公开(公告)号：US20060140130A1

公开(公告)日：2006-06-29

申请号：US11289366

申请日：2005-11-30

申请人： Mohan Kalkunte ,  Venkateshwar Buduma ,  Puneet Agarwal ,  Gurumurthy Yelewarapu ,  Song-Huo Yu

发明人： Mohan Kalkunte ,  Venkateshwar Buduma ,  Puneet Agarwal ,  Gurumurthy Yelewarapu ,  Song-Huo Yu

IPC分类号： H04L12/56 ,  H04L12/26 ,  H04L12/28 ,  H04J1/16

CPC分类号： H04L43/00 ,  H04L12/4641 ,  H04L49/208 ,  H04L49/3009 ,  H04L49/352 ,  H04L49/602

摘要： A network device for implementing mirroring on packets. The network device includes a plurality of ports, each of which is at least one of an ingress port, an egress port and a mirror-to port. The network device also includes processing means for supporting a plurality of mirroring types. Each of the ingress port, egress port and mirror-to port includes at least one register for supporting the plurality of mirroring types. To support mirroring at each of the ingress port, egress port and mirror-to port predefined bits in the at least one register are set. When an incoming packet is received, the predefined bits are examined to determine which of the plurality of mirroring types to apply to the packet.

摘要翻译： 一种用于实现数据包镜像的网络设备。 网络设备包括多个端口，每个端口是入端口，出端口和镜对端口中的至少一个。 网络设备还包括用于支持多种镜像类型的处理装置。 入口端口，出端口和镜对端口中的每一个包括至少一个用于支持多个镜像类型的寄存器。 为了支持每个入口端口的镜像，设置至少一个寄存器中的出口端口和镜像端口预定义位。 当接收到传入的分组时，检查预定义的比特以确定应用于分组的多个镜像类型中的哪一个。

公开(公告)号：US20060114901A1

公开(公告)日：2006-06-01

申请号：US11289497

申请日：2005-11-30

申请人： Mohan Kalkunte ,  John Dull ,  Bruce Kwan ,  Venkateshwar Buduma

发明人： Mohan Kalkunte ,  John Dull ,  Bruce Kwan ,  Venkateshwar Buduma

IPC分类号： H04L12/56

CPC分类号： H04L49/602 ,  H04L49/103 ,  H04L49/254 ,  H04L49/3009 ,  H04L49/3072 ,  H04L49/352

摘要： A network device for selecting a port from a trunk group to transmit a unicast packet on the selected port. The network device includes at least one trunk group including a plurality of physical ports. The network device also includes a table with a plurality of entries. Each entry is associated with one trunk group and includes a plurality of fields that are associated with ports in the trunk group. Each entry also includes a hash field that is used to select bits from predefined fields of an incoming unicast packet to obtain an index bit for accessing one of the plurality of fields. The network device further includes transmitting means for transmitting the unicast packet to a port associated with an accessed one of the plurality of fields.

摘要翻译： 一种用于从中继组中选择端口以在所选端口上传输单播分组的网络设备。 网络设备包括至少一个包括多个物理端口的中继线群组。 网络设备还包括具有多个条目的表。 每个条目与一个中继线组相关联，并且包括与中继线群组中的端口相关联的多个字段。 每个条目还包括哈希字段，其用于从输入单播数据包的预定义字段中选择位以获得用于访问多个字段之一的索引位。 网络设备还包括用于将单播分组发送到与所访问的多个字段中的一个相关联的端口的发送装置。

公开(公告)号：US06671279B1

公开(公告)日：2003-12-30

申请号：US09257075

申请日：1999-02-24

申请人： Jim Mangin ,  Mohan Kalkunte ,  Derek Pitcher

发明人： Jim Mangin ,  Mohan Kalkunte ,  Derek Pitcher

IPC分类号： H04L1228

CPC分类号： H04L12/5601 ,  H04L2012/5669

摘要： A technique for establishing a shortcut Virtual Channel Connection (VCC) in a Multi-Protocol Over ATM (MPOA) system detects a packet flow, and then determines whether to establish the shortcut VCC based upon an expected MPOA server response time. Specifically, an expected MPOA server response time is determined based upon an MPOA server response time history. The expected MPOA server response time is then compared to a predetermined MPOA server response time threshold to determine whether the expected MPOA server response time is within the predetermined MPOA server response time threshold. The shortcut VCC is established if the expected MPOA server response time is within the predetermined MPOA server response time threshold. Upon establishing the shortcut VCC, the MPOA server response time history is updated to reflect an actual MPOA server response time incurred when establishing the shortcut VCC.

