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.