公开(公告)号：US09356884B2

公开(公告)日：2016-05-31

申请号：US13744137

申请日：2013-01-17

Applicant: Cisco Technology, Inc.

Inventor： Pags Krishnamoorthy ,  Rajagopalan Janakiraman ,  Chia Alex Tsai ,  Vinay Parameswarannair

IPC: H04L29/06 ,  H04L12/66 ,  H04L12/933

CPC classification number: H04L45/02 ,  H04L45/26 ,  H04L45/583 ,  H04L45/64 ,  H04L49/15 ,  H04L67/10

Abstract: In one embodiment, a copy of an original packet of a traffic flow is created at an ingress leaf node of a cloud switch. The ingress leaf node forwards the original packet along a less-specific path through the cloud switch, the less-specific path based on a domain index of an egress domain for the original packet. The copy of the original packet is modified to create a more specific path learn request packet. The ingress leaf node forwards the more specific path learn request packet along the less-specific path through the cloud switch. The ingress leaf node received back a more specific path learn request reply packet that includes an indication of a fabric system port. The ingress leaf node then programs a forwarding table based on the indication of the fabric system port, to have subsequent packets of the traffic flow forwarded along a more-specific path.

Abstract translation: 在一个实施例中，在云交换机的入口叶节点处创建业务流的原始分组的副本。 入口叶节点通过云交换机沿较不具体的路径转发原始数据包，该原始数据包是基于原始数据包的出口域的域索引的较不具体的路径。 修改原始数据包的副本以创建更具体的路径学习请求数据包。 入口叶节点通过云交换机沿较不具体的路径转发更具体的路径学习请求分组。 入口叶节点接收到更特定的路径学习请求应答分组，其包括结构系统端口的指示。 因此，入口叶节点基于结构系统端口的指示对转发表进行编程，以使业务流的后续分组沿着更具体的路径转发。

公开(公告)号：US09049127B2

公开(公告)日：2015-06-02

申请号：US13793148

申请日：2013-03-11

Applicant: Cisco Technology, Inc.

Inventor： Rajagopalan Janakiraman ,  Pags Krishnamoorthy ,  Sridhar Subramanian ,  Venkataraman Natham

IPC: H04L12/803 ,  H04L12/801 ,  H04L12/721 ,  H04L29/08

CPC classification number: H04L47/10 ,  H04L45/38 ,  H04L45/66 ,  H04L47/125 ,  H04L67/1023

Abstract: The methods and devices discussed herein provide service clustering within a TRILL network without relying on an additional service insertion framework. A TRILL network can include one or more flow distribution RBridges for distributing flows to service nodes. Each flow distribution RBridge can have a virtual base identifier and one or more virtual cluster identifiers. An example method can include maintaining N service cluster load balancing structures and receiving a packet that is encapsulated with an inner header (source/destination addresses) and an outer header (ingress/egress RBridge identifiers). The method can include determining whether the egress RBridge identifier is a virtual cluster identifier, and if so, applying a hash function to a predetermined flow tuple and selecting a service node associated with the hash value from one of the N service cluster load balancing structures. The method can include forwarding the packet to the selected service node.

Abstract translation: 本文讨论的方法和设备提供TRILL网络内的服务集群，而不依赖于附加的服务插入框架。 TRILL网络可以包括用于将流分发到服务节点的一个或多个流分配RBridge。 每个流分布RBridge可以具有虚拟基本标识符和一个或多个虚拟集群标识符。 示例性方法可以包括维护N个服务集群负载平衡结构并且接收用内部报头（源/目标地址）和外部报头（入口/出口RBridge标识符）封装的分组。 该方法可以包括确定出口RBridge标识符是否是虚拟集群标识符，如果是，则将散列函数应用于预定流元组，并从N个业务集群负载平衡结构之一中选择与该散列值相关联的业务节点。 该方法可以包括将分组转发到所选择的服务节点。

公开(公告)号：US20140269329A1

公开(公告)日：2014-09-18

申请号：US13839159

申请日：2013-03-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Sanjay Kumar Hooda ,  Rajagopalan Janakiraman ,  Vinay Parameswarannair ,  Vijay Sampath

IPC: H04L12/801

CPC classification number: H04L47/12 ,  H04L45/66 ,  H04L49/70

Abstract: Embodiments provide techniques for optimizing paths in a network environment with a virtual network device that includes a first physical network device and a second physical network device, connected using a virtual network device layer link. Embodiments receive a first data packet belonging to a first data flow, at the first physical network device, from the second physical network device, over the virtual network device layer link. An adjacent network device from which the second physical network device received the first data packet is determined. Embodiments also determine one or more links connecting the first physical network device and the adjacent network device. A network message is transmitted to the adjacent network device, where the adjacent network device is configured to transmit subsequent data packets from the first data flow to the virtual network device, using only the determined one or more links, responsive to receiving the network message.

Abstract translation: 实施例提供了利用包括使用虚拟网络设备层链路连接的第一物理网络设备和第二物理网络设备的虚拟网络设备来优化网络环境中的路径的技术。 实施例通过虚拟网络设备层链路从第二物理网络设备接收属于第一物理网络设备的第一数据流的第一数据包。 确定第二物理网络设备从其接收到第一数据分组的相邻网络设备。 实施例还确定连接第一物理网络设备和相邻网络设备的一个或多个链路。 将网络消息发送到相邻网络设备，其中相邻网络设备被配置为仅响应于接收到该网络消息而使用所确定的一个或多个链路，将后续数据分组从第一数据流发送到虚拟网络设备。