摘要翻译： 在ATM多协议（MPOA）系统中建立快捷虚拟通道连接（VCC）的技术检测分组流，然后基于预期的MPOA服务器响应时间来确定是否建立快捷方式VCC。 具体地，基于MPOA服务器响应时间历史确定预期的MPOA服务器响应时间。 然后将预期的MPOA服务器响应时间与预定的MPOA服务器响应时间阈值进行比较，以确定预期的MPOA服务器响应时间是否在预定的MPOA服务器响应时间阈值内。 如果预期的MPOA服务器响应时间在预定的MPOA服务器响应时间阈值内，则建立快捷方式VCC。 建立快捷方式VCC后，更新MPOA服务器响应时间历史，以反映建立快捷方式VCC时产生的实际MPOA服务器响应时间。

公开(公告)号：US06535510B2

公开(公告)日：2003-03-18

申请号：US09883212

申请日：2001-06-19

申请人： Mohan Kalkunte ,  Srinivas Sampath ,  Daniel Tai ,  Soma Pullela ,  Kevin Cameron

发明人： Mohan Kalkunte ,  Srinivas Sampath ,  Daniel Tai ,  Soma Pullela ,  Kevin Cameron

IPC分类号： H04L1256

CPC分类号： H04L12/5601 ,  H04L12/18 ,  H04L12/1881 ,  H04L45/00 ,  H04L45/245 ,  H04L45/54 ,  H04L45/745 ,  H04L47/10 ,  H04L47/2408 ,  H04L47/2425 ,  H04L47/2441 ,  H04L47/245 ,  H04L47/286 ,  H04L47/30 ,  H04L47/32 ,  H04L47/6205 ,  H04L47/6215 ,  H04L47/6225 ,  H04L49/101 ,  H04L49/201 ,  H04L49/203 ,  H04L49/205 ,  H04L49/25 ,  H04L49/254 ,  H04L49/30 ,  H04L49/309 ,  H04L49/352 ,  H04L49/608 ,  H04L49/90 ,  H04L49/901 ,  H04L49/9094 ,  H04L2012/5651 ,  H04L2012/5665 ,  H04L2012/5679 ,  H04L2012/5681 ,  H04L2012/5683 ,  Y02D50/30

摘要： A method of forwarding data in a network switch fabric is disclosed. An incoming data packet is received at a first port of the fabric and a first packet portion, less than a full packet length, is read to determine particular packet information, the particular packet information including a source address and a destination address. An egress port bitmap is determined based on a lookup in a forwarding table and it is determined if the destination address belongs to a trunk group of trunked ports. The incoming data packet is forwarded based on the egress port bitmap, when the destination address does not belong to the trunk group. When the destination address does belong to the trunk group, a particular trunked port of the trunk group is determined and the incoming data packet is forwarded thereto. More specifically, the particular trunked port of the trunk group may be determined by calculating a hash value based on the source address and the destination value and selecting the particular trunked port based on the hash value. Additionally, a class of service for the incoming data packet is also determined from the particular packet information and a priority for forwarding is set based on the class of service.

公开(公告)号：US06470016B1

公开(公告)日：2002-10-22

申请号：US09248155

申请日：1999-02-09

申请人： Mohan Kalkunte ,  Jim Mangin

发明人： Mohan Kalkunte ,  Jim Mangin

IPC分类号： H04L1228

CPC分类号： H04L47/29 ,  H04L47/2433 ,  H04L47/30 ,  H04L47/50 ,  H04L47/522 ,  H04L47/525 ,  H04L47/6215 ,  H04L47/6225 ,  H04L47/623 ,  H04L47/6255

摘要： An adaptive weighted round robin scheduling apparatus and method schedules variable-length frame transmissions from a plurality of output queue having different transmission priorities by first allocating, for each queue, a number of bandwidth segments for a bandwidth cycle and a number of transmission opportunities for a round robin cycle, and then processing the queues consecutively in a round-robin fashion, beginning with a highest priority queue, until none of the queues has any bandwidth remaining. More specifically, during each iteration of a round robin cycle, a queue is permitted to transmit a frame if the queue has at least one remaining transmission opportunity, the queue has a frame ready for transmission, and the queue has at least one remaining bandwidth segment, and furthermore the number of transmission opportunities for the queue is decremented by at least one. Upon transmitting a frame, the number of bandwidth segments for the queue is decreased by the number of bandwidth segments in the frame. If a queue has no frame ready for transmission, then the queue may be either penalized, in which case the number of bandwidth segments for the queue is reduced, or forced to forfeit its bandwidth segments, in which case any remaining bandwidth segments are reallocated to other queues and the number of bandwidth segments and the number of transmission opportunities for the queue are set to zero.

