公开(公告)号：US20140169376A1

公开(公告)日：2014-06-19

申请号：US14185636

申请日：2014-02-20

Applicant: Cisco Technology, Inc.

Inventor： Ali Sajassi ,  Norman Finn ,  Francois Tallet

IPC: H04L12/741

CPC classification number: H04L45/745 ,  H04L1/00 ,  H04L12/462 ,  H04L12/4641 ,  H04L45/18

Abstract: A technique is provided for mitigating loops in Ethernet networks. A first port in an Ethernet device receives an Ethernet frame. The frame includes a source identifier, a destination identifier, and a Virtual Local Area Network Identifier (VLAN ID). According to various embodiments, the VLAN ID (VID) has the encoding of both a community group as well as a source bridge ID. A VID database is accessed using the destination identifier and the VID to determine whether the first port has ingress enabled. A filtering database is accessed to determine an egress port for forwarding the Ethernet frame.

Abstract translation: 提供了一种减轻以太网网络环路的技术。 以太网设备中的第一个端口接收以太网帧。 该帧包括源标识符，目的地标识符和虚拟局域网标识符（VLAN ID）。 根据各种实施例，VLAN ID（VID）具有社区组以及源网桥ID的编码。 使用目标标识符和VID访问VID数据库，以确定第一个端口是否启用了入口。 访问过滤数据库以确定用于转发以太网帧的出口端口。

公开(公告)号：US20140344426A1

公开(公告)日：2014-11-20

申请号：US14449923

申请日：2014-08-01

Applicant: Cisco Technology, Inc.

Inventor： Chiajen Tsai ,  Norman Finn ,  Yibin Yang ,  Nagabhushan K. Channabasappa ,  Debashis Patnala Rao

IPC: H04L12/24

CPC classification number: H04L41/0816 ,  H04L12/4687 ,  H04L12/4695 ,  H04L41/12 ,  H04L45/66

Abstract: In one embodiment, a method includes detecting a change in network topology and broadcasting a transient unconditional unpruning message to multiple nodes in the network. The message is configured to instruct each of the nodes receiving the message to start a phase timer in response to the broadcast message; unprune its operational ports; and, upon expiration of the phase timer, prune its ports in accordance with the results of a pruning protocol.

Abstract translation: 在一个实施例中，一种方法包括检测网络拓扑的变化并且向网络中的多个节点广播瞬时无条件的去运行消息。 消息被配置为响应于广播消息指示接收消息的每个节点开始相位定时器; 解除其运营端口; 并且在相位计时器到期后，根据修剪协议的结果修剪其端口。

公开(公告)号：US20140280838A1

公开(公告)日：2014-09-18

申请号：US13844249

申请日：2013-03-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Norman Finn ,  Bhushan Kanekar ,  Ed Warnicke

IPC: H04L29/08

CPC classification number: H04L67/327 ,  H04L45/38 ,  H04L49/00

Abstract: A user application may provide a hint which may be used by a compute device to select a tag to be inserted into the packets generated by the user application. Upon some event, the application transmits a hint associated with a network flow generated by the user application to a stack associated with the computing device. One of the layers of the stack—e.g., the operating system in the computing device—may include a hint database that contains rules for selecting tags using a received hint as input. The layer may then insert the tag into one or more packets of the network flow. When processing the packet, network devices in the SDN enabled network recognize the tag and perform an action corresponding to the tag.

Abstract translation: 用户应用可以提供可由计算设备使用的提示来选择要插入到由用户应用生成的分组中的标签。 在一些事件中，应用程序将与由用户应用程序生成的网络流相关联的提示发送到与计算设备相关联的堆栈。 堆栈的层之一（例如计算设备中的操作系统）可以包括提示数据库，其包含使用接收的提示作为输入来选择标签的规则。 然后该层可以将该标签插入网络流的一个或多个分组中。 处理数据包时，启用SDN的网络中的网络设备会识别该标签并执行与该标签相对应的操作。