Methods for disaggregating subscribers via DHCP address translation and devices thereof

• US 10,791,088 B1
• Filed: 06/19/2017
• Issued: 09/29/2020
• Est. Priority Date: 06/17/2016
• Status: Active Grant

• Current Assignee: F5 Networks, Inc. (F5 Incorporated)
• Original Assignee: F5 Networks, Inc. (F5 Incorporated)
• Inventors: Amdahl, Saxon, Dosovitsky, Gennady
• Primary Examiner(s): Grey, Christopher P
• Application Number:
  US15/626,961
• Time in Patent Office: 1,198 Days
• CPC Class Codes: H04L 45/74 Address processing for routing
• CPC Class Codes: H04L 61/2503 Translation of Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 67/01 Protocols

Abstract

Methods, non-transitory computer readable media, network traffic management apparatuses, and network traffic management systems that obtain an assigned Internet Protocol (IP) address from a DHCP server in response to an address request received from a client. One of a plurality of processing cores, on which a traffic management process is executing, is identified. The assigned IP address is modified based on the identified processing core. The modified IP address is sent to the client in response to the received address request. With this technology, connections associated with a same subscriber can advantageously be disaggregated to the same traffic management process.

Claims

1. A method for disaggregating subscribers via Dynamic Host Configuration Protocol (DHCP) address translation implemented by a network traffic management system comprising one or more network traffic management apparatuses, DHCP server devices, or resource server devices, the method comprising:

assigning two client addresses in response to one address request received from a client, wherein assigning the two client addresses comprises;

obtaining a DHCP-assigned Internet Protocol (IP) address from a DHCP server;

selecting one of a plurality of processing cores to process network traffic associated with the client using a traffic management process is executing on the selected processing core; and

modifying the DHCP-assigned IP address, based on the selected processing core, to generate a modified IP address;

sending the modified IP address to the client in response to the received address request;

receiving a subsequent request from the client, the request comprising the modified IP address in a source address field;

identifying the selected processing core using the modified IP address;

sending the subsequent request to the traffic management process executing on the selected processing core;

translating the modified IP address to obtain the DHCP-assigned IP address;

replacing the modified IP address in the source address of the subsequent request with the DHCP-assigned IP address to generate a translated subsequent request; and

sending the translated subsequent request to a resource server.

2. The method of claim 1, wherein the selected processing core is selected because network traffic associated with another client associated with a same subscriber as the client is assigned to be processed by the selected processing core.

3. The method of claim 1, wherein modifying the DHCP-assigned IP address, based on the selected processing core, comprises choosing the modified IP address to hash to an indication of the selected processing core when a hash function is applied to the modified IP address.

4. The method of claim 1, further comprising:

receiving a response to the translated subsequent request from the resource server, the response comprising the DHCP-assigned IP address in a destination address field;

translating the DHCP-assigned IP address to the modified IP address;

identifying the selected processing core using the modified IP address;

sending the response to the traffic management process executing on the selected processing core;

replacing the DHCP-assigned IP address in the destination address of the response with the modified IP address to generate a translated response; and

sending the translated response to the client.

5. A network traffic management apparatus, comprising memory comprising programmed instructions stored thereon and one or more processors configured to execute the stored programmed instructions, wherein the instructions, upon execution, cause the network traffic management apparatus to:

assign two client addresses in response to one address request received from a client, wherein assigning the two client addresses comprises;

obtain a Dynamic Host Configuration Protocol (DHCP)-assigned Internet Protocol (IP) address from a DHCP server;

select one of a plurality of processing cores to process network traffic associated with the client using a traffic management process is executing on the selected processing core; and

modify the DHCP-assigned IP address based on the selected processing core, to generate a modified IP address;

send the modified IP address to the client in response to the received address request;

receive a subsequent request from the client, the request comprising the modified IP address in a source address field;

identify the selected processing core using the modified IP address;

send the subsequent request to the traffic management process executing on the selected processing core;

translate the modified IP address to obtain the DHCP-assigned IP address;

replace the modified IP address in the source address of the subsequent request with the DHCP-assigned IP address to generate a translated subsequent request; and

send the translated subsequent request to a resource server.

6. The network traffic management apparatus of claim 5, wherein the selected processing core is selected because network traffic associated with another client associated with a same subscriber as the client is assigned to be processed by the selected processing core.

7. The network traffic management apparatus of claim 5, wherein modifying the DHCP-assigned IP address, based on the selected processing core, comprises choosing the modified IP address to hash to an indication of the selected processing core when a hash function is applied to the modified IP.

