公开(公告)号：US09509614B2

公开(公告)日：2016-11-29

申请号：US13923257

申请日：2013-06-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hendrikus G. P. Bosch ,  David Richard Barach ,  Michael E. Lipman ,  Alessandro Duminuco ,  James N. Guichard ,  Humberto J. La Roche

IPC: H04L12/803

CPC classification number: H04L47/125

Abstract: An example method for load balancing in a network environment is provided and includes receiving a packet from a first stage load-balancer in a network environment, where the packet is forwarded from the first stage load-balancer to one of a plurality of second stage load-balancers in the network according to a hash based forwarding scheme, and routing the packet from the second stage load-balancer to one of a plurality of servers in the network according to a per-session routing scheme. The per-session routing scheme includes retrieving a session routing state from a distributed hash table in the network. In a specific embodiment, the hash based forwarding scheme includes equal cost multi path routing. The session routing state can include an association between a next hop for the packet and the packet's 5-tuple representing a session to which the packet belongs.

Abstract translation: 提供了一种用于在网络环境中进行负载平衡的示例性方法，并且包括在网络环境中从第一级负载平衡器接收分组，其中分组从第一级负载平衡器转发到多个第二级负载 根据基于散列的转发方案的网络中的平衡器，并且根据每会话路由方案将分组从第二阶段负载平衡器路由到网络中的多个服务器之一。 每会话路由方案包括从网络中的分布式哈希表检索会话路由状态。 在具体实施例中，基于散列的转发方案包括相同成本的多路径路由。 会话路由状态可以包括分组的下一跳与分组所属的会话的分组的5元组之间的关联。

公开(公告)号：US09413655B2

公开(公告)日：2016-08-09

申请号：US14304043

申请日：2014-06-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Kevin D. Shatzkamer ,  James N. Guichard ,  Hendrikus G. P. Bosch ,  Alessandro Duminuco ,  Humberto J. La Roche ,  Jeffrey Napper

IPC: H04L12/741 ,  H04L12/721 ,  H04L12/851 ,  H04L12/725

CPC classification number: H04L45/74 ,  H04L45/306 ,  H04L45/38 ,  H04L47/2441 ,  H04L47/2483

Abstract: A method provided in one embodiment includes receiving a first data packet of a data flow at a first classifier in which the first data packet includes a first identifier. The method further includes determining a second classifier associated with the first identifier in which the second classifier is further associated with at least one service chain of a service chain environment. The method still further includes forwarding the first data packet to the second classifier. The second classifier is configured to receive the first data packet, determine a particular service chain of the at least one service chain to which the first data packet is to be forwarded, and forward the first data packet to the particular service chain.

Abstract translation: 在一个实施例中提供的方法包括在第一分类器处接收数据流的第一数据分组，其中第一数据分组包括第一标识符。 该方法还包括确定与第一标识符相关联的第二分类器，其中第二分类器进一步与服务链环境的至少一个服务链相关联。 该方法还包括将第一数据分组转发到第二分类器。 第二分类器被配置为接收第一数据分组，确定要转发第一数据分组的至少一个服务链的特定服务链，并将第一数据分组转发到特定服务链。

公开(公告)号：US09363183B2

公开(公告)日：2016-06-07

申请号：US14249636

申请日：2014-04-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Surendra M. Kumar ,  Paul Quinn ,  James N. Guichard ,  Michael R. Smith

IPC: H04L12/803 ,  H04L29/12 ,  H04L12/851 ,  H04L12/54 ,  H04L12/28

CPC classification number: H04L47/125 ,  H04L12/28 ,  H04L12/56 ,  H04L47/2483 ,  H04L61/2514

Abstract: An example method for network address translation (NAT) offload to network infrastructure for service chains in a network environment is provided and includes receiving a packet at a network infrastructure in a network comprising a plurality of service nodes interconnected through the network infrastructure, each service node executing at least one service function, identifying the packet as belonging to a first flow based on a cookie in a network service header of the packet that indicates a service chain that includes a sequence of service functions to be executed on the packet at the service nodes, determining that a service function in the service chain is to be offloaded from one of the service nodes to the network infrastructure for subsequent packets of the first flow, and executing the offloaded service function at the network infrastructure for subsequent packets of the first flow.

