis. An internal rules checker (IRC) analyzes the header of a data frame to determine the frame type: untagged, VLAN-tagged, or priority-tagged. The IRC searches the untagged set table for the set of ports that are untagged for a particular VLAN. The IRC passes a forwarding descriptor that includes the frame type and a operational code (opcode) to a Port Vector FIFO logic (PVF). The PVF is responsible for creating a new opcode that instructs a dequeuing logic to add, remove, modify the VLAN tag, or send the frame unmodified. The opcodes generated by the PVF are individualized for each output port.
摘要翻译：在分组交换网络中操作的集成多端口交换机提供了逐个端口改变VLAN标签的能力。内部规则检查器（IRC）分析数据帧的头部以确定帧类型：未标记，VLAN标记或优先级标记。 IRC在未标记的集合表中搜索针对特定VLAN未标记的端口集合。 IRC将包含帧类型和操作码（opcode）的转发描述符传递给端口向量FIFO逻辑（PVF）。 PVF负责创建一个新的操作码，指示一个出队逻辑来添加，删除，修改VLAN标签，或者发送未修改的帧。由PVF生成的操作码针对每个输出端口进行个性化。

32. 发明授权

US06501734B1 Apparatus and method in a network switch for dynamically assigning memory interface slots between gigabit port and expansion port 有权
标题翻译：网络交换机中的装置和方法，用于在千兆端口和扩展端口之间动态分配存储器接口槽
公开(公告)号：US06501734B1
公开(公告)日：2002-12-31
申请号：US09317150
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04J116
CPC分类号： H04L49/103 , H04L49/254 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354 , H04L49/90 , H04L49/901
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol dynamically allocates external memory bandwidth slots between high data rate ports. An external memory interface determines if a high data rate port makes a request for a bandwidth slot and grants the request if made. The slot is taken from a selected group which is a subset of the total number of slots. If a request for the slot is not made, the external memory interface assigns the slot to another high data rate port. Lower data rate ports in the network switch are assigned fixed slots from those slots not from within the selected group of slots. The dynamic allocation of bandwidth slots between the high data rate port enables the efficient use of limited memory bandwidth resources.
摘要翻译：具有根据以太网（IEEE 802.3）协议的具有各个网络节点的数据分组全双工通信的交换机端口的网络交换机动态地在高数据速率端口之间分配外部存储器带宽时隙。外部存储器接口确定高数据速率端口是否对带宽槽进行请求，如果发出请求则确定该请求。时隙是从所选择的组中获取的，该组是总时隙数的子集。如果没有对插槽进行请求，则外部存储器接口将插槽分配给另一个高数据速率端口。网络交换机中的较低数据速率端口从这些时隙中分配固定时隙，而不是在所选择的时隙组内。高数据速率端口之间的带宽时隙的动态分配使得能够有效地利用有限的存储器带宽资源。

33. 发明授权

US06487199B1 Method and apparatus for maintaining randomly accessible copy number information on a network switch 有权
标题翻译：用于在网络交换机上维护随机可访问的副本号信息的方法和装置
公开(公告)号：US06487199B1
公开(公告)日：2002-11-26
申请号：US09286988
申请日：1999-04-07
申请人： Bahadir Erimli
发明人： Bahadir Erimli
IPC分类号： H04L1226
CPC分类号： H04L49/201 , H04L49/351
摘要： An apparatus for maintaining copy information pertaining to data frames received by a multiport switch that forwards received data frames to plural output ports includes a random access storage area and a control logic, both of which are located on the switch. The random access storage area stores a copy number that indicates the number of output ports that have not yet transmitted their copy of a designated data frame. The control logic addresses specific fixed locations within the random access storage area using frame pointers that identify where the received data frames are stored in an external memory. The information maintained in the random access storage area is accessible to all components of the multiport switch.
摘要翻译：用于维护与由多端口交换机接收的数据帧相关的复制信息的装置，其将接收到的数据帧转发到多个输出端口包括随机存取存储区域和控制逻辑，两者都位于交换机上。随机存取存储区域存储指示还没有发送其指定数据帧的副本的输出端口的数量的副本号。控制逻辑使用识别接收到的数据帧存储在外部存储器中的位置的帧指针来寻址随机存取存储区域内的特定固定位置。在多端口交换机的所有组件可以访问保持在随机存取存储区域中的信息。

