RECLAIMING LEASED IP ADDRESSES IN WIRELESS NETWORKS

• US 20160127311A1
• Filed: 11/04/2014
• Published: 05/05/2016
• Est. Priority Date: 11/04/2014
• Status: Abandoned Application

• Current Assignee: Avaya Incorporated
• Original Assignee: Avaya Incorporated
• Inventors: Atreya, Vivek L., Ankaiah, Shashi Hosakere, Lakshminarayana, Umesh Vidyaranyapura
• Application Number:
  US14/533,046
• Publication Number:
  US 20160127311A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 61/5053 Lease time; Renewal aspects

Abstract

Methods, systems and computer readable media for reclaiming DHCP leased IP address from disassociated clients in a WLAN are described.

Claims

1. A method comprising:

detecting, at a wireless access point, that a client has lost connectivity with the wireless access point;

determining, at the wireless access point, whether the client released its leased IP address;

transmitting, from the wireless access point to a wireless controller, a message indicating the client has lost connectivity and an indication of whether the client released its leased IP address;

starting an IP address reclaim timer at the wireless controller;

when the IP address reclaim timer expires, sending an instruction message to a wireless switching point instructing the wireless switching point to send an IP address release message on behalf of the client; and

sending, from the wireless switching point, the IP address release message on behalf of the client.

2. The method of claim 1, further comprising stopping the IP address reclaim timer when the client reconnects, before the IP address reclaim timer expires, to the network at a same or different wireless access point than the client was previously connected to.

3. The method of claim 1, wherein the IP address is a DHCP leased IP address.

4. The method of claim 1, wherein the wireless access point performs the operations of the wireless switching point.

5. A system comprising one or more processors configured to perform operations including:

detecting, at a wireless access point, that a client has lost connectivity with the wireless access point;

determining, at the wireless access point, whether the client released its leased IP address;

transmitting, from the wireless access point to a wireless controller, a message indicating the client has lost connectivity and an indication of whether the client released its leased IP address;

starting an IP address reclaim timer at the wireless controller;

when the IP address reclaim timer expires, sending an instruction message to a wireless switching point instructing the wireless switching point to send an IP address release message on behalf of the client; and

sending, from the wireless switching point, the IP address release message on behalf of the client.

6. The system of claim 5, wherein the operations further comprise stopping the IP address reclaim timer when the client reconnects, before the IP address reclaim timer expires, to the network at a same or different wireless access point than the client was previously connected to.

7. The system of claim 5, wherein the IP address is a DHCP leased IP address.

8. The system of claim 5, wherein the wireless access point performs the operations of the wireless switching point.

9. A nontransitory computer readable medium having stored thereon software instructions that, when executed by one or more processors, cause the one or more processors to perform operations including:

detecting, at a wireless access point, that a client has lost connectivity with the wireless access point;

determining, at the wireless access point, whether the client released its leased IP address;

transmitting, from the wireless access point to a wireless controller, a message indicating the client has lost connectivity and an indication of whether the client released its leased IP address;

starting an IP address reclaim timer at the wireless controller;

when the IP address reclaim timer expires, sending an instruction message to a wireless switching point instructing the wireless switching point to send an IP address release message on behalf of the client; and

sending, from the wireless switching point, the IP address release message on behalf of the client.

10. The nontransitory computer readable medium of claim 9, wherein the operations further comprise stopping the IP address reclaim timer when the client reconnects, before the IP address reclaim timer expires, to the network at a same or different wireless access point than the client was previously connected to.

11. The nontransitory computer readable medium of claim 9, wherein the IP address is a DHCP leased IP address.

12. The nontransitory computer readable medium of claim 9, wherein the wireless access point performs the operations of the wireless switching point.