ADAPTING CONTROL PLANE POLICING PARAMETERS DYNAMICALLY

• US 20170331747A1
• Filed: 05/12/2016
• Published: 11/16/2017
• Est. Priority Date: 05/12/2016
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Singh, Anand Kumar, Srinivasan, Venkatesh, Narayanan, Swaminathan, Chodey, Anulekha, Mehta, Ambrish Niranjan, Manthiramoorthy, Natarajan
• Granted Patent: US 10,153,977 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 47/20 Traffic policing
• CPC Class Codes: H04L 47/2466 using signalling traffic
• CPC Class Codes: H04L 47/323 Discarding or blocking control packets, e.g. ACK packets

Abstract

Aspects of the present disclosure are directed to dynamically adjusting control plane policing throughput of low (or lower) priority control plane traffic to permit higher throughput. The drop rate for low or lower priority control plane traffic can be determined to be above a threshold value. The processor utilization can be determined to be operating under normal utilization (or at a utilization within a threshold utilization value). The control plane policing for control plane traffic for the low or lower class of service can be increased (or decreased) to permit lower class of service control traffic to be transmitted using higher class of service resources without adjusting the priority levels for the lower class of service control traffic.

Claims

1. A method for dynamically adjusting a control plane policing parameter, the method comprising:

determining that a drop rate for control plane traffic for a first class of service traffic exceeds a predetermined threshold value;

determining that a utilization of control plane policing for any class of service traffic is within a utilization threshold value; and

adjusting the control plane policing throughput for control plane traffic for the first class of service.

2. The method of claim 1, wherein adjusting the control plane policing throughput for the first class of service traffic comprises maintaining the priority level for the control plane policing for the first class of traffic.

3. The method of claim 1, wherein adjusting the control plane policing throughput comprises adjusting the control plane policing to the minimum of a percent increase of a current throughput value or a maximum value.

4. The method of claim 1, wherein the first class of service traffic comprises a low priority traffic class of service.

5. The method of claim 1, further comprising determining whether to adjust the control plane policing throughput based on determining that the control plane policing throughput is less than a maximum throughput level.

6. The method of claim 1, further comprising receiving a packet drop rate for control plane packets of the first traffic class from an application specific integrated circuit (ASIC).

7. The method of claim 1, further comprising identifying one or more control plane policing parameters, the control plane parameters comprising one or more of an instant total inband packet processing, an instant inband packet processing for a class of service, an instant CPU utilization value, an instant packet drop rate for a class of service, or a current CoPP throughput;

and wherein adjusting the control plane policing throughput for control plane traffic for the first class of service comprises adjusting the control plane policing throughput for the control plane traffic of the first class of service based on the one or more control plane parameters.

8. The method of claim 1, wherein adjusting the control plane policing throughput for control plane traffic comprises increasing the throughput by a fixed percentage.

9. The method of claim 1, wherein adjusting the control plane policing throughput for control plane traffic for the first class of service comprises increasing the control plane policing throughput for control plane traffic for the first class of service.

10. An apparatus comprising:

a hardware processor configured to receive control plane packets from an application specific integrated circuit, the apparatus configured to;

determine that a drop rate for control plane traffic for a first class of service traffic exceeds a predetermined threshold value;

determine that a utilization of control plane policing for any class of service traffic is within a utilization threshold value; and

adjust the control plane policing throughput for control plane traffic for the first class of service.

11. The apparatus of claim 10, wherein adjusting the control plane policing throughput for the first class of service traffic comprises maintaining the priority level for the control plane policing for the first class of traffic.

12. The apparatus of claim 10, wherein adjusting the control plane policing throughput comprises adjusting the control plane policing to the minimum of a percent increase of a current throughput value or a maximum value.

13. The apparatus of claim 10, wherein the first class of service traffic comprises a low priority traffic class of service.

14. The apparatus of claim 10, the apparatus configured to determine whether to adjust the control plane policing throughput based on determining that the control plane policing throughput is less than a maximum throughput level.

15. The apparatus of claim 10, the apparatus configured to receive a packet drop rate for control plane packets of the first traffic class from an application specific integrated circuit (ASIC).

16. The apparatus of claim 10, wherein the apparatus is configured to identify one or more control plane policing parameters, the control plane parameters comprising one or more of an instant total inband packet processing, an instant inband packet processing for a class of service, an instant CPU utilization value, an instant packet drop rate for a class of service, or a current CoPP throughput, and wherein the apparatus is configured to adjust the control plane policing throughput for control plane traffic for the first class of service based on the one or more control plane parameters.

17. The method of claim 10, wherein adjusting the control plane policing throughput for control plane traffic for the first class of service comprises increasing the control plane policing throughput for control plane traffic for the first class of service.

18. A system comprising:

an application specific integrated circuit (ASIC) comprising hardware logic configured to;

receive a packet from a network location,

determine that the packet is a control plane packet, and

forward the packet based on a control plane policing setting; and

a central processing unit (CPU) subsystem comprising hardware processing logic configured to;

determine that a drop rate for control packets of a first class of service is above a threshold drop rate value;

determine that a processor utilization is within a threshold utilization value;

adjust the control plane policing setting for control plane packets of the first class of service; and

instruct the ASIC to forward the packet based on the adjusted control plane policing setting.

19. The system of claim 18, wherein the adjusting the control plane policing throughput comprises adjusting the control plane policing to the minimum of a percent increase of a current throughput value or a maximum value.

20. The system of claim 18, wherein the CPU subsystem is configured to adjust the control plane policing throughput for control plane traffic for the first class of service by increasing the control plane policing throughput for control plane traffic for the first class of service.