公开(公告)号：US20140044012A1

公开(公告)日：2014-02-13

申请号：US14056659

申请日：2013-10-17

Applicant: Cisco Technology, Inc.

Inventor： Hemant Singh ,  William Beebee, JR. ,  Ralph Droms ,  Ole Troan

IPC: H04L12/24

CPC classification number: H04L41/0803 ,  H04L29/12226 ,  H04L41/0816 ,  H04L61/2015 ,  H04L61/6059

Abstract: Techniques for automatically identifying an edge-facing router in a network are provided. In one technique, a DHCP message is obtained at a router of a subscriber network. An options field of the DHCP message is identified. The options field of the DHCP message is analyzed to determine whether data in the options field indicates that first router is SP-facing. If it is determined that the router is an SP-facing router, then identification data that identifies the router as an SP-facing router is stored.

Abstract translation: 提供了一种用于自动识别网络中边缘路由器的技术。 在一种技术中，在订户网络的路由器处获得DHCP消息。 识别DHCP消息的选项字段。 分析DHCP消息的选项字段以确定选项字段中的数据是否指示第一个路由器是面向SP的。 如果确定路由器是面向SP的路由器，则存储将路由器标识为面向SP的路由器的标识数据。

公开(公告)号：US10057208B2

公开(公告)日：2018-08-21

申请号：US14529725

申请日：2014-10-31

Applicant: Cisco Technology, Inc.

Inventor： Ralph Droms ,  Timothy P. Donahue

IPC: G06F15/173 ,  H04L29/12 ,  G06F17/30

CPC classification number: H04L61/1511 ,  H04L61/1541

Abstract: Techniques are provided for performing domain name system (DNS) service discovery based on policy evaluations. In an embodiment, policy data is represented as DNS-SD records and is used to control visibility of services for service requesting devices. The policy data may describe policies for a particular type of a service or a particular service delivery unit. The visibility of service delivery units is determined through evaluations of the policies in policy data. In some embodiments, additional metadata may be retrieved to be used in the policy evaluations. In certain embodiments, based on the policy evaluations service data about only a subset of service delivery units available is returned to a service requesting device in response to a DNS-SD query.

公开(公告)号：US20170317968A1

公开(公告)日：2017-11-02

申请号：US15652094

申请日：2017-07-17

Applicant: Cisco Technology, Inc.

Inventor： Ralph Droms ,  Timothy P. Donahue

IPC: H04L29/12 ,  H04L12/24

Abstract: Techniques are provided for performing dynamic DNS-SD. In an embodiment, an apparatus includes one or more databases, one or more transceivers to receive a first Domain Name System (DNS) query from a first computing device, the first DNS query defining a first service discovery name space, and one or more processors in communication with each of the one or more databases and the one or more transceivers. The one or more processors generate and append a first metadata associated with the first computing device to the first DNS query. The one or more transceivers transmit the first DNS query and the first metadata to a Domain Name System (DNS) server computer, receive, from the DNS server computer, a first response responsive to the first DNS query, and relay, to the first computing device, the first response.

公开(公告)号：US10742592B2

公开(公告)日：2020-08-11

申请号：US15652094

申请日：2017-07-17

Applicant: Cisco Technology, Inc.

Inventor： Ralph Droms ,  Timothy P. Donahue

IPC: H04L29/12 ,  H04L12/24

Abstract: Techniques are provided for performing dynamic DNS-SD. In an embodiment, an apparatus includes one or more databases, one or more transceivers to receive a first Domain Name System (DNS) query from a first computing device, the first DNS query defining a first service discovery name space, and one or more processors in communication with each of the one or more databases and the one or more transceivers. The one or more processors generate and append a first metadata associated with the first computing device to the first DNS query. The one or more transceivers transmit the first DNS query and the first metadata to a Domain Name System (DNS) server computer, receive, from the DNS server computer, a first response responsive to the first DNS query, and relay, to the first computing device, the first response.

公开(公告)号：US09712485B2

公开(公告)日：2017-07-18

申请号：US14447475

申请日：2014-07-30

Applicant: Cisco Technology, Inc.

Inventor： Ralph Droms ,  Timothy P. Donahue

IPC: G06F15/16 ,  H04L29/12 ,  H04L12/24

CPC classification number: H04L61/1511 ,  H04L41/12 ,  H04L61/1541 ,  H04L61/2076

Abstract: Techniques are provided for performing dynamic DNS-SD. In an embodiment, an apparatus includes one or more databases, one or more transceivers to receive a first Domain Name System (DNS) query from a first computing device, the first DNS query defining a first service discovery name space, and one or more processors in communication with each of the one or more databases and the one or more transceivers. The one or more processors generate and append a first metadata associated with the first computing device to the first DNS query. The one or more transceivers transmit the first DNS query and the first metadata to a Domain Name System (DNS) server computer, receive, from the DNS server computer, a first response responsive to the first DNS query, and relay, to the first computing device, the first response.

公开(公告)号：US09699136B2

公开(公告)日：2017-07-04

申请号：US14643979

申请日：2015-03-10

Applicant: Cisco Technology, Inc.

