Allocating and distributing labels for packet encapsulation
    32.
    发明授权
    Allocating and distributing labels for packet encapsulation 有权
    分配和分发报文封装标签

    公开(公告)号:US09088519B2

    公开(公告)日:2015-07-21

    申请号:US13525073

    申请日:2012-06-15

    IPC分类号: H04L12/723 H04L12/46

    摘要: In one example, a network device receives a packet to be forwarded according to a label switching protocol, determines a service to be performed on the packet by a service network device, sends a label request message to the service network device, wherein the label request message indicates support for labels having a particular length, wherein the particular length is larger than twenty bits (e.g., forty bits), and wherein the label request message specifies the service to be performed on the packet, receives, in response to the label request message, a label mapping message defining a label of the particular length, appends the label to the packet to form a Multi-Protocol Label Switching (MPLS)-encapsulated packet, and forwards the MPLS-encapsulated packet according to the label switching protocol.

    摘要翻译: 在一个示例中,网络设备根据标签交换协议接收要转发的分组,由服务网络设备确定要在分组上执行的服务,向服务网络设备发送标签请求消息,其中标签请求 消息指示对具有特定长度的标签的支持,其中特定长度大于二十位(例如,四十位),并且其中标签请求消息指定要对分组执行的服务,响应于标签请求而接收 消息,定义特定长度的标签的标签映射消息,将标签附加到分组以形成多协议标签交换(MPLS)封装的分组,并根据标签交换协议转发MPLS封装的分组。

    Path computation element communication protocol (PCEP) extensions for stateful label switched path management
    33.
    发明授权
    Path computation element communication protocol (PCEP) extensions for stateful label switched path management 有权
    用于状态标签交换路径管理的路径计算单元通信协议(PCEP)扩展

    公开(公告)号:US08885463B1

    公开(公告)日:2014-11-11

    申请号:US13324861

    申请日:2011-12-13

    IPC分类号: H04L12/28

    CPC分类号: H04L45/50 H04L45/02 H04L45/38

    摘要: In general, techniques are described for extending a path computation element (PCE) communication protocol (PCEP) to support messages that enable PCEs to actively modify Multi-Protocol Label Switching (MPLS) for Traffic Engineering Label Switched Paths (TE LSPs) in and across network domains. In one example, an LSP database of a router includes configuration data for one or more LSPs configured in the router and further includes LSP state information specifying a current state of all LSPs of the router. A path computation client (PCC) of a router establishes an extended PCEP session and synchronizes LSP state information to a stateful PCE using the extended PCEP session. Subsequently, the stateful PCE sends an LSP update request to the PCC in the extended PCEP session, wherein the LSP update request includes one or more updated parameters for the LSP. The PCC then re-signals the LSP through the network according to the updated parameters.

    摘要翻译: 通常,描述了用于扩展路径计算元件(PCE)通信协议(PCEP)以支持使得PCE能够主动修改用于和跨越的流量工程标签交换路径(TE LSP)的多协议标签交换路由(MPLS)的消息的技术。 网域。 在一个示例中,路由器的LSP数据库包括在路由器中配置的一个或多个LSP的配置数据,还包括指定路由器所有LSP的当前状态的LSP状态信息。 路由器的路径计算客户端(PCC)建立扩展PCEP会话,并使用扩展PCEP会话将LSP状态信息同步到有状态PCE。 随后,有状态PCE在扩展PCEP会话中向PCC发送LSP更新请求,其中LSP更新请求包括用于LSP的一个或多个更新的参数。 然后,PCC根据更新的参数通过网络重新发送LSP。

    Hierarchical flooding among peering overlay networks
    35.
    发明授权
    Hierarchical flooding among peering overlay networks 有权
    对等覆盖网络中的分层洪泛

    公开(公告)号:US08228822B2

    公开(公告)日:2012-07-24

    申请号:US12396721

    申请日:2009-03-03

    IPC分类号: H04L12/28

    CPC分类号: H04L45/00 H04L45/32 H04L45/64

    摘要: In a tiered system of networks capable of processing distributed hash table (DHT) Put and Get messages, if a sending network of a Put or Get is at a tier below a subject tier at which a subject network receiving the message is located, the message is forwarded to networks at tiers below the subject tier. On the other hand, if the sending network is at a tier equal to or above the subject tier, the message is forwarded to all networks in the system other than the sending network.

    摘要翻译: 在能够处理分布式哈希表(DHT)Put和Get消息的分层网络系统中,如果Put或Get的发送网络处于接收消息的主题网络所处的主体层以下的层,则该消息 被转发到主体层以下的网络。 另一方面,如果发送网络处于等于或高于主体层的层,则将消息转发到系统中除发送网络之外的所有网络。

    DYNAMICALLY GENERATING APPLICATION-LAYER TRAFFIC OPTIMIZATION PROTOCOL MAPS
    36.
    发明申请
    DYNAMICALLY GENERATING APPLICATION-LAYER TRAFFIC OPTIMIZATION PROTOCOL MAPS 有权
    动态生成应用层交通协议优化协议

    公开(公告)号:US20120144066A1

    公开(公告)日:2012-06-07

    申请号:US13110987

    申请日:2011-05-19

    IPC分类号: G06F15/173

    摘要: In general, techniques are described for using routing information obtained by operation of network routing protocols to dynamically generate network and cost maps for an application-layer traffic optimization (ALTO) service. For example, an ALTO server of an autonomous system (AS) receives routing information from routers of the AS by listening for routing protocol updates outputted by the routers and uses the received topology information to dynamically generate a network map of PIDs that reflects a current topology of the AS and/or of the broader network that includes the AS. Additionally, the ALTO server dynamically calculates inter-PID costs using received routing information that reflects current link metrics. The ALTO server then assembles the inter-PID costs into a cost map that the ALTO server may provide, along with the network map, to clients of the ALTO service.

