Patent ID: 11962567
Assignee: CISCO TECHNOLOGY, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method comprising:
at a wireless local area network (WLAN) controller (WLAN controller) configured to communicate with and control wireless access points through which wireless client devices communicate with the WLAN controller:
upon receiving, from a wireless client device, a dynamic host configuration protocol (DHCP) request (DHCP request) having a media access control (MAC) address (MAC address) and a client identifier configured to be stable across MAC rotations, determining whether the wireless client device rotated its MAC address from a previous MAC address to the MAC address based on the client identifier;
when the wireless client device rotated its MAC address, generating a notification of a MAC address rotation, and forwarding the DHCP request with the notification of the MAC address rotation to a DHCP service to cause the DHCP service to reassign a previously assigned Internet Protocol (IP) address to the wireless client device; and
upon receiving, from the DHCP service, a DHCP offer asserting the previously assigned IP address, forwarding the DHCP offer to the wireless client device; and

at the DHCP service:
upon receiving, from the WLAN controller, notifications of the MAC rotations for the wireless client devices, determining a mean MAC address rotation interval based on the notifications; and

adjusting an IP address lease time based on the mean MAC address rotation interval.