Switching device having ports that utilize independently sized buffering queues

• US 10,404,575 B2
• Filed: 09/25/2017
• Issued: 09/03/2019
• Est. Priority Date: 09/25/2017
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Inventors: McDonald, Nicholas, Davis, Alan
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US15/715,026
• Publication Number:
  US 20190097915A1
• Time in Patent Office: 708 Days
• CPC Class Codes: H04L 45/122 by minimising distances, e.g. by selecting a route with minimum of number of hops
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/39 Credit based
• CPC Class Codes: H04L 49/109 Integrated on microchip, e.g. switch-on-chip
• CPC Class Codes: H04L 49/15 Interconnection of switching modules
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04Q 11/0003 Details

Abstract

A switching device comprising a substrate and multiple switches connected to the substrate to provide a switching function. Each of the multiple switches includes a plurality of ports that each utilize a corresponding connection to another switch or to an external device. Each of the ports of each switch are associated with an independently sized buffering queue, with a buffering queue size of at least a first port being different than a buffering queue size of a second port.

Claims

1. A switching device comprising:

a substrate; and

multiple switches connected on the substrate to provide a switching function,

wherein each respective switch of the multiple switches includes a plurality of ports that utilize a corresponding connection to another switch or to an external device, and wherein the plurality of ports of the respective switch are associated with independently sized buffering queues, wherein a size of a first buffering queue for a first port of the respective switch is different from a size of a second buffering queue for a second port of the respective switch, the size of the first buffering queue being based on the first port being a first type of port, and the size of the second buffering queue being based on the second port being a second type of port different from the first type of port.

2. The switching device of claim 1, wherein a first switch of the multiple switches includes an external port that utilizes a corresponding connection to connect to an external device, and an internal port that utilizes a corresponding connection to connect to an internal port of a second switch of the multiple switches, wherein the external port of the first switch is associated with a buffering queue with a size different from a size of a buffering queue associated with the internal port of the first switch.

3. The switching device of claim 2, wherein the first switch directly connects to an input buffering queue of the second switch.

4. The switching device of claim 2, wherein the size of the buffering queue associated with the internal port of the first switch is less than the size of the buffering queue associated with the external port of the first switch.

5. The switching device of claim 1, wherein the first buffering queue is sized to accommodate a flow of data packets from a remote location.

6. The switching device of claim 1, wherein the substrate is a die or a chip.

7. The switching device of claim 1, wherein the substrate is an interposer.

8. The switching device of claim 1, wherein the substrate is a printed circuit board.

9. The switching device of claim 1, wherein the substrate includes an optical connection to an external device or between individual switches of the multiple switches.

10. The switching device of claim 1, wherein the substrate includes an electrical connection to an external device or between individual switches of the multiple switches.

11. The switching device of claim 1, wherein a first switch of the multiple switches includes a port with a connection to an electrical medium, and a port with a connection to an optical medium, and wherein the first switch includes a first buffering queue associated with the port with the connection to the electrical medium, and a second buffering queue associated with the port with the connection to the optical medium, the first and second buffering queues of the first switch having different sizes dependent upon respective different media of the electrical medium and the optical medium to which the ports of the first switch are connected.

12. A switching device comprising:

multiple substrates; and

multiple switches provided on the multiple substrates,

wherein a first switch of the multiple switches includes a plurality of ports that utilize corresponding connections to another switch or to an external device, and wherein the plurality of ports are associated with independently sized buffering queues comprising a first buffering queue for a first port of the plurality of ports, and a second buffering queue for a second port of the plurality of ports, wherein a first size of the first buffering queue is based on the first port being of a first type of port, and a second size of the second buffering queue is based on the second port being of a second type of port different from the first type of port, the first size different from the second size.

13. The switching device of claim 12, wherein an accounting of credit returns for a particular output port of the plurality of ports is associated to credits for a connecting input port of the plurality of ports and a buffering queue of the connecting input port.

14. The switching device of claim 13, wherein the first port is an external input port that utilizes the corresponding connection to connect to the external device, and the second port an internal output port that utilizes a corresponding connection to connect to an internal input port of a second switch of the multiple switches.

15. The switching device of claim 14, wherein the connection that connects the internal input port of the second switch to the internal output port of the first switch is one of an electrical or optical connection.

16. The switching device of claim 14, wherein the first size is larger than the second size.

17. The switching device of claim 12, wherein a second switch of the multiple switches comprises a third port and a fourth port, the third port to connect to an electrical medium, and the fourth port to connect to an optical medium, and the second switch comprising a third buffering queue having a third size based on the third port being connected to the electrical medium, and a fourth buffering queue having a fourth size based on the fourth port being connected to the optical medium, the third size being different from the fourth size.

18. A method for creating a switching device, the method comprising:

forming multiple switches on a substrate, the multiple switches being interconnected to enable a switching function; and

configuring individual ports of a first switch of the multiple switches to include individually sized buffering queues, wherein a size of a first buffering queue of a first port of the ports is different from a size of a second buffering queue of a second port of the ports, the size of the first buffering queue being based on the first port being a first type of port, and the size of the second buffering queue being based on the second port being a second type of port different from the first type of port.

19. The method of claim 18, wherein the first port is an external port to connect to an external device, and the second port is an internal port to connect to another switch of the switching device.

20. The method of claim 18, wherein the multiple switches are formed on a die.