34. 发明授权

US06233244B1 Method and apparatus for reclaiming buffers 失效
标题翻译：回收缓冲液的方法和装置
公开(公告)号：US06233244B1
公开(公告)日：2001-05-15
申请号：US08992927
申请日：1997-12-18
申请人： Thomas J. Runaldue , Bahadir Erimli , Chandan Egbert
发明人： Thomas J. Runaldue , Bahadir Erimli , Chandan Egbert
IPC分类号： G06F1206
CPC分类号： H04L49/9021 , G06F5/06 , H04L41/0213 , H04L49/20 , H04L49/255 , H04L49/30 , H04L49/3009 , H04L49/3027 , H04L49/351 , H04L49/354 , H04L49/45 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9073 , H04L49/9078 , H04L69/26 , H04Q3/54591 , H04Q2213/1316 , H04Q2213/13162
摘要： A method and arrangement for reclaiming buffers used to store frames, following the transmission of a frame, checks to determine whether the transmission of a frame is the last copy of that frame to be transmitted. If it is the last copy, or the only copy, the buffers storing that frame are reclaimed for reuse after the contents of each buffer are transmitted. If the frame is not the last copy, or it cannot be determined whether it is the last copy, then the frame is transmitted and a count of the number of transmitted copies of that frame is decremented. Once all of the copies have been transmitted, the buffer reclaiming process is initiated.
摘要翻译：用于回收用于存储帧的缓冲器的方法和装置，在发送帧之后，检查以确定帧的传输是否是要发送的帧的最后一个拷贝。如果是最后一个副本或唯一的副本，则在发送每个缓冲区的内容之后，存储该帧的缓冲区被回收以供重用。如果帧不是最后一个副本，或者不能确定它是否是最后一个副本，则发送帧，并且该帧的发送副本的数量减少。一旦所有副本都被传输，缓冲区回收过程就会启动。

35. 发明授权

US6061351A Multicopy queue structure with searchable cache area 失效
标题翻译：具有可搜索缓存区域的多重队列结构
公开(公告)号：US6061351A
公开(公告)日：2000-05-09
申请号：US993880
申请日：1997-12-18
申请人： Bahadir Erimli , Thomas J. Runaldue
发明人： Bahadir Erimli , Thomas J. Runaldue
IPC分类号： H04L13/08 , G06F5/06 , H04L12/18 , H04L12/24 , H04L12/56 , H04Q3/545 , H04L12/46
CPC分类号： H04L49/9047 , G06F5/06 , H04L12/18 , H04L41/0213 , H04L49/255 , H04L49/3027 , H04L49/90 , H04L49/901 , H04L49/9057 , H04L49/9073 , H04L49/9078 , H04Q3/54591 , H04L49/103 , H04L49/205 , H04L49/30 , H04L49/3009 , H04L49/351 , H04L49/354 , H04L49/45 , H04Q2213/1316 , H04Q2213/13162
摘要： An arrangement and a method of maintaining a count of the number of copies of a frame that have been transmitted from a network switch uses a cache memory to store the number of copies of a frame to be transmitted from the network switch. A queue is used to queue entries that indicate the transmission of a copy of a frame, and these queued entries are released to a buffer manager. Whenever a transmission is made of a copy of this frame, and the buffer manager examines the entry indicating this transmission after the entry leaves the queue, the buffer manager searches for a corresponding entry in the cache memory and changes the copy number (i.e., the count of the number of transmissions) of that frame in the cache memory.
摘要翻译：维护从网络交换机发送的帧的份数的计数的配置和方法使用高速缓冲存储器来存储要从网络交换机发送的帧的份数。队列用于对表示帧的副本的传输进行排队，并将这些排队的条目释放到缓冲管理器。每当传输由该帧的副本，并且缓冲器管理器检查在条目离开队列之后指示该传输的条目，则缓冲管理器搜索高速缓冲存储器中的相应条目并改变副本号（即，高速缓冲存储器中该帧的计数）。

