公开(公告)号：US20150194215A1

公开(公告)日：2015-07-09

申请号：US14151730

申请日：2014-01-09

Applicant: NETRONOME SYSTEMS, INC.

Inventor： Gareth R. Douglas ,  Ciaran J. Toal ,  Sandra Scott-Hayward

IPC: G11C15/04 ,  G06F13/40

CPC classification number: G11C15/04 ,  G06F13/4022 ,  G06F2213/0026 ,  H04L12/462 ,  H04L45/38 ,  H04L45/7453 ,  H04L45/7457 ,  H04L47/21

Abstract: A first packet of a flow received onto an OpenFlow switch causes a flow entry to be added to a flow table, but the associated action is to perform a TCAM lookup. A request is sent to an OpenFlow controller. A response OpenFlow message indicates an action. The response passes through a special dedicated egress fast-path such that the action is applied and the first packet is injected into the main data output path of the switch. A TCAM entry is also added that indicates the action. A second packet of the flow is then received and a flow table lookup causes a TCAM lookup, which indicates the action. The action is applied to the second packet, the packet is output from the switch, and the lookup table is updated so the flow entry will thereafter directly indicate the action. Subsequent packets of the flow do not involve TCAM lookups.

Abstract translation: 接收到OpenFlow交换机上的流的第一个数据包会将流条目添加到流表中，但相关联的操作是执行TCAM查找。 请求被发送到OpenFlow控制器。 响应OpenFlow消息指示一个动作。 响应通过特殊的专用出口快速路径，使得应用该动作，并且将第一分组注入到交换机的主数据输出路径中。 还添加了一个表示该操作的TCAM条目。 然后接收流的第二个分组，并且流表查找导致指示该动作的TCAM查找。 该动作应用于第二个数据包，数据包从交换机输出，并且更新查找表，因此流入口随后将直接指示该动作。 流的后续数据包不涉及TCAM查找。

公开(公告)号：US09299434B2

公开(公告)日：2016-03-29

申请号：US14151730

申请日：2014-01-09

Applicant: Netronome Systems, Inc.

Inventor： Gareth R. Douglas ,  Ciaran J. Toal ,  Sandra Scott-Hayward

IPC: G11C15/04 ,  G06F13/40 ,  H04L12/743 ,  H04L12/819 ,  H04L12/721

CPC classification number: G11C15/04 ,  G06F13/4022 ,  G06F2213/0026 ,  H04L12/462 ,  H04L45/38 ,  H04L45/7453 ,  H04L45/7457 ,  H04L47/21

Abstract: A first packet of a flow received onto an OpenFlow switch causes a flow entry to be added to a flow table, but the associated action is to perform a TCAM lookup. A request is sent to an OpenFlow controller. A response OpenFlow message indicates an action. The response passes through a special dedicated egress fast-path such that the action is applied and the first packet is injected into the main data output path of the switch. A TCAM entry is also added that indicates the action. A second packet of the flow is then received and a flow table lookup causes a TCAM lookup, which indicates the action. The action is applied to the second packet, the packet is output from the switch, and the lookup table is updated so the flow entry will thereafter directly indicate the action. Subsequent packets of the flow do not involve TCAM lookups.

Abstract translation: 接收到OpenFlow交换机上的流的第一个数据包会将流条目添加到流表中，但相关联的操作是执行TCAM查找。 请求被发送到OpenFlow控制器。 响应OpenFlow消息指示一个动作。 响应通过特殊的专用出口快速路径，使得应用该动作，并且将第一分组注入到交换机的主数据输出路径中。 还添加了一个表示该操作的TCAM条目。 然后接收流的第二个分组，并且流表查找导致指示该动作的TCAM查找。 该动作应用于第二个数据包，数据包从交换机输出，并且更新查找表，因此流入口随后将直接指示该动作。 流的后续数据包不涉及TCAM查找。