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1. 发明申请

WO2008010918A3 METHODS AND APPARATUS FOR IMPROVED DETERMINATION OF NETWORK METRICS 审中-公开
标题翻译：改进网络测量的方法和设备
公开(公告)号：WO2008010918A3
公开(公告)日：2008-03-27
申请号：PCT/US2007015506
申请日：2007-07-06
申请人： CISCO TECH INC , ALARIA VALENTINA , GAI SILVANO , EDSALL THOMAS , CHANDRASEKARAN VARAGUR V
发明人： ALARIA VALENTINA , GAI SILVANO , EDSALL THOMAS , CHANDRASEKARAN VARAGUR V
IPC分类号： G06F11/00
CPC分类号： H04L43/0864 , H04J3/0682 , H04L43/0858 , H04L43/106
摘要： A metric measurement mechanism is used to determine network characteristics such as latency and round trip time with more precision than that available from layer three metric measurement mechanisms. The metric measurement mechanism can use the same architecture used by layer three metric measurement mechanisms while more accurately measuring network latency and isolating network device processing delays.
摘要翻译：使用度量测量机制来确定诸如延迟和往返时间之类的网络特性，其精度高于三层度量测量机制可用的精度。度量测量机制可以使用与三层度量测量机制相同的架构，同时更准确地测量网络延迟并隔离网络设备处理延迟。

2. 发明申请

WO2005055497A3 APPARATUS AND METHOD FOR PERFORMING FAST FIBRE CHANNEL WRITE OPERATIONS OVER RELATIVELY HIGH LATENCY NETWORKS 审中-公开
标题翻译：用于执行相对较高时间网络的快速光纤通道写操作的装置和方法
公开(公告)号：WO2005055497A3
公开(公告)日：2006-09-14
申请号：PCT/US2004039904
申请日：2004-11-29
申请人： CISCO TECH INC , BASAVAIAH MURALI , AMBATI SATISH , IYENGAR MAGESH , EDSALL THOMAS , DUTT DINESH G , GAI SILVANO , CHANDRASEKARAN VARAGUR V
发明人： BASAVAIAH MURALI , AMBATI SATISH , IYENGAR MAGESH , EDSALL THOMAS , DUTT DINESH G , GAI SILVANO , CHANDRASEKARAN VARAGUR V
IPC分类号： H04Q7/24 , G06F3/06 , H04L20060101 , H04L12/26 , H04L29/08
CPC分类号： G06F3/0659 , G06F3/0613 , G06F3/0635 , G06F3/067 , H04L67/1097
摘要： A method and apparatus to improve the performance of a SCSI write over a high latency network (10). The apparatus includes a first Switch (SW1) close to the initiator in a first SAN (12) and a second Switch (SW2) close to the target in a second SAN (14). The target can also be either directly or indirectly connected to the second Switch in the second SAN. The first and second Switches then coordinate with one another by sending Transfer Ready commands to each other independent of the target's knowledge. The second switch buffers the data received from the Host until the target indicates it is ready to receive the data. Since the Switches send frames to the initiating Host independent of the target, the Switches manipulate the OX_ID and RX_ID fields in the Fibre Channel header of the various commands associated with the SCSI Write. The OX_ID and RX_ID fields are manipulated so as to trap the commands and so that the Switches can keep track of the various commands associated with the SCSI write.
摘要翻译：一种改善高延迟网络上SCSI写入性能的方法和装置（10）。该装置包括靠近第一SAN（12）中的启动器的第一开关（SW1）和靠近第二SAN（14）中的目标的第二开关（SW2）。目标也可以直接或间接地连接到第二个SAN中的第二个交换机。第一个和第二个交换机然后通过发送传输就绪命令相互协调，独立于目标的知识。第二个交换机缓存从主机接收的数据，直到目标指示它准备好接收数据。由于交换机将发送帧发送到独立于目标的发起主机，交换机将处理与SCSI写入相关联的各种命令的光纤通道报头中的OX_ID和RX_ID字段。操作OX_ID和RX_ID字段以捕获命令，以便交换机可以跟踪与SCSI写入相关联的各种命令。

