Patent ID: 9210124
Filing Date: 2015-12-08
Classification: G06F,H04L

Abstract:
1. A method for allocating a public Internet Protocol (IP) address, comprising: receiving, by a carrier-grade network (CGN) address translation device, a user on-line packet, and in response judging whether an idle public IP address is available in a public IP address pool; determining, during the judging, that the idle public IP address is not available in a situation from the group of situations consisting of: constructing and sending, by the CGN device in response to the determining that the idle public IP address is not available, a DHCP Request packet to a Dynamic Host Configuration Protocol (DHCP) Server, requesting obtaining a public IP address set, wherein a Code 61 in the DHCP Request packet comprises a number of the public IP address applied for by the CGN device, receiving the public IP address set from the DHCP Server, storing each public IP address of the public IP address set into the public IP address pool; and allocating, by the CGN device, a first public IP address in the public IP address set to a user.