Inventor： Rajiv Asati ,  Ralph Droms

IPC: H04L29/12 ,  H04L12/24

CPC classification number: H04L61/1511 ,  H04L41/0883 ,  H04L61/2015 ,  H04L61/2076 ,  H04L61/2092

Abstract: Techniques are disclosed for dynamically determining or learning hostnames. According to embodiments described herein, a solicitation message is received at a first network device. Based on the solicitation message, a hostname is determined for a second network device that sent the solicitation message. A first network address is also determined for the second network device that sent the solicitation message. A mapping between the hostname and the first network address is stored at the first network device.

公开(公告)号：US20160036762A1

公开(公告)日：2016-02-04

申请号：US14447475

申请日：2014-07-30

Applicant: Cisco Technology, Inc.

Inventor： Ralph Droms ,  Timothy P. Donahue

IPC: H04L29/12 ,  H04L12/24

CPC classification number: H04L61/1511 ,  H04L41/12 ,  H04L61/1541 ,  H04L61/2076

Abstract: Techniques are provided for performing dynamic DNS-SD. In an embodiment, an apparatus includes one or more databases, one or more transceivers to receive a first Domain Name System (DNS) query from a first computing device, the first DNS query defining a first service discovery name space, and one or more processors in communication with each of the one or more databases and the one or more transceivers. The one or more processors generate and append a first metadata associated with the first computing device to the first DNS query. The one or more transceivers transmit the first DNS query and the first metadata to a Domain Name System (DNS) server computer, receive, from the DNS server computer, a first response responsive to the first DNS query, and relay, to the first computing device, the first response.

Abstract translation: 提供了用于执行动态DNS-SD的技术。 在一个实施例中，一种装置包括一个或多个数据库，一个或多个收发器，用于从第一计算设备接收第一域名系统（DNS）查询，第一DNS查询定义第一服务发现名称空间，以及一个或多个处理器 与一个或多个数据库和一个或多个收发器中的每一个通信。 一个或多个处理器生成并附加与第一计算设备相关联的第一元数据到第一DNS查询。 一个或多个收发器将第一DNS查询和第一元数据发送到域名系统（DNS）服务器计算机，从DNS服务器计算机接收响应于第一DNS查询的第一响应，并将其中继到第一计算 设备，第一反应。

公开(公告)号：US09215141B2

公开(公告)日：2015-12-15

申请号：US14572407

申请日：2014-12-16

Applicant: Cisco Technology, Inc.

Inventor： Rajiv Asati ,  Ralph Droms ,  Vijay Bollapragada

IPC: G06F15/173 ,  H04L12/24 ,  H04L12/46 ,  H04L12/715 ,  H04L29/12

CPC classification number: H04L41/0823 ,  H04L12/4641 ,  H04L41/0806 ,  H04L41/0816 ,  H04L41/0886 ,  H04L45/04 ,  H04L61/2015

Abstract: In an embodiment, an electronic digital data packet router performs receiving a DHCP initiation message on a particular interface among a plurality of network interfaces; modifying the DHCP initiation message by adding a particular DHCP option that signals a DHCP server to provide router configuration data, resulting in a modified DHCP initiation message; relaying the modified DHCP initiation message to the DHCP server; receiving, from the DHCP server, a DHCPOFFER message that comprises the particular DHCP option containing configuration data; configuring the router using the configuration data; relaying the DHCPOFFER message without the particular DHCP option on the particular interface toward another data packet router.

Abstract translation: 在一个实施例中，电子数字数据包路由器在多个网络接口之间的特定接口上执行DHCP发起消息; 通过添加特定的DHCP选项来修改DHCP启动消息，该选项指示DHCP服务器提供路由器配置数据，导致修改的DHCP启动消息; 将修改的DHCP启动消息中继到DHCP服务器; 从DHCP服务器接收包含包含配置数据的特定DHCP选项的DHCPOFFER消息; 使用配置数据配置路由器; 将特定接口上没有特定DHCP选项的DHCPOFFER消息中继到另一个数据包路由器。

公开(公告)号：US08917737B2

公开(公告)日：2014-12-23

申请号：US14056659

申请日：2013-10-17

Applicant: Cisco Technology, Inc.

Inventor： Hemant Singh ,  William Beebee, Jr. ,  Ralph Droms ,  Ole Troan

IPC: H04L12/28 ,  H04L12/24 ,  H04L29/12

CPC classification number: H04L41/0803 ,  H04L29/12226 ,  H04L41/0816 ,  H04L61/2015 ,  H04L61/6059

Abstract: Techniques for automatically identifying an edge-facing router in a network are provided. In one technique, a DHCP message is obtained at a router of a subscriber network. An options field of the DHCP message is identified. The options field of the DHCP message is analyzed to determine whether data in the options field indicates that first router is SP-facing. If it is determined that the router is an SP-facing router, then identification data that identifies the router as an SP-facing router is stored.

Abstract translation: 提供了一种用于自动识别网络中边缘路由器的技术。 在一种技术中，在订户网络的路由器处获得DHCP消息。 识别DHCP消息的选项字段。 分析DHCP消息的选项字段以确定选项字段中的数据是否指示第一个路由器是面向SP的。 如果确定路由器是面向SP的路由器，则存储将路由器标识为面向SP的路由器的标识数据。