3. 发明申请

WO2006047223A3 FORWARDING TABLE REDUCTION AND MULTIPATH NETWORK FORWARDING 审中-公开
标题翻译：转发表减少和多路径网络转发
公开(公告)号：WO2006047223A3
公开(公告)日：2006-12-21
申请号：PCT/US2005037765
申请日：2005-10-18
申请人： CISCO TECH INC , KREEGER LAWRENCE , EDSALL THOMAS , GANESAN ELANGO , GAI SILVANO
发明人： KREEGER LAWRENCE , EDSALL THOMAS , GANESAN ELANGO , GAI SILVANO
IPC分类号： H04L12/56
CPC分类号： H04L45/66 , H04L45/48 , H04L45/54 , H04L45/60 , H04L45/74 , H04L49/25 , H04L49/3009 , H04L49/351
摘要： Increased usage of network links is provided and smaller forwarding tables are required. A combination of STP and Multipath methods may be implemented in a network. Frames may be forwarded between switches not only according to MAC addresses, but also according to switch IDs and local IDs. Switch IDs do not need to be globally unique, but should be unique within a particular network. Local IDs need only be unique within a particular switch. Some preferred implementations allow frames to be delivered in order to devices requiring in-order delivery. Preferably, core switches need only learn the switch IDs of each core switch and each edge switch, and the appropriate exit port(s) corresponding to each switch. Preferably, the forwarding tables of each edge switch indicate the addresses of each device attached to that edge switch, the address of each device that is in communication with an attached device and the address of every other switch in the network.
摘要翻译：提供更多的网络链接使用，并且需要更小的转发表。 STP和多路径方法的组合可以在网络中实现。不仅可以根据MAC地址在交换机之间转发帧，还可以根据交换机ID和本地ID转发帧。交换机ID不必是全球唯一的，但在特定网络中应该是唯一的。本地ID只需在特定交换机中是唯一的。一些优选实施方式允许帧被传送以便需要按顺序传送的设备。优选地，核心交换机只需要知道每个核心交换机和每个边缘交换机的交换机ID，以及每个交换机对应的适当的出口端口。优选地，每个边缘交换机的转发表格指示附着到该边缘交换机的每个设备的地址，与附接设备通信的每个设备的地址以及网络中每个其他交换机的地址。

4. 发明申请

WO2006047109A3 ETHERNET EXTENSION FOR THE DATA CENTER 审中-公开
标题翻译：以太网扩展数据中心
公开(公告)号：WO2006047109A3
公开(公告)日：2006-11-23
申请号：PCT/US2005037069
申请日：2005-10-14
申请人： CISCO TECH INC , GAI SILVANO , EDSALL THOMAS , CAFIERO LUCA , BERGAMASCO DAVIDE , DUTT DINESH , BONOMI FLAVIO
发明人： GAI SILVANO , EDSALL THOMAS , CAFIERO LUCA , BERGAMASCO DAVIDE , DUTT DINESH , BONOMI FLAVIO
IPC分类号： H04J1/16 , G01R31/08 , G06F11/00 , G06F15/173 , G08C15/00 , H04J3/14 , H04L1/00 , H04L12/26
CPC分类号： H04L12/4633 , H04L12/4641 , H04L47/10 , H04L47/13 , H04L47/24 , H04L47/266 , H04L47/32 , H04L47/39 , H04L69/22
摘要： The present invention provides methods and devices for implementing a Low Latency Ethernet ("LLE") solution, also referred to herein as a Data Center Ethernet ("DCE") solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes ("VLs") in a single physical connection of a data center or similar network. Some VLs are "drop" VLs, with Ethernet-like behavior, and others are "no-drop" lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
摘要翻译：本发明提供了用于实现低延迟以太网（“LLE”）解决方案的方法和设备，该解决方案在本文中也称为数据中心以太网（“DCE”）解决方案，其简化了数据中心的连接性并提供了高带宽，低用于承载以太网和存储流量的延迟网络。本发明的一些方面涉及将FC帧变换成适于在以太网上传输的格式。本发明的一些优选实现在数据中心或类似网络的单个物理连接中实现多个虚拟通道（“VL”）。一些VL是“下降”VL，具有类似以太网的行为，而其他VL是具有类似FC的行为的“不丢弃”通道。本发明的一些优选实施方案提供了基于信用和VL的保证带宽。使用小帧缓冲区时，主动缓冲区管理可实现高可靠性和低延迟。优选地，用于主动缓冲器管理的规则对于丢弃和不丢弃VL是不同的。

5. 发明申请

WO2006057730A3 NETWORK DEVICE ARCHITECTURE FOR CONSOLIDATING INPUT/OUTPUT AND REDUCING LATENCY 审中-公开
标题翻译：用于整合输入/输出和减少延迟的网络设备架构
公开(公告)号：WO2006057730A3
公开(公告)日：2007-03-08
申请号：PCT/US2005037239
申请日：2005-10-13
申请人： CISCO TECH INC , GAI SILVANO , EDSALL THOMAS , BERGAMASCO DAVIDE , DUTT DINESH , BONOMI FLAVIO
发明人： GAI SILVANO , EDSALL THOMAS , BERGAMASCO DAVIDE , DUTT DINESH , BONOMI FLAVIO
IPC分类号： H04L12/28
CPC分类号： H04L47/10 , H04L12/413 , H04L47/32 , H04L47/33 , H04L47/39 , H04L49/90
摘要： The present invention provides methods and devices for implementing a Low Latency Ethernet ("LLE") solution, also referred to herein as a Data Center Ethernet ("DCE") solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes ("VLs") in a single physical connection of a data center or similar network. Some VLs are "drop" VLs (1505), with Ethernet-like behavior, and others are "no-drop" lanes (1510 )with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
摘要翻译：本发明提供了用于实现低延迟以太网（“LLE”）解决方案的方法和设备，这也被称为数据中心以太网（“DCE”）解决方案，其简化了数据中心的连接性并提供了高带宽，低用于承载以太网和存储流量的延迟网络。本发明的一些方面涉及将FC帧变换成适于在以太网上传输的格式。本发明的一些优选实现在数据中心或类似网络的单个物理连接中实现多个虚拟通道（“VL”）。一些VL是“drop”VL（1505），具有类似以太网的行为，而其他VL是类似FC的行为的“不丢弃”通道（1510）。本发明的一些优选实施方案提供了基于信用和VL的保证带宽。使用小帧缓冲区时，主动缓冲区管理可实现高可靠性和低延迟。优选地，用于主动缓冲器管理的规则对于丢弃和不丢弃VL是不同的。