36. 发明授权

US06052751A Method and apparatus for changing the number of access slots into a memory 失效
标题翻译：用于将存取槽的数量改变为存储器的方法和装置
公开(公告)号：US06052751A
公开(公告)日：2000-04-18
申请号：US992814
申请日：1997-12-18
申请人： Thomas J. Runaldue , Bahadir Erimli
发明人： Thomas J. Runaldue , Bahadir Erimli
IPC分类号： H04L13/08 , G06F11/26 , G06F12/00 , G06F13/00 , G06F13/10 , G06F13/16 , G06F13/24 , G06F15/00 , G06F15/16 , G08B5/00 , G11C11/412 , H04B7/14 , H04J3/02 , H04J3/12 , H04J3/22 , H04J3/24 , H04L12/18 , H04L12/24 , H04L12/28 , H04L12/413 , H04L12/44 , H04L12/46 , H04L12/50 , H04L12/54 , H04L12/66 , H04L12/861 , H04L12/863 , H04L12/879 , H04L12/931 , H04L12/933 , H04L12/935 , H04L12/937 , H04L12/939 , H04L12/947 , H04Q3/545 , H04Q11/00
CPC分类号： H04L49/3009 , G06F13/1605 , G06F13/24 , G11C11/412 , H04L12/4641 , H04L12/5693 , H04L41/0213 , H04L47/6225 , H04L49/103 , H04L49/201 , H04L49/25 , H04L49/255 , H04L49/30 , H04L49/3027 , H04L49/351 , H04L49/354 , H04L49/50 , H04L49/552 , H04L49/555 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9063 , H04L49/9073 , H04L49/9078 , H04L49/9084 , H04Q3/54591 , H04L12/1863 , H04L12/4645 , H04L12/467 , H04L49/3054 , H04L49/40 , H04Q2213/1316 , H04Q2213/13162
摘要： A scalable multiport switch that receives and transmits data through a plurality of ports is provided with a plurality of internal buses, an external memory interface, and a slot manager. The external memory interface is coupled to the internal buses and has an external memory port for coupling the external memory interface to an external memory. The slot manager schedules access to the external memory through the internal buses and the external memory interface in a series of time slots. Each slot consists of m clock cycles to transfer n bytes of data. The slot manager is operable at a selectable one of multiple frequencies, the operating frequency of the slot manager being selected to match an operating frequency of the external memory. The slot manager increases the number of slots per given period of time with increasing operating frequency of the slot manager, but maintains the number of clock cycles per slot constant, thereby providing greater access to other sources of data.
摘要翻译：通过多个端口接收和发送数据的可扩展多端口交换机被提供有多个内部总线，外部存储器接口和时隙管理器。外部存储器接口耦合到内部总线，并具有用于将外部存储器接口耦合到外部存储器的外部存储器端口。插槽管理器通过内部总线和外部存储器接口在一系列时隙中安排对外部存储器的访问。每个时隙由m个时钟周期组成，用于传输n个字节的数据。时隙管理器可操作在多个频率中的可选择的一个，选择时隙管理器的操作频率以匹配外部存储器的工作频率。插槽管理器随着时隙管理器的工作频率的增加而增加每给定时间段的时隙数量，但是保持每个时隙的时钟周期数不变，从而提供对其他数据源的更多访问。

