Device abstraction in autonomous wireless local area networks

• US 9,712,383 B2
• Filed: 09/17/2013
• Issued: 07/18/2017
• Est. Priority Date: 06/30/2011
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Aruba Networks Incorporated (Hewlett-Packard Enterprise Company)
• Inventors: Iyer, Pradeep, Lu, Hao, Liu, Yan
• Primary Examiner(s): Vu, Viet
• Assistant Examiner(s): Edwards, James
• Application Number:
  US14/029,695
• Publication Number:
  US 20150032861A1
• Time in Patent Office: 1,400 Days
• Field of Search: None
• CPC Class Codes: H04L 41/0803 Configuration setting
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H04L 61/5092 by self-assignment, e.g. picking addresses at random and testing if they are already in use
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 8/28 Number portability ; Network address portability

Abstract

According to embodiments of the present disclosure, a managed network device assigns to itself an IP address, in absence of a DHCP service, in a link local address space within a wireless network. The system further responds to a network frame received from another device based on the assigned IP address in the link local address space. The network frame can be a network traffic frame, a control path frame, and/or a management frame. The control path frame comprises a source IP address and a destination IP address that correspond to internal IP addresses in the link local address space that are self-assigned by managed network devices. The management frame comprises the self-assigned internal IP address for the managed network device, and provides for management of managed network devices in the wireless network through a single IP address when a virtual controller is configured for the wireless network.

Claims

1. A non-transitory computer-readable storage medium storing embedded instructions that are executed by one or more mechanisms implemented within an access point to perform a plurality operations comprising:

transmitting, by an access point in a plurality of access points to other access points in the plurality of access points, an Internet Protocol (IP) address conflict check request to determine if any of the other access points are using a particular IP address within a reserved address space;

in response to the particular IP address being used by one of the other access points;

selecting, by the access point, a second IP address with the reserved address space for self-assigning to the access point;

in response to the particular IP address not being used by one of the other access points;

self-assigning, by the access point, the particular IP address within the reserved address space;

communicating with the other access points using the particular IP address within the reserved address space for control path communications; and

communicating with the other access a different IP address that is externally assigned and outside the reserved address space while operating as a virtual network controller for the plurality of access points.

2. The non-transitory computer-readable storage medium of claim 1, wherein the particular IP address is an internal IP address in a link local address space.

3. The non-transitory computer-readable storage medium of claim 1, wherein each of the plurality of other access points uses a self-assigned IP address.

4. The non-transitory computer-readable storage medium of claim 3, wherein each of the access points uses the self-assigned IP address while providing network access to one or more client devices.

5. The non-transitory computer-readable storage medium of claim 1, wherein the plurality of operations further comprising:

responding to a control path frame or a management network frame received by the access point from another access point in the plurality of access points based on the self-assigned internal IP address in the link local address space, wherein the other access point in the plurality of access points is assigned another IP address outside the link local address space.

6. The non-transitory computer-readable storage medium of claim 5, wherein the plurality of operations further comprising:

determining whether the access point is elected as a network controlling device for the plurality of access points in the wireless network; and

responsive to the access point being elected as the network controlling device, receiving a global IP address assignment for the network controlling device.

7. A network device serving as an access point in a plurality of access points comprising:

a processor;

a network interface;

a transmitting mechanism coupled to the processor, the transmitting mechanism transmitting to other access points in the plurality of access points an Internet Protocol (IP) address conflict check request to determine if any of the other access points are using a particular IP address within a reserved address space;

a selecting mechanism coupled to the processor, the selecting mechanism selecting a second IP address within the reserved address space for self-assigning to the access point in response to the particular IP address being used by one of the other access points;

an assigning mechanism coupled to the processor, the assigning mechanism self-assigning the particular IP address within the reserved address space in response to the particular IP address not being used by one of the other access points; and

a communicating mechanism coupled to the process, the communicating mechanism communicating with the other access points using the particular IP address within the reserved address space for control path communications and communicating with the other access points using a different IP address that is externallv assigned and outside the reserved address space while operating as a virtual network controller for the plurality of access points.

8. The network device of claim 7, wherein the particular IP address is an internal IP address in a link local address space.

9. The network device of claim 7, wherein each of the plurality of other access points uses a self-assigned IP address.

10. The network device of claim 9, wherein each of the access points uses the self-assigned IP address while providing network access to one or more client devices.

11. The network device of claim 7, wherein the transmitting mechanism further to respond to a control path frame or a management network frame received by the access point from another access point in the plurality of access points based on the self-assigned internal IP address in the link local address space, wherein the other access point in the plurality of access points is assigned another IP address outside the link local address space.

12. The network device of claim 11, further comprising:

a receiving mechanism coupled to the processor, the receiving mechanism to receive a global TP address assignment for the network controlling device in response to the access point being elected as the network controlling device,

wherein the determining mechanism further to determine whether the access point is elected as a network controlling device for the plurality of access points in the wireless network.

13. The network device of claim 12, wherein the global IP address comprises a static IP address, and wherein the self-assigned IP address comprises an internal IP address.

14. The network device of claim 12, wherein the network controlling device provides one or more of following services:

an Institute of Electrical and Electronics Engineers (IEEE) 802.1x authentication to an internal and/or external Remote Authentication Dial-In User Service (RADIUS) server;

an MAC authentication to an internal and/or external RADIUS server;

a built-in Dynamic Host Configuration Protocol (DHCP) service to assign wireless client devices IP addresses;

an internal secured management

interface;

Layer-3 forwarding;

Network Address Translation (NAT) service between the wireless network and a wired network coupled to the network device;

an internal and/or external captive portal; and

an external management system for managing the network devices in the wireless network.

15. A non-transitory computer-readable storage medium storing embedded instructions that are executed by one or more mechanisms implemented within an access point to perform a plurality of operations comprising:

transmitting an IP address conflict check request to other access points in the plurality of access points in a reserved address space;

in response to the IP address conflict being detected by an access point among a plurality of access points in a wireless network, self-assigning an internal Internet Protocol (IP) address in the reserved address space, wherein the plurality of access points are self-assigned with a plurality of internal IP addresses in the reserved address space;

in response to the particular IP address being used by one of the other access points, selecting a second IP address within the reserved address space for self-assigning to the access point;

communicating with the other access points using the particular IP address within the reserved address space for control path communications; and

communicating with the other access points using a different IP address that is externally assigned and outside the reserved address space while operating as a virtual network controller for the plurality of access points.

16. The non-transitory computer-readable storage medium of claim 15, wherein the internal IP address comprises an Internet Protocol version 4 (IPv4) address or an Internet Protocol version 6 (IPv6) address.

17. The non-transitory computer-readable storage medium of claim 15, wherein the network frame is a management frame received from a second access point, and wherein the second access point is assigned an IP address outside the link local address space.

18. The non-transitory computer-readable storage medium of claim 17, wherein the assigned IP address corresponds to a destination IP address in the network frame, and wherein the network frame comprises a source IP address in the link local address space that is assigned to the second access point.

19. The non-transitory computer-readable storage medium of claim 15, further comprising:

a forwarding mechanism coupled to the processor, the forwarding mechanism to forward the network traffic from wireless client devices to a wired network coupled to the network device.

20. The non-transitory computer-readable storage medium of claim 15, wherein access points in the wireless network that are self-assigned with internal IP addresses within the link local address space are managed using a single IP address through the access point elected as the network controlling device.