6. 发明申请

WO2008048890A3 MULTI-CHASSIS EMULATED SWITCH 审中-公开
标题翻译：多层仿真开关
公开(公告)号：WO2008048890A3
公开(公告)日：2008-06-26
申请号：PCT/US2007081225
申请日：2007-10-12
申请人： CISCO TECH INC , SANE SANJAY , KREEGER LAWRENCE , EDSALL THOMAS , GANESAN ELANGO , HANG SOEI-SHIN , MELLACHERUVU RAMANA
发明人： SANE SANJAY , KREEGER LAWRENCE , EDSALL THOMAS , GANESAN ELANGO , HANG SOEI-SHIN , MELLACHERUVU RAMANA
IPC分类号： H04Q7/00
CPC分类号： H04L12/462 , H04L45/00 , H04L45/245 , H04L45/48 , H04L45/586 , H04L47/125 , H04L49/351 , H04L49/70
摘要： A solution is provided wherein the interfaces between multiple chassis (e.g., edge switches) in a network of layer 2 devices and a spanning tree device are treated as a single emulated switch. This emulated switch effectively enables two different views to the two different sides. Thus, frames from the network of layer 2 switches destined to any port of the emulated switch may take any of the links (through any of the physical switches), thereby enabling effective load-balancing for frames traveling from the layer 2 network side into the spanning tree device. Meanwhile the spanning tree device does not recognize an illegal loop in its connection to two different edge switches as it views the two links as a single logical EtherChannel.
摘要翻译：提供了一种解决方案，其中层2设备的网络中的多个机箱（例如，边缘交换机）与生成树设备之间的接口被视为单个仿真开关。该模拟开关有效地实现了两个不同的视图。因此，去往模拟交换机的任何端口的第二层交换机的网络的帧可以采用任何链路（通过任何物理交换机），从而使得从第2层网络侧行进到帧的帧能够进行有效的负载平衡生成树设备。同时，生成树设备在将两个链路视为单个逻辑以太通道时，不识别其连接到两个不同边缘交换机的非法回路。

7. 发明申请

WO2006138290A3 METHODS AND DEVICES FOR NETWORKING BLADE SERVERS 审中-公开
标题翻译：网络刀片服务器的方法和设备
公开(公告)号：WO2006138290A3
公开(公告)日：2009-05-07
申请号：PCT/US2006022957
申请日：2006-06-12
申请人： CISCO TECH INC , EDSALL THOMAS , DESANTI CLAUDIO
发明人： EDSALL THOMAS , DESANTI CLAUDIO
IPC分类号： G06F3/00
CPC分类号： H04L67/1006 , H04L49/253 , H04L49/357 , H04L49/45 , H04L49/552 , H04L67/1002 , H04L67/1034
摘要： Some embodiments of the present invention provide blade servers having blade switches that function as switches in the data plane, but do not have a Domain_ID. Control plane switching functions are performed by a fabric switch (e.g., a core switch) to which the blade server is attached. A fabric switch to which a blade switch is attached may perform address assignment functions for blades of the blade server. The blade switch preferably converts FLOGI requests to FDISC requests that are forwarded to an attached fabric switch. Some implementations provide for the multiple fabric switches, all of which are configured for communication with at least one blade switch, to establish and maintain the state of a virtual Domain_ID.
摘要翻译：本发明的一些实施例提供具有刀片式交换机的刀片服务器，该刀片交换机用作数据平面中的交换机，但不具有Domain_ID。控制平面切换功能由刀片服务器附接到的交换机（例如，核心交换机）执行。连接有刀片交换机的光纤交换机可以为刀片服务器的刀片执行地址分配功能。刀片式交换机优选地将FLOGI请求转换成FDISC请求，该FDISC请求被转发到连接的结构交换机。一些实施方案提供了多个结构交换机，所有这些交换机被配置为与至少一个刀片交换机通信，以建立和维护虚拟Domain_ID的状态。

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