摘要翻译： 自适应加权轮询调度装置和方法通过首先为每个队列分配用于带宽周期的带宽段的数量和针对一个带宽周期的传输机会的数量来分配来自具有不同传输优先级的多个输出队列的可变长度帧传输 循环循环，然后以循环方式连续处理队列，从最高优先级队列开始，直到任何队列都没有任何带宽剩余。 更具体地，在循环循环的每次迭代期间，如果队列具有至少一个剩余传输机会，则允许队列发送帧，该队列具有准备好进行传输的帧，并且该队列具有至少一个剩余带宽段 ，此外，队列的传输机会数减少至少一个。 在发送帧时，队列中的带宽段的数量减少了帧中带宽段的数量。 如果队列没有准备传输的帧，则队列可能被惩罚，在这种情况下，队列的带宽段数量被减少，或被迫丢弃其带宽段，在这种情况下，任何剩余带宽段被重新分配到 其他队列和带宽段的数量和队列的传输机会数量设置为零。

公开(公告)号：US6055578A

公开(公告)日：2000-04-25

申请号：US872017

申请日：1997-06-09

申请人： Robert Alan Williams ,  Mohan Kalkunte

发明人： Robert Alan Williams ,  Mohan Kalkunte

IPC分类号： H04L12/413 ,  H04L12/44 ,  G06F13/00

CPC分类号： H04L12/413 ,  H04L12/44

摘要： Delay times are modified in an Ethernet network device having captured the media channel by increasing the interframe spacing (IFS) between data packets. The modified IFS interval, increased by adding a delay interval to the minimum interpacket gap (IPG) interval after a first user-selectable number of consecutive successful transmissions, enables other network stations to transmit data during the deferral interval. The Ethernet network device maintains the modified IFS for a limited deferral interval, based upon a predetermined time interval, a number of successful transmissions by other network stations, or a second user-selectable number of consecutive successful transmissions. Additional delay intervals may be added if the network station continues to exceed the predetermined number of consecutive successful transmissions. Burst transmission can also be optimized by counting the consecutive successful transmissions only after detecting an attempted transmission by another network station. Hence, a network station can avoid capturing a network channel while ensuring access latencies.

摘要翻译： 在已经通过增加数据分组之间的帧间间隔（IFS）捕获媒体信道的以太网网络设备中修改延迟时间。 通过在第一用户可选数量的连续成功传输之后将延迟间隔添加到最小间隔间隔（IPG）间隔而增加的经修改的IFS间隔使其他网络站能够在延迟间隔期间传送数据。 以太网网络设备基于预定时间间隔，其他网络站的成功传输次数或第二用户可选数量的连续成功传输，维持修改后的IFS的有限延迟间隔。 如果网络站继续超过预定数量的连续成功传输，则可以添加额外的延迟间隔。 也可以通过仅在检测到另一网络站的尝试传输之后对连续的成功传输进行计数来优化突发传输。 因此，网络站可以避免在确保接入延迟的同时捕获网络信道。

公开(公告)号：US5854900A

公开(公告)日：1998-12-29

申请号：US656491

申请日：1996-05-31

申请人： Mohan Kalkunte ,  Jim Mangin

发明人： Mohan Kalkunte ,  Jim Mangin

IPC分类号： H04L12/413

CPC分类号： H04L12/413

摘要： Delay times are modified in Ethernet network devices by adding a slot time to the minimum interpacket gap (IPG) interval between uninterrupted consecutive transmissions by a network station. If a network station transmits a data packet and has another data packet to send, modified delay time prevents the station from contending for access of the media, enabling other stations having data to transmit to attempt access on the media. If a collision occurs during the transmission of a second successive data packet, the network station uses a modified collision arbitration and automatically sets the collision delay interval to zero for the first access attempt. If another collision occurs during the access attempt, the collision interval is calculated according to the truncated binary exponential backoff algorithm.

摘要翻译： 通过将时隙时间添加到网络站的不间断连续传输之间的最小间隔间隔（IPG）间隔，在以太网网络设备中修改延迟时间。 如果网络台发送数据分组并发送另一个数据分组，则修改的延迟时间将阻止该台站争夺媒体的访问，使能够传送数据的其他台站试图访问媒体。 如果在传送第二连续数据分组期间发生冲突，则网络站使用经修改的冲突仲裁，并且对于第一次访问尝试自动将冲突延迟间隔设置为零。 如果在访问尝试期间发生另一次冲突，则根据截断的二进制指数退避算法计算冲突间隔。

公开(公告)号：US5822538A

公开(公告)日：1998-10-13

申请号：US752884

申请日：1996-11-20

申请人： Gopal Krishna ,  Mohan Kalkunte ,  Robert Alan Williams

发明人： Gopal Krishna ,  Mohan Kalkunte ,  Robert Alan Williams

IPC分类号： G06F13/38 ,  G06F13/00

CPC分类号： G06F13/385

摘要： Collision delay intervals are modified in Ethernet network devices by transmitting priority data requiring a guaranteed latency by determining an integer multiple number of slot times, randomly selected from a predetermined range of integers, where the range of integers is independent from the number of access attempts. A network device having priority data for transmission randomly selects a collision delay interval to be either zero or one slot time for a predetermined number of access attempts. If the number of collisions encountered by the network station exceeds the predetermined number, the integer is selected from a range of integers calculated from a shifted exponential number of the access attempts, resulting in a smaller range than used for normal priority traffic. Use of the collision mediation for high priority traffic on a half-duplex Ethernet network provides a bounded access latency for real-time and multimedia applications by granting the network device a higher probability of successfully accessing the network media.