8. The network traffic management apparatus of claim 5, wherein the instructions, upon execution, further cause the network traffic management apparatus to:

receive a response to the translated subsequent request from the resource server, the response comprising the DHCP-assigned IP address in a destination address field;

translate the DHCP-assigned IP address to the modified IP address;

identify the selected processing core using the modified IP address;

send the response to the traffic management process executing on the selected processing core;

replace the DHCP-assigned IP address in the destination address of the response with the modified IP address to generate a translated response; and

send the translated response to the client.

9. A non-transitory computer readable medium having stored thereon instructions for disaggregating subscribers via Dynamic Host Configuration Protocol (DHCP) address translation comprising executable code which when executed by one or more processors, causes the one or more processors to:

assign two client addresses in response to one address request received from a client, wherein assigning the two client addresses comprises;

obtain a DHCP-assigned Internet Protocol (IP) address from a DHCP server;

select one of a plurality of processing cores to process network traffic associated with the client using a traffic management process executing on the selected processing core; and

modify the DHCP-assigned IP address, based on the selected processing core, to generate a modified IP address;

send the modified IP address to the client in response to the received address request receive a subsequent request from the client, the request comprising the modified IP address in a source address field;

identify the selected processing core using the modified IP address;

send the subsequent request to the traffic management process executing on the selected processing core;

translate the modified IP address to obtain the DHCP-assigned IP address;

replace the modified IP address in the source address of the subsequent request with the DHCP-assigned IP address to generate a translated subsequent request; and

send the translated subsequent request to a resource server.

10. The non-transitory computer readable medium of claim 9, wherein the selected processing core is selected because network traffic associated with another client associated with a same subscriber as the client is assigned to be processed by the selected processing core.

11. The non-transitory computer readable medium of claim 9, wherein modifying the DHCP-assigned IP address, based on the selected processing core, comprises choosing the modified IP address to hash to an indication of the selected processing core when a hash function is applied to the modified IP.

12. The computer readable memory of claim 9, wherein the instructions further comprise executable code which when executed by one or more processors, causes the one or more processors to:

receive a response to the translated subsequent request from the resource server, the response comprising the DHCP-assigned IP address in a destination address field;

translate the DHCP-assigned IP address to the modified IP address;

identify the selected processing core using the modified IP address;

send the response to the traffic management process executing on the selected processing core;

replace the DHCP-assigned IP address in the destination address of the response with the modified IP address to generate a translated response; and

send the translated response to the client.

13. A network traffic management system, comprising one or more network traffic management apparatuses, Dynamic Host Configuration Protocol (DHCP) server devices, or resource server devices, the network traffic management system comprising memory comprising programmed instructions stored thereon and one or more processors configured to execute the stored programmed instructions to:

assign two client addresses in response to one address request received from a client, wherein assigning the two client addresses comprises;

obtain a DHCP-assigned Internet Protocol (IP) address from a DHCP server;

select one of a plurality of processing cores to process network traffic associated with the client using a traffic management process is executing on the selected processing core; and

modify the DHCP-assigned IP address, based on the selected processing core, to generate a modified IP address;

send the modified IP address to the client in response to the received address request;

receive a subsequent request from the client, the request comprising the modified IP address in a source address field;

identify the selected processing core using the modified IP address;

send the subsequent request to the traffic management process executing on the selected processing core;

translate the modified IP address to obtain the DHCP-assigned IP address;

replace the modified IP address in the source address of the subsequent request with the DHCP-assigned IP address to generate a translated subsequent request; and

send the translated subsequent request to a resource server.

14. The network traffic management system of claim 13, wherein the selected processing core is selected because network traffic associated with another client associated with a same subscriber as the client is assigned to be processed by the selected processing core.

15. The network traffic management system of claim 13, wherein modifying the DHCP-assigned IP address, based on the selected processing core, comprises choosing the modified IP address to hash to an indication of the selected processing core when a hash function is applied to the modified IP address.

16. The network traffic management system of claim 13, wherein the one or more processors are further configured to execute the stored programmed instructions to:

receive a response to the translated subsequent request from the resource server, the response comprising the DHCP-assigned IP address in a destination address field;

translate the DHCP-assigned IP address to the modified IP address;

identify the selected processing core using the modified IP address;

send the response to the traffic management process executing on the selected processing core;

replace the DHCP-assigned IP address in the destination address of the response with the modified IP address to generate a translated response; and

send the translated response to the client.