RECREATING ERRORS IN A NETWORK DEVICE

• US 20090282290A1
• Filed: 05/09/2008
• Published: 11/12/2009
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Viavi Solutions, Inc. (Lumentum Holdings Inc.)
• Original Assignee: Finisar Corporation (II-VI Incorporated)
• Inventors: Noble, Gayle L.
• Granted Patent: US 7,958,403 B2
• Time in Patent Office: Days
• US Class Current: 714/39
• CPC Class Codes: H04L 41/0681 Configuration of triggering conditions
• CPC Class Codes: H04L 43/18 Protocol analysers

Abstract

Recreating errors in a network device. In one embodiment, a method for recreating an error condition in a network device includes capturing a first set of commands sent to a network device; identifying an error condition in the network device, the error condition corresponding to the captured first set of commands; and sending a second set of commands to the network device in a second attempt to recreate the error condition. The second set of commands includes the first set of commands as well as additional commands that are configured to place the network device in substantially the same state as at the time that the first set of commands was sent to the network device.

Claims

1. A method for recreating an error condition in a network device, the method comprising the following acts:

capturing a first set of commands sent to a network device;

identifying an error condition in the network device, the error condition corresponding to the captured first set of commands;

sending a second set of commands to the network device in an attempt to recreate the error condition, wherein the second set of commands includes the first set of commands as well as additional commands that are configured to place the network device in substantially the same state as at the time that the first set of commands was sent to the network device.

2. The method as recited in claim 1, wherein the act of capturing a first set of commands sent to a network device comprises the act of employing a protocol analyzer to capture a sequence of commands sent to a network device.

3. The method as recited in claim 1, wherein the act of resending the first set of commands to the network device in a first attempt to recreate the error condition comprises the act of employing a packet maker to resend the first set of commands to the network device in a first attempt to recreate the error condition.

4. The method as recited in claim 1, wherein the first set of commands sent to a network device are formatted in one of the following protocols:

SSP, STP, SMP, SAS, SATA, or Fibre Channel.

5. The method as recited in claim 1, wherein the additional commands are configured to place a buffer of the network device in substantially the same state as at the time the first set of commands was sent to the network device.

6. The method as recited in claim 1, wherein the additional commands are configured to place the buffer of the network device in an overflow state.

7. The method as recited in claim 1, wherein the additional commands are configured to place the network device at substantially the same temperature as at the time the first set of commands was sent to the network device.

8. A method for recreating an error condition in a network device, the method comprising the following acts:

capturing a first set of commands sent to a network device;

identifying an error condition in the network device, the error condition corresponding to the captured first set of commands;

resending the first set of commands to the network device in a first attempt to recreate the error condition; and

sending a second set of commands to the network device in a second attempt to recreate the error condition,

wherein the second set of commands includes the first set of commands as well as additional commands that are configured to place the network device at substantially the same temperature as at the time that the first set of commands was sent to the network device.

9. The method as recited in claim 8, wherein the act of capturing a first set of commands sent to a network device further comprises the act of recording the temperature of the network device during the time that the first set of commands was sent to the network device.

10. The method as recited in claim 9, wherein the act of recording the temperature of the network device during the time that the first set of commands was sent to the network device comprises the act of employing a protocol analyzer to record the temperature of the network device during the time that the first set of commands was sent to the network device.

11. The method as recited in claim 8, wherein the act of capturing a first set of commands sent to a network device comprises the act of employing a protocol analyzer to capture a sequence of commands sent to a network device.

12. The method as recited in claim 8, wherein the act of resending the first set of commands to the network device in a first attempt to recreate the error condition comprises the act of employing a packet maker to resend the first set of commands to the network device in a first attempt to recreate the error condition.

13. The method as recited in claim 8, wherein the first set of commands sent to a network device are formatted in one of the following protocols:

SSP, STP, SMP, SAS, SATA, or Fibre Channel.

14. A computer program product comprising one or more computer-readable media having thereon computer-executable instructions that, when executed by one or more processors of a computer, causes the computer to perform a method for recreating an error condition in a network device, the method comprising the following act of:

capturing a first set of commands sent to a network device;

identifying an error condition in the network device, the error condition corresponding to the captured first set of commands;

resending the first set of commands to the network device in a first attempt to recreate the error condition; and

sending a second set of commands to the network device in a second attempt to recreate the error condition,

wherein the second set of commands includes the first set of commands as well as additional commands that are configured to place a buffer of the network device in substantially the same state as at the time that the first set of commands was sent to the network device.

15. The computer program product as recited in claim 14, wherein the act of capturing a first set of commands sent to a network device comprises the act of employing a protocol analyzer to capture a sequence of commands sent to a network device.

16. The computer program product as recited in claim 14, wherein the act of resending the first set of commands to the network device in a first attempt to recreate the error condition comprises the act of employing a packet maker to resend the first set of commands to the network device in a first attempt to recreate the error condition.

17. The computer program product as recited in claim 14, wherein the first set of commands sent to a network device are formatted in one of the following protocols:

SSP, STP, SMP, SAS, SATA, or Fibre Channel.

18. The computer program product as recited in claim 14, wherein the additional commands are configured to place the buffer of the network device in an overflow state.

19. The computer program product as recited in claim 14, wherein the additional commands comprise wait commands interleaved in the first set of commands.

20. The computer program product as recited in claim 14, wherein the additional commands comprise a stream of write commands of sufficient size to cause the buffer of the network device to overflow.