Method and apparatus for creating policies for policy-based management of quality of service treatments of network data traffic flows

• US 20070204036A1
• Filed: 04/30/2007
• Published: 08/30/2007
• Est. Priority Date: 07/02/1999
• Status: Active Grant

• Current Assignee: Shai Mohaban, Steven Woo
• Original Assignee: Shai Mohaban, Steven Woo
• Inventors: Mohaban, Shai, Woo, Steven
• Granted Patent: US 7,970,893 B2
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

Techniques for creating policies for use in policy-based management of quality of service treatments of network data traffic flows are described. Policies are defined based on information about types of flows generated by an application and quality of service functions that are available in the network. Application information is received that defines flows generated by an application, including points where the application generates the traffic flows. QoS information is received that defines one of more quality of service treatments that the network device may apply to data processed by the network device. Based on the information, processing policies that associate the flows with the QoS treatments are determined. Mappings of the application information to the QoS treatments, which may be used to generate the quality of service value when the application program generates flows, are created and stored. Thus, the policies are informed both by application expertise and network expertise.

Claims

1. A computer-implemented method, comprising:

receiving application information that defines one or more traffic flows associated with one or more message types generated by an application program, including information identifying one or more points at which the application generates the traffic flows;

receiving, for a particular network device in a network that comprises a plurality of other heterogeneous network devices, device information that defines one or more quality of service treatments that the particular network device may apply to data processed by the particular network device;

based on the device information and the application information, determining one or more processing policies that associate the traffic flows with the quality of service treatments;

creating and storing one or more mappings of the application points to the quality of service treatments that may be used with the processing policies to generate the quality of service value when the application program generates traffic flows of one of the message types;

causing generation of the quality of service value, wherein the generation of the quality of service value is based on said one or more mappings and is performed before transmitting said traffic flows of one of the message types to said network;

enforcing one of the processing policies at the particular network device in response to receiving traffic from the application program that matches one of the traffic flows of the one of the message types.

2. A method as recited in claim 1, further comprising:

storing the mappings in a repository that is accessible by the application program;

storing both the application information and the device information in the repository; and

converting the mappings into one or more settings of the particular network device.

3. A method as recited in claim 1, further comprising:

creating and storing one or more classes that classify the traffic flows, each of the classes associated with one or more of the message types;

based on the device information and the classes of the traffic flows, determining one or more processing policies that associate the traffic flows with the quality of service treatments.

4. A method as recited in claim 1, wherein receiving application information comprises receiving one or more application code points that represent traffic flow types.

5. A method as recited in claim 2, wherein creating and storing one or more mappings comprises creating and storing one or more policies, concerning network processing of traffic flows generated by the application program, in a policy server coupled to a Lightweight Directory Access Protocol directory that comprises the repository.

6. A method as recited in claim 1, wherein determining one or more processing policies comprises creating and storing one or more policy statements in a repository, wherein each policy statement associates a condition of one of the traffic flows, an operator, an operand, and an action comprising one of the quality of service treatments.

7. A method as recited in claim 1, wherein each of the mappings comprises an application code point value stored in associated with a differentiated services code point value.

8. The method of claim 1, comprising:

converting the mappings into one or more messages to the particular network device that instruct the particular network device to apply Differentiated Services quality of service treatment in response to receiving traffic from the application program that matches the traffic flows;

wherein the step of converting the mappings is performed before transmitting said traffic flows of one of the message types to said network;

enforcing one of the processing policies at the particular network device in response to receiving traffic from the application program that matches the traffic flows of the one of the message types; and

wherein enforcing one of the processing policies comprises;

requesting, using an application QoS policy element that is coupled to the application program, an operating system function to modify a packet of the traffic flows using a policy element that requests a different operating system function according to an operating system then in use; and

at the particular network device, in response to receiving traffic from the application program that matches one of the traffic flows of the one of the message types and in response to the operating system function, modifying a portion of the packet to activate a quality of service treatment of the particular network device.

9. A computer-readable storage medium carrying one or more sequences of instructions which, when executed by one or more processors, cause the one or more processors to perform:

receiving application information that defines one or more traffic flows associated with one or more message types generated by the application program, including information identifying one or more points at which the application generates the traffic flows;

receiving, for a particular network device in a network that comprises a plurality of other heterogeneous network devices, device information that defines one or more quality of service treatments that the particular network device may apply to data processed by the particular network device;

based on the device information and the application information, determining one or more processing policies that associate the traffic flows with the quality of service treatments;

creating and storing one or more mappings of the application points to the quality of service treatments that may be used with the processing policies to generate the quality of service value when the application program generates traffic flows for one of the message types;

causing generation of the quality of service value, wherein the generation of the quality of service value is based on said one or more mappings and is performed before transmitting said traffic flows of one of the message types to said network;

enforcing one of the processing policies at the particular network device in response to receiving traffic from the application program that matches one of the traffic flows of the one of the message types.

10. A computer-readable storage medium as recited in claim 9, further comprising instructions for carrying out the steps of:

creating and storing one or more classes that classify the traffic flows, each of the classes associated with one or more of the message types;

based on the device information and the classes of the traffic flows, determining one or more processing policies that associate the traffic flows with the quality of service treatments.

