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：US20140215091A1

公开(公告)日：2014-07-31

申请号：US13756338

申请日：2013-01-31

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Hemant Singh ,  William Beebee ,  Madhu Sudan ,  Bernard E. Volz ,  Chad Mikkelson

IPC: H04L29/12

CPC classification number: H04L61/2015 ,  H04L12/2878 ,  H04L12/2898 ,  H04L45/741 ,  H04L61/6059 ,  H04L69/14 ,  H04L69/40

Abstract: In one embodiment, methods are described for recovering lost customer premises equipment (CPE) information on a cable modem termination system (CMTS) in the presence of only Dynamic Host Control Protocol Version 6 (DHCPv6) CONFIRM. A CMTS purges routing information for an Internet Protocol Version 6 (IPv6) node, such as a CPE router, in response to detecting an interface reset for the IPv6 node. IPv6 addresses and prefixes information for the IPv6 node is gleaned from a DHCPv6 CONFIRM message received from the IPv6 node. By sending portions of the IPv6 addresses and prefixes information within a DHCPv6 LEASEQUERY message, a DHCPv6 CONFIRM message with an embedded DHCPv6 LEASEQUERY message, or a DHCPv6 CONFIRM message with an Interface-ID option, a reply message can be received that contains the purged routing information for the IPv6 node.

Abstract translation: 在一个实施例中，描述了在仅存在动态主机控制协议版本6（DHCPv6）CONFIRM的情况下在电缆调制解调器终端系统（CMTS）上恢复丢失的客户驻地设备（CPE）信息的方法。 响应于检测到针对IPv6节点的接口重置，CMTS清除因特网协议版本6（IPv6）节点（例如CPE路由器）的路由信息​​。 从IPv6节点收到的DHCPv6 CONFIRM消息中收集IPv6节点的IPv6地址和前缀信息。 通过在DHCPv6 LEASEQUERY消息中发送IPv6地址和前缀信息的部分信息，可以接收包含已清除路由的DHCPv6 LEASEQUERY消息的DHCPv6 CONFIRM消息或具有Interface-ID选项的DHCPv6 CONFIRM消息，回复消息 IPv6节点的信息。

公开(公告)号：US10027622B2

公开(公告)日：2018-07-17

申请号：US13756338

申请日：2013-01-31

Applicant: Cisco Technology, Inc.

Inventor： Hemant Singh ,  William Beebee ,  Madhu Sudan ,  Bernard E. Volz ,  Chad Mikkelson

IPC: H04L29/12 ,  H04L29/14 ,  H04L29/06 ,  H04L12/28 ,  H04L12/749

Abstract: In one embodiment, methods are described for recovering lost customer premises equipment (CPE) information on a cable modem termination system (CMTS) in the presence of only Dynamic Host Control Protocol Version 6 (DHCPv6) CONFIRM. A CMTS purges routing information for an Internet Protocol Version 6 (IPv6) node, such as a CPE router, in response to detecting an interface reset for the IPv6 node. IPv6 addresses and prefixes information for the IPv6 node is gleaned from a DHCPv6 CONFIRM message received from the IPv6 node. By sending portions of the IPv6 addresses and prefixes information within a DHCPv6 LEASEQUERY message, a DHCPv6 CONFIRM message with an embedded DHCPv6 LEASEQUERY message, or a DHCPv6 CONFIRM message with an Interface-ID option, a reply message can be received that contains the purged routing information for the IPv6 node.

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。