摘要翻译： 通过从整数的预定范围中随机选择的整数倍数的时隙时间，通过发送需要保证延迟的优先级数据来修改冲突延迟间隔，其中整数范围独立于接入尝试次数。 具有用于传输的优先级数据的网络设备在预定次数的访问尝试中随机选择冲突延迟间隔为零或一个时隙时间。 如果网络站遇到的冲突次数超过预定数量，则从从访问尝试的移位指数中计算出的整数范围中选择整数，导致比普通优先级流量使用的范围更小的范围。 在半双工以太网上使用冲突中介来实现高优先级流量，通过授予网络设备成功访问网络媒体的更高可能性，为实时和多媒体应用提供有界访问延迟。

公开(公告)号：US09166927B2

公开(公告)日：2015-10-20

申请号：US12255488

申请日：2008-10-21

申请人： Ariel Hendel ,  Bruce Kwan ,  Puneet Agarwal ,  Mohan Kalkunte

发明人： Ariel Hendel ,  Bruce Kwan ,  Puneet Agarwal ,  Mohan Kalkunte

IPC分类号： H04L12/933 ,  H04L12/715 ,  H04L12/713 ,  H04L12/931 ,  H04L12/939 ,  H04L12/46

CPC分类号： H04L49/1515 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/586 ,  H04L49/505 ,  H04L49/552

摘要： Methods and apparatus for communicating data traffic using switch fabric dispersion are disclosed. An example apparatus includes a first tier of switch elements; and a second tier of switch elements operationally coupled with the first tier of switch elements. In the example apparatus, the first tier of switch elements is configured to receive a data packet from a source. The first tier of switch elements is also configured to route the data packet to the second tier of switch elements in accordance with a dispersion function, where the dispersion function is based on a dispersion tag associated with the data packet. The first tier of switch elements is still further configured to transmit the data packet to a destination for the data packet after receiving it from the second tier of switch elements.

摘要翻译： 公开了使用交换矩阵色散来传送数据业务的方法和装置。 示例性装置包括第一层开关元件; 以及与第一层开关元件可操作地耦合的第二层开关元件。 在示例性装置中，第一层交换元件被配置为从源接收数据分组。 第一层交换单元还被配置为根据色散函数将数据分组路由到第二层交换单元，其中色散函数基于与数据分组相关联的色散标签。 第一层交换机元件还被配置为在从第二层交换机元件接收数据分组之后将数据分组发送到数据分组的目的地。

公开(公告)号：US08804503B2

公开(公告)日：2014-08-12

申请号：US11934196

申请日：2007-11-02

申请人： Mohan Kalkunte ,  Bruce Kwan

发明人： Mohan Kalkunte ,  Bruce Kwan

IPC分类号： H04J3/16 ,  H04L12/56 ,  H04L5/00

CPC分类号： H04L47/10 ,  H04L5/0053 ,  H04L47/11 ,  H04L47/12 ,  H04L47/2408 ,  H04L47/2416 ,  H04L47/2441 ,  H04L47/263 ,  H04L47/6215 ,  H04L49/25 ,  H04L49/50 ,  Y02D50/10

摘要： A network switch includes a plurality of egress ports configured to send packets of data traffic to at least one receiving network device and a plurality of ingress ports configured to receive the packets of data traffic from at least one sending network device. The switch further includes a switch logic engine configured to define multiple flows of data through the switch from a sending network device to a receiving network device and to route the flows from the ingress port to the egress port, a flow monitor configured to measure at least one flow attribute of the flows, and a flow regulation engine configured to regulate a flow rate of flows sent by a sending network device based at least in part on a measurement by the flow monitor of the at least one flow attribute of the packets.

摘要翻译： 网络交换机包括被配置为将数据流量分组发送到至少一个接收网络设备的多个出口端口和被配置为从至少一个发送网络设备接收数据流量分组的多个入口端口。 交换机还包括交换机逻辑引擎，其被配置为通过交换机定义从发送网络设备到接收网络设备的多条数据流，并且将流从入口端口路由到出口端口;流量监控器，被配置为至少测量 所述流的一个流属性和流调节引擎被配置为至少部分地基于所述流监视器对所述分组的所述至少一个流属性的测量来调节由发送网络设备发送的流的流速。