37. 发明授权

US06917623B1 System and method for transferring data in a network device 失效
标题翻译：用于在网络设备中传输数据的系统和方法
公开(公告)号：US06917623B1
公开(公告)日：2005-07-12
申请号：US09816334
申请日：2001-03-26
申请人： Yatin R. Acharya , Bahadir Erimli
发明人： Yatin R. Acharya , Bahadir Erimli
IPC分类号： H04L12/54 , H04L12/56
CPC分类号： H04L49/351 , H04L49/3018
摘要： A network device includes a port filter, a first logic device, and a second logic device. The port filter receives a data frame and generates first data relating to the data frame. The first logic device generates second data for the received data frame. The second logic device receives the first data and determines whether the second data has been received. When the second data has not been received, the second logic prevents a transfer of different first data relating to a different data frame from the port filter.
摘要翻译：网络设备包括端口过滤器，第一逻辑设备和第二逻辑设备。端口滤波器接收数据帧并产生与数据帧有关的第一数据。第一逻辑设备生成接收到的数据帧的第二数据。第二逻辑设备接收第一数据并确定是否已经接收到第二数据。当没有接收到第二数据时，第二逻辑防止与端口滤波器相关的不同数据帧的不同的第一数据的传送。

38. 发明授权

US06862265B1 Weighted fair queuing approximation in a network switch using weighted round robin and token bucket filter 有权
标题翻译：使用加权轮询和令牌桶过滤器在网络交换机中加权公平排队近似
公开(公告)号：US06862265B1
公开(公告)日：2005-03-01
申请号：US09548613
申请日：2000-04-13
申请人： Syam Sundar V. Appala , Bahadir Erimli
发明人： Syam Sundar V. Appala , Bahadir Erimli
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L47/6225 , H04L47/50 , H04L47/527 , H04L47/623 , H04L49/254
摘要： An integrated network switch having multiple network switch ports for outputting data frames also includes a dequeuing system for selectively supplying a data frame for output according to a specified priority by an output switch port. The dequeuing system includes, for each network switch port, a plurality of priority queues configured for holding assigned data frames based on respective priorities assigned by switching logic. A weighted round robin scheduler supplies the assigned data frames held in the priority queues to the output switch port according to a prescribed weighted round robin scheduling. In addition, the dequeuing system uses token bucket filters for selectively passing the assigned data frames to the respective priority queues in a manner that ensures that a given data frame having a large size does not interfere with bandwidth reserved for high-priority packets requiring guaranteed quality of service. Each token bucket filter selectively passes the corresponding assigned data frame to the corresponding priority queue based on a determined availability of at least a required number of tokens corresponding to a determined size of the corresponding assigned data frame. If the token bucket filter determines an insufficient number of tokens are available relative to the required number of tokens, the token bucket filter either drops the frame or shifts the frame to a lower priority queue. Hence, weighted fair queuing can be approximated using weighted round robin scheduling without interference by large-sized data packets.
摘要翻译：具有用于输出数据帧的多个网络交换机端口的集成网络交换机还包括一个出口系统，用于通过输出交换机端口根据指定的优先级选择性地提供数据帧以进行输出。对于每个网络交换机端口，出队系统包括多个优先级队列，其被配置为基于由切换逻辑分配的各自的优先级来保持分配的数据帧。加权轮询调度器根据规定的加权轮询调度将保留在优先级队列中的分配的数据帧提供给输出交换机端口。此外，出队系统使用令牌桶过滤器以选择性地将分配的数据帧传递到相应的优先级队列，以确保具有大尺寸的给定数据帧不干扰保留用于需要保证质量的高优先级分组的带宽的服务。每个令牌桶过滤器基于确定的对应于相应的分配数据帧的确定大小的所需数量的令牌的可用性来选择性地将相应的分配的数据帧传递到相应的优先级队列。如果令牌桶过滤器确定相对于所需数量的令牌可用的令牌数量不足，则令牌桶过滤器丢弃帧或将帧移动到较低优先级队列。因此，加权公平排队可以使用加权轮询调度近似，而不受大尺寸数据包的干扰。

