Patent ID: 9654331
Date: 2017-05-16
CPC Classifications: H04L

Claim:
1. A method, comprising: receiving a packet in a data stream; determining that an access concentrator has lost customer premise equipment information related to the received packet, wherein the lost customer premise equipment information includes prefix delegation route information; evaluating the received packet to determine if the received packet is from customer premise equipment or is destined for the customer premise equipment; and obtaining the customer premise equipment information that is lost by evaluating Neighbor Discovery data and dynamic host configuration protocol version six (DHCPv6) lease query data, wherein data related to customer premise equipment behind a cable modem that is offline is filtered from the DHCPv6 lease query data, wherein a source verify operation is used in response to the received packet being from the customer premise equipment associated with the customer premise equipment information and a reverse path forwarding operation was successful, and wherein a downstream route lookup is used in response to the received packet being destined for the customer premise equipment.