Patent ID: 9553805
Date: 2017-01-24
CPC Classifications: H04L

Claim:
1. A method for informing a carrier grade network address translation (CGN) exception, comprising: receiving, by a receiving unit of an access router (AR), a first packet sent in a unicast manner by a carrier grade network address translation (CGN) device, wherein the first packet comprises information for indicating Restart announce, a source address of the first packet is an address of the CGN device, and a destination address of the first packet is an address of the AR; changing, by a generating unit of the AR, the destination address of the first packet to an address of a customer premise equipment (CPE) connected to the AR, to obtain a second packet, wherein the AR and the CPE are connected by using a Layer 2 network, and the address of the CPE is a multicast address; and sending, by a sending unit of the AR, the second packet to the CPE.