Patent ID: 8553685

Claim:
A method comprising: receiving, by a new session border controller (SBC) device of a provider network, provisioning information to migrate customer devices within a customer network from an original SBC device, of the provider network, to the new SBC device, the provisioning information including one or more fully-qualified domain names (FQDNs) associated with the original SBC device; sending, by the original SBC device and to a dynamic host configuration protocol (DHCP) server, configuration information, for the customer devices, to change an IP address associated with a DNS component of the original SBC device to a new IP address associated with a DNS component of the new SBC device; updating domain name system (DNS) server entries for the one or more FQDNs based on the provisioning information; providing, to the customer devices within the customer network, DNS entry updates for the one or more FQDNs based on the updating of the DNS server entries; and receiving, by the new SBC device, a session initiation protocol (SIP) session signal from a particular customer device of the customer devices.