39. 发明授权

US06807179B1 Trunking arrangement in a network switch 有权
标题翻译：网络交换机中的中继排列
公开(公告)号：US06807179B1
公开(公告)日：2004-10-19
申请号：US09551554
申请日：2000-04-18
申请人： Mrudula Kanuri , Bahadir Erimli
发明人： Mrudula Kanuri , Bahadir Erimli
IPC分类号： H04J1256
CPC分类号： H04L49/351 , H04L49/3009
摘要： A network switch includes network switch ports, and switching logic for determining the output port for each received layer 2 type data packet. The switching logic includes an address table configured for storing address-based switching decisions, a trunk table configured for assigning each network switch port to a corresponding identified trunk, and a trunk distribution table identifying the network switch ports assigned to each identified trunk. The switching logic determines the output port for each corresponding received layer 2 type data packet based on a corresponding switching decision for the received layer 2 type data packet, and based on selection of an entry in the trunk distribution table based on information within the received layer 2 type data packet. Hence, the network switch is able to perform trunk-based switching with minimal complexity, ensuring switching of data packets at the wire rate.
摘要翻译：网络交换机包括网络交换机端口和用于确定每个接收到的第二层类型数据分组的输出端口的切换逻辑。切换逻辑包括配置用于存储基于地址的切换决定的地址表，被配置用于将每个网络交换机端口分配给对应的所识别的中继线的中继表，以及标识分配给每个已识别的中继线的网络交换机端口的中继分配表。切换逻辑基于接收到的层2类型数据分组的相应切换决定，并且基于根据接收层内的信息选择中继分配表中的条目来确定每个对应的接收层2型数据分组的输出端口 2型数据包。因此，网络交换机能够以最小的复杂度进行中继交换，确保数据包以线速率进行切换。

40. 发明授权

US06745246B1 Apparatus and method in a network switch for modifying a bandwidth request between a requestor and a router 有权
标题翻译：用于修改请求者和路由器之间的带宽请求的网络交换机中的装置和方法
公开(公告)号：US06745246B1
公开(公告)日：2004-06-01
申请号：US09493108
申请日：2000-01-28
申请人： Bahadir Erimli , Shr-jie Tzeng , Yatin Ramesh Acharya
发明人： Bahadir Erimli , Shr-jie Tzeng , Yatin Ramesh Acharya
IPC分类号： G06F15173
CPC分类号： H04L47/822 , H04L47/15 , H04L47/70 , H04L47/724 , H04L47/745 , H04L47/748 , H04L47/805
摘要： A network switch, configured for performing layer 2 and layer 3 switching in an Ethernet (IEEE 802.3) network without blocking of incoming data packets, includes a network switch port having a filter (i.e., a packet classifier module) configured for evaluating an incoming data packet on an instantaneous basis. The filter performs simultaneous comparisons between the incoming data stream of the data packet and multiple templates configured for identifying respective data protocols. The network switch uses the filter to detect the presence of an RFC 2205 compliant bandwidth reservation message from a host computer for reception by a router. The network switch is configured for selectively changing a requested quality of service specified in the bandwidth reservation message, based on a determined absence of available resources within the network switch. The network switch selectively increases the requested quality service, based on the determined absence of the available resources, to a value that will be denied by the router. Hence, the network switch can ensure that a router does not grant a bandwidth reservation message from a host computer that would cause the capacity of the network switch to be exceeded, without any modification to the host computer or the router, or any interference with the resource reservation protocol specified in RFC 2205.
摘要翻译：配置用于在以太网（IEEE 802.3）网络中执行层2和层3切换而不阻塞传入数据分组的网络交换机包括网络交换机端口，该网络交换机端口具有被配置用于评估输入数据的过滤器（即分组分类器模块）数据包立即进行。该过滤器执行数据包的输入数据流和配置用于识别相应数据协议的多个模板之间的同时比较。网络交换机使用该过滤器来检测来自主机的RFC2205兼容带宽预留消息的存在以便路由器接收。网络交换机被配置为基于确定的网络交换机内可用资源的不存在来选择性地改变在带宽预留消息中指定的所请求的服务质量。网络交换机根据确定的不存在可用资源，选择性地将所请求的质量服务增加到路由器将被拒绝的值。因此，网络交换机可以确保路由器不会从主计算机授予将导致网络交换机的容量被超过的带宽预留消息，而无需对主机或路由器进行任何修改，或者任何干扰 RFC 2205中规定的资源预留协议。

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