11. A computer-readable storage medium as recited in claim 10, further comprising instructions for carrying out the steps of creating and storing one or more mappings by creating and storing, in the repository, one or more mappings of Application Code Points of the application program to one or more Differential Services Code Points of a protocol associated with the particular network device.

12. A computer-readable storage medium as recited in claim 9, further comprising instructions for carrying out the steps of determining one or more processing policies by creating and storing one or more policy statements in a repository, wherein each policy statement associates a condition of one of the traffic flows, an operator, an operand, and an action comprising one of the quality of service treatments.

13. An apparatus, comprising:

means for receiving application information that defines one or more traffic flows associated with one or more message types generated by the application program, including information identifying one or more points at which the application generates the traffic flows;

means for receiving, for a particular network device in a network that comprises a plurality of other heterogeneous network devices, device information that defines one or more quality of service treatments that the particular network device may apply to data processed by the particular network device;

means for determining, based on the device information and the application information, one or more processing policies that associate the traffic flows with the quality of service treatments;

means for creating and storing one or more mappings of the application points to the quality of service treatments that may be used with the processing policies to generate the quality of service value when the application program generates traffic flows for one of the message types;

means for causing generation of the quality of service value, wherein the generation of the quality of service value is based on said one or more mappings and is performed before transmitting said traffic flows of one of the message types to said network;

means for enforcing one of the processing policies at the particular network device in response to receiving traffic from the application program that matches one of the traffic flows of the one of the message types.

14. An apparatus as recited in claim 13, further comprising:

means for creating and storing one or more classes that classify the traffic flows, each of the classes associated with one or more of the message types;

means for determining, based on the device information and the classes of the traffic flows, one or more processing policies that associate the traffic flows with the quality of service treatments.

15. An apparatus as recited in claim 13, further comprising means for creating and storing, in the repository, one or more mappings of Application Code Points of the application program to one or more Differential Services Code Points of a protocol associated with the particular network device.

16. An apparatus as recited in claim 13, further comprising means for carrying out the steps of determining one or more processing policies by creating and storing one or more policy statements in a repository, wherein each policy statement associates a condition of one of the traffic flows, an operator, an operand, and an action comprising one of the quality of service treatments.

17. An apparatus, comprising:

a network interface that is communicatively coupled to a network for receiving packet flows therefrom;

one or more processors; and

a computer-readable medium carrying one or more sequences of instructions which, when executed by the one or more processors, cause the one or more processors to perform;

receiving application information that defines one or more traffic flows associated with one or more message types generated by an application program, including information identifying one or more points at which the application generates the traffic flows;

receiving, for a particular network device in the network, device information that defines one or more quality of service treatments that the particular network device may apply to data processed by the particular network device;

based on the device information and the application information, determining one or more processing policies that associate the traffic flows with the quality of service treatments;

creating and storing one or more mappings of the application points to the quality of service treatments that may be used with the processing policies to generate the quality of service value when the application program generates traffic flows of one of the message types;

causing generation of the quality of service value, wherein the generation of the quality of service value is based on said one or more mappings and is performed before transmitting said traffic flows of one of the message types to said network;

enforcing one of the processing policies at the particular network device in response to receiving traffic from the application program that matches the one or more of the traffic flows of the one of the message types.

18. An apparatus as recited in claim 17, further comprising one or more sequences of instructions which, when executed by the one or more processors, cause the one or more processors to perform:

storing the mappings in a repository that is accessible by the application program;

storing both the application information and the device information in the repository; and

converting the mappings into one or more settings of the particular network device.

19. An apparatus as recited in claim 17, further comprising one or more sequences of instructions which, when executed by the one or more processors, cause the one or more processors to perform:

creating and storing one or more classes that classify the traffic flows, each of the classes associated with one or more of the message types;

based on the device information and the classes of the traffic flows, determining one or more processing policies that associate the traffic flows with the quality of service treatments.

20. An apparatus as recited in claim 17, wherein the instructions that cause receiving application information comprise instructions that cause receiving one or more application code points that represent traffic flow types.

21. An apparatus as recited in claim 17, wherein the instructions for creating and storing one or more mappings comprise instructions for creating and storing one or more policies, concerning network processing of traffic flows generated by the application program, in a policy server coupled to a Lightweight Directory Access Protocol directory that comprises the repository.

22. An apparatus as recited in claim 17, wherein each of the mappings comprises an application code point value stored in associated with a differentiated services code point value.

23. An apparatus as recited in claim 17, further comprising instructions which when executed cause performing:

converting the mappings into one or more messages to the particular network device that instruct the particular network device to apply Differentiated Services quality of service treatment in response to receiving traffic from the application program that matches the traffic flows;

wherein the step of converting the mappings is performed before transmitting said traffic flows of one of the message types to said network;

enforcing one of the processing policies at the particular network device in response to receiving traffic from the application program that matches the traffic flows of the one of the message types; and

wherein enforcing one of the processing policies comprises;

requesting, using an application QoS policy element that is coupled to the application program, an operating system function to modify a packet of the traffic flows using a policy element that requests a different operating system function according to an operating system then in use; and

at the particular network device, in response to receiving traffic from the application program that matches one of the traffic flows of the one of the message types and in response to the operating system function, modifying a portion of the packet to activate a quality of service treatment of the particular network device.