    摘要翻译: 一般来说,描述了使用通过网络路由协议的操作而获得的路由信息​​来动态地生成用于应用层流量优化(ALTO)服务的网络和成本映射的技术。 例如,自治系统(AS)的ALTO服务器通过监听由路由器输出的路由协议更新从AS的路由器接收路由信息,并使用接收的拓扑信息动态生成反映当前拓扑的PID的网络映射 的AS和/或包括AS的更广泛的网络。 此外,ALTO服务器使用反映当前链路指标的接收路由信息动态计算PID间成本。 然后,ALTO服务器将PID成本组合到ALTO服务器可以提供的成本图以及网络映射到ALTO服务的客户端。

    APPLICATION-LAYER TRAFFIC OPTIMIZATION SERVICE ENDPOINT TYPE ATTRIBUTE
    37.
    发明申请
    APPLICATION-LAYER TRAFFIC OPTIMIZATION SERVICE ENDPOINT TYPE ATTRIBUTE 有权
    应用层交通优化服务端点类型属性

    公开(公告)号:US20110295983A1

    公开(公告)日:2011-12-01

    申请号:US12861671

    申请日:2010-08-23

    IPC分类号: G06F15/177 G06F15/173

    摘要: Using the ALTO Service, networking applications can request through the ALTO protocol information about the underlying network topology from the ISP or Content Provider. The ALTO Service provides information such as network resource preferences with the goal of modifying network resource consumption patterns while maintaining or improving application performance. This document describes, in one example, an ALTO server that implements enhancements to the ALTO service to assign a PID-type attribute to each of a set of one or more PIDs each associated with a subset of one or more endpoints of a network, wherein a PID-type attribute specifies a type for the subset of endpoints associated with the PID. The ALTO server generates an ALTO network map that includes a PID entry to describe each of the PIDs, wherein each PID entry includes a PID-type field that stores the assigned PID-type attribute for the PID described by the PID entry.

    摘要翻译: 使用ALTO服务,网络应用程序可以通过ALTO协议向ISP或内容提供商请求关于底层网络拓扑的信息。 ALTO服务提供诸如网络资源偏好的信息,目的是在维护或提高应用程序性能的同时修改网络资源消耗模式。 本文档在一个示例中描述了ALTO服务器,其实现对ALTO服务的增强以将PID类型属性分配给每个与网络的一个或多个端点的子集相关联的一个或多个PID的集合中的每一个,其中 PID类型属性指定与PID相关联的端点子集的类型。 ALTO服务器生成包括用于描述每个PID的PID条目的ALTO网络映射,其中每个PID条目包括存储由PID条目描述的PID的分配的PID类型属性的PID类型字段。

    Virtual service endpoint
    38.
    发明授权
    Virtual service endpoint 有权
    虚拟服务终端

    公开(公告)号:US07899916B1

    公开(公告)日:2011-03-01

    申请号:US10677090

    申请日:2003-09-30

    IPC分类号: G06F15/16

    CPC分类号: H04L45/10 H04L12/5601

    摘要: A system and method are disclosed for establishing a connection between a first endpoint participating in a first protocol and a second endpoint participating in a second protocol. Establishing a connection includes establishing a virtual service endpoint participating in the first protocol on a network device that is connected to the first endpoint and the second endpoint and forwarding to the second endpoint communication directed from the first endpoint to the virtual service endpoint.

    摘要翻译: 公开了一种用于建立参与第一协议的第一端点和参与第二协议的第二端点之间的连接的系统和方法。 建立连接包括在连接到第一端点和第二端点的网络设备上建立参与第一协议的虚拟服务端点,并且转发到从第一端点指向虚拟服务端点的第二端点通信。

    Switching fabric port mapping in large scale redundant switches
    40.
    发明授权
    Switching fabric port mapping in large scale redundant switches 有权
    在大规模冗余交换机中切换Fabric端口映射

    公开(公告)号:US07289513B1

    公开(公告)日:2007-10-30

    申请号:US09883062

    申请日:2001-06-15

    申请人: Jan Medved John Ellis

    发明人: Jan Medved John Ellis

    IPC分类号: H04L12/56

    摘要: A method and system for mapping logical fabric ports to line ingress queues. The system provides for the mapping of line ingress queues to logical destination ports instead of to physical fabric ports. The association of ingress queues with logical destination ports enables a doubling of the switch port capacity that is available when redundancy is employed on all switch ports within the switching fabric. The method and system provides for the distributed broadcasting of mapping table updates. The system employs a multi-shelf switching fabric. Upon the active-standby switchover of a shelf line card, the shelf manager on the impacted shelf, broadcasts by means of a broadcast control cell (BCC), mapping table updates to the TM ASICs associated with each shelf in the shelf cluster. These updates include the current logical to physical port mappings of the logical and the physical ports located on the impacted shelf.

    摘要翻译: 将逻辑结构端口映射到线入口队列的方法和系统。 系统提供线路入口队列映射到逻辑目的端口,而不是物理接口端口。 入口队列与逻辑目标端口的关联使得在交换结构中的所有交换机端口上采用冗余时可用的交换机端口容量加倍。 该方法和系统提供映射表更新的分布式广播。 该系统采用多层交换结构。 在货架线卡的主动 - 备用切换之后,受影响的货架上的货架管理器通过广播控制单元(BCC)广播,将表格更新映射到与货架集群中的每个货架相关联的TM ASIC。 这些更新包括位于受影响的货架上的逻辑和物理端口的当前逻辑到物理端口映射。