Abstract translation: 提供了一种用于网络地址转换（NAT）卸载到网络环境中的服务链的网络基础设施的示例性方法，并且包括在网络中的网络基础设施处接收包括通过网络基础设施互连的多个服务节点的分组，每个服务节点 执行至少一个服务功能，基于所述分组的网络服务报头中的cookie来将分组标识为属于第一流的分组，其指示服务链，所述服务链包括将在所述服务节点处对所述分组执行的服务功能序列 确定所述服务链中的服务功能将从所述服务节点之一卸载到所述网络基础设施以用于所述第一流的后续分组，以及在所述网络基础设施处执行所述卸载的服务功能以用于所述第一流的后续分组。

公开(公告)号：US09344337B2

公开(公告)日：2016-05-17

申请号：US14208453

申请日：2014-03-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Surendra M. Kumar ,  Nagaraj A. Bagepalli ,  Abhijit Patra ,  Paul Quinn ,  James N. Guichard ,  Hendrikus G. P. Bosch

IPC: H04L12/28 ,  H04L12/24 ,  H04L12/725 ,  H04L12/751

CPC classification number: H04L45/02 ,  H04L41/08 ,  H04L41/0813 ,  H04L41/0893 ,  H04L41/0896 ,  H04L41/12 ,  H04L45/308 ,  H04L45/38

Abstract: An example method for service node originated service chains in a network environment is provided and includes receiving a packet at a service node in a network environment that includes a plurality of service nodes and a central classifier, analyzing the packet for a service chain modification or a service chain initiation, classifying the packet at the service node to a new service chain based on the analysis, initiating the new service chain at the service node if the analysis indicates service chain initiation, and modifying an existing service chain for the packet to the new service chain if the analysis indicates service chain modification. In specific embodiments, the analysis includes applying classification logic specific to the service node. Some embodiments, service node attributes and order of service nodes in substantially all service chains configured in the network may be received from a central controller.

Abstract translation: 提供了一种网络环境中服务节点发起的服务链的示例方法，包括在包括多个服务节点和中心分类器的网络环境中的服务节点处接收分组，分析服务链修改的分组或 服务链启动，基于分析将服务节点处的分组分类到新的服务链，如果分析指示服务链启动，则在服务节点处启动新的服务链，并将分组的现有服务链修改为新的 服务链如果分析表明服务链修改。 在具体实施例中，分析包括应用对服务节点特定的分类逻辑。 可以从中央控制器接收一些实施例，服务节点属性和在网络中配置的基本上所有服务链中的服务节点的顺序。

公开(公告)号：US20150172170A1

公开(公告)日：2015-06-18

申请号：US14108994

申请日：2013-12-17

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hendrikus G.P. Bosch ,  James N. Guichard ,  David D. Ward ,  Alessandro Duminuco ,  Rex E. Fernando ,  Paul Quinn

IPC: H04L12/733

CPC classification number: H04L45/20 ,  H04L45/04 ,  H04L45/24 ,  H04L45/28 ,  H04L45/586

Abstract: An example method is provided in one example embodiment and includes receiving a packet of a session from a previous hop router at a service zone of a service chain; recording the previous hop router for the session; determining an appliance to service the packet in the service zone using load balancing; recording an appliance identity for servicing the session in the service zone; determining a next hop router in the service chain for the packet using load balancing; and recording the next hop router for the session.

Abstract translation: 在一个示例实施例中提供了示例性方法，并且包括从服务链的服务区的前一跳路由器接收会话的分组; 记录会话的上一跳路由器; 确定使用负载平衡来服务所述服务区中的分组的设备; 记录在服务区域中为会话服务的设备身份; 使用负载平衡确定所述分组的服务链中的下一跳路由器; 并为会话记录下一跳路由器。