Method and system for obtaining logical performance data for a circuit in a data network

• US 7,391,734 B2
• Filed: 01/21/2003
• Issued: 06/24/2008
• Est. Priority Date: 01/21/2003
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: June, Thad, Taylor, William Scott
• Primary Examiner(s): Yao; Kwang B.
• Assistant Examiner(s): Lai; Andrew
• Application Number:
  US10/348,077
• Publication Number:
  US 20040141464A1
• Time in Patent Office: 1,981 Days
• Field of Search: 370/241, 370/242, 370/252, 370/244, 714/4, 709/201, 379/9.04
• US Class Current: 370/242
• CPC Class Codes: H04L 41/5003 Managing SLA; Interaction between SLA and QoS
• CPC Class Codes: H04L 41/5054 Automatic deployment of services triggered by the service manager, e.g. service implementation by automatic configuration of network components
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/0894 Packet rate

Abstract

A method and system are provided for obtaining logical performance data for a network circuit in a data network. The network circuit includes both a logical circuit and a physical circuit. A legacy physical element module sends a request for logical performance data to a logical element module through a network management module in communication with the legacy physical element module and the legacy physical element module. Based on the request, the logical element module retrieves the logical performance data from one or more network devices in the network and transmits the data to the legacy physical element module through the network management module. Upon receiving the logical performance data, the legacy physical element module uses the performance data to troubleshoot the physical circuit. The network device may be a switch. The circuit may be a frame relay circuit or an ATM circuit.

Claims

1. A method for obtaining logical performance data for a network circuit in a data network, comprising:

obtaining logical performance data for the network circuit at a network management module, wherein the network circuit comprises a physical circuit and logical circuit and wherein the logical performance data comprises a frame size, a frame rate, and at least one of a green, red, and yellow octet condition for the logical circuit;

based on the logical performance data, determining whether data frames are being transmitted over the network circuit and determining whether the logical performance data may be used to troubleshoot the network circuit without unnecessarily taking the network circuit out of service by determining whether the logical performance data includes red octets or green octets;

if it is determined that the logical performance data includes red octets, then determining that the logical circuit is communicating the data frames above a Committed Information Rate (CIR), determining that the logical circuit is congested, and communicating the logical performance data to a physical element module for testing of the physical circuit by taking the network service out of service; and

if it is determined that the logical performance data includes green octets, then determining that the physical element module can not safely test the network circuit by taking it out of service.

2. The method of claim 1, wherein the physical circuit comprises a physical path for the network circuit in the data network.

3. The method of claim 1, wherein the logical circuit comprises data describing a logical data path for the network circuit in the data network.

4. The method of claim 1, wherein the logical performance data includes errored packets.

5. The method of claim 1, wherein the logical performance data includes discarded eligible frames.

6. The method of claim 1, wherein the logical performance data includes current octet rate.

7. The method of claim 1, wherein the logical performance data includes maximum octet rate.

8. The method of claim 1, wherein the logical performance data includes minimum octet rate.

9. A system for obtaining logical performance data for a network circuit in a data network, comprising:

at least one network device having access to logical performance data for the network circuit, wherein the network circuit includes a logical circuit and a physical circuit, the logical performance data comprising a frame size, a frame rate, and at least one of a green, red, and yellow octet condition for the logical circuit;

a logical element module, in communication with the at least one network device, for retrieving the logical performance data;

a network management module for receiving the logical performance data from the logical element module operative to;

determine whether the logical performance data may be used to troubleshoot the network circuit without unnecessarily taking the network circuit out of service by determining whether the logical performance data includes red octets or green octets,

if it is determined that the logical performance data includes red octets, then determine that the logical circuit is communicating data above a Committed Information Rate (CIR), determining that the logical circuit is congested, and communicate the logical performance data for testing of the physical circuit, wherein the physical circuit is tested by taking the network circuit out of service, and

if it is determined that the logical performance data includes green octets, then determine that the network circuit can not be safely tested by taking the network circuit out of service; and

a physical element module operative to;

send a request to the network management module for the logical performance data,

receive the logical performance data from the network management module based on the logical performaance data, test the physical circuit by taking the network circuit out of service.

10. The system of claim 9, further comprising a test module, in communication with the physical element module, for accessing a test point in the at least one network device to troubleshoot the physical circuit.

11. The system of claim 9, wherein the network device is a switch.

12. The system of claim 9, wherein the network circuit is a frame relay circuit.

13. The system of claim 9, wherein the network circuit is an ATM circuit.

14. The system of claim 9, wherein the logical performance data includes errored packets.

15. The system of claim 9, wherein the logical performance data includes discarded eligible frames.

16. The system of claim 9, wherein the logical performance data includes current octet rate.

17. The system of claim 9, wherein the logical performance data includes maximum octet rate.

18. The system of claim 9, wherein the logical performance data includes minimum octet rate.

19. The system of claim 9, wherein the logical element module, the network management module, and the physical element module communicate with each other using script files containing sets of commands and responses through a Common Object Request Broker Architecture (CORBA) interface.