SWITCHING MODULE

• US 20120113822A1
• Filed: 10/06/2011
• Published: 05/10/2012
• Est. Priority Date: 05/06/2005
• Status: Active Grant

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Letner, Bernard J., Twigg, Kenneth R.
• Granted Patent: US 8,854,980 B2
• Time in Patent Office: Days
• US Class Current: 370/250
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 43/04 Processing captured monitoring data, e.g. for logfile generation
• CPC Class Codes: H04L 43/0823 Errors, e.g. transmission errors
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04L 49/101 using crossbar or matrix
• CPC Class Codes: H04L 49/357 Fibre channel switches
• CPC Class Codes: H04L 49/55 Prevention, detection or correction of errors
• CPC Class Codes: H04L 49/555 Error detection

Abstract

A fiber channel switching module can include an integrated trace buffer memory, a crossbar switch and a control processor disposed on a single line replaceable module (LRM). The trace buffer memory may be adapted to capture selected data traffic transiting the switch fabric based on pre-selected triggers. The selected data can be read out of the trace buffer memory and used for selected diagnostics.

Claims

1. A fiber channel switch line replaceable module comprising:

an embedded trace buffer memory disposed on the line replaceable module;

a fabric crossbar constituted by a programmable logic device configured as a fabric crossbar, disposed on the line replaceable module and coupled to the embedded trace buffer memory; and

a processor disposed on the line replaceable module and coupled to the fabric crossbar,

the fabric crossbar including a network level monitoring section having simultaneous access to traffic flowing among all nodes connected to the fiber channel switch, the monitoring section being configured to monitor network traffic and to detect a trigger event in network traffic between a first node and a second node, in response to detection of the trigger event, to capture data from network traffic between a third node and fourth node, the first, second, third, and fourth nodes all being different than each other.

2. The fiber channel switch line replaceable module of claim 1, wherein the monitoring section is configured to monitor network traffic based on monitoring parameters.

3. The fiber channel switch line replaceable module of claim 2, wherein the line replaceable module is further configured to change the monitoring parameters by reading and processing a fiber channel message sent to a well-known address of the fiber channel switch.

4. The fiber channel switch line replaceable module of claim 3, wherein the line replaceable module is configured to be installed on an aircraft.

5. The fiber channel switch line replaceable module of claim 4, wherein the fiber channel message for changing monitoring parameters can be received and processed while the aircraft is in flight and the monitoring parameters can be dynamically updated while the aircraft is in flight.

19. The fiber channel switch line replaceable module of claim 1, wherein the trigger event includes a combination of events.

20. The fiber channel switch line replaceable module of claim 19, wherein the combination of events includes a first event that is message label dependent and a second event that is message label independent.

6. A communications system comprising:

a first fiber channel switch line replaceable module including;

a first embedded trace buffer memory disposed on the first fiber channel switch line replaceable module;

a first fabric crossbar constituted by a programmable logic device configured as a fabric crossbar, disposed on the first fiber channel switch line replaceable module and coupled to the first embedded trace buffer memory; and

a first processor disposed on the first fiber channel switch line replaceable module and coupled to the first fabric crossbar,

the first fabric crossbar including a network-level monitoring section having simultaneous access to traffic flowing among all nodes connected to the first fiber channel switch line replaceable module, the monitoring section being configured to monitor network traffic and to detect a trigger event in network traffic and, in response to detection of the trigger event, to capture data from network traffic,

a second fiber channel switch line replaceable module including;

a second embedded trace buffer memory disposed on the second fiber channel switch line replaceable module;

a second fabric crossbar constituted by a programmable logic device configured as a fabric crossbar, disposed on the second fiber channel switch line replaceable module and coupled to the second embedded trace buffer memory; and

a second processor disposed on the second fiber channel switch line replaceable module and coupled to the second fabric crossbar,

the second fabric crossbar including a network level monitoring section having simultaneous access to traffic flowing among all nodes connected to the second fiber channel switch line replaceable module, the monitoring section being configured to monitor network traffic and to detect a trigger event in network traffic and, in response to detection of the trigger event, to capture data from network traffic,

the system being configured to utilize the second fiber channel switch line replaceable module as a redundant replacement for the first fiber channel switch line replaceable module, and, in the event of a failure of the first fiber channel switch line replaceable module, the second fiber channel switch line replaceable module is made to operate as the main fiber channel switch line replaceable module and provides continuous network-level monitoring of network traffic.

7. The communications system of claim 6, wherein the first monitoring section and the second monitoring section are both configured to monitor network traffic based on monitoring parameters.

8. The communications system of claim 7, wherein the first line replaceable module and the second line replaceable module are both further configured to change the monitoring parameters by reading and processing a fiber channel message sent to a well-known address of the first fiber channel switch and second fiber channel switch, respectively.

9. The communications system of claim 8, wherein the first and second fiber channel switch line replaceable modules are configured to be installed on an aircraft.

10. The communications system of claim 9, wherein the fiber channel message for changing monitoring parameters can be received and processed while the aircraft is in flight and the monitoring parameters can be dynamically updated while the aircraft is in flight.

11. A method for network-level monitoring of data on an aircraft, the method comprising:

providing a trace buffer memory on a fiber channel switch line replaceable module, the trace buffer memory being coupled to a fabric crossbar;

providing a trace buffer memory controller on the fiber channel switch line replaceable module;

programming the trace buffer memory controller with monitoring parameters including one or more triggers adapted to cause the trace buffer memory to capture selected data from network traffic data flowing through the optical backplane, the trace buffer memory controller being adapted to simultaneously monitor traffic flowing to and from each node connected to the fiber channel switch line replaceable module; and

monitoring network traffic of a first node and detecting a trigger event in the network traffic of the first node and, in response to detection of the trigger event, capturing data from network traffic of a second node, the second node being different than the first node.

12. The method of claim 11, further comprising changing the monitoring parameters by reading and processing a fiber channel message sent to a well-known address of the fiber channel switch.

13. The method of claim 12, further comprising:

receiving and processing the fiber channel message to change monitoring parameters while the aircraft is in flight; and

dynamically updating the monitoring parameters while the aircraft is in flight.

14. The method of claim 13, further comprising providing access to captured data.

15. The method of claim 14, further comprising automatically transferring captured data to an external storage device when preselected criteria are met.

16. The method of claim 15, wherein the preselected criteria include the trace buffer memory approaching capacity.

17. The method of claim 11, wherein the trigger event includes a combination of events.

18. The method of claim 17, wherein the combination of events includes a first event that is message label dependent and a second event that is message label independent.