Quality of service with control flow packet filtering

• US 7,876,759 B2
• Filed: 07/11/2007
• Issued: 01/25/2011
• Est. Priority Date: 07/11/2007
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Norden, Hahn Vo, Chin, Kenneth T., Matthews, David L., Dinh, James, Brinkmann, Hubert E., Riley, Dwight D., Brownell, Paul V.
• Primary Examiner(s): Vu; Thong H
• Application Number:
  US11/775,967
• Publication Number:
  US 20090016348A1
• Time in Patent Office: 1,294 Days
• Field of Search: 370/352, 370/235, 370/237, 370/394, 370/332, 370/354, 370/223, 370/401, 455/411, 455/556, 709/238, 709/224, 709/226
• US Class Current: 370/392
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04L 47/39 Credit based

Abstract

A system is provided comprising a fabric coupling together a plurality of computing devices, wherein the fabric transfers a stream of packets between the computing devices. Each computing device comprises a Quality of Service (“QOS”) filter that monitors incoming packets to filter out packets of a maintenance type and permit transfer of packets of a transaction type.

Claims

1. A system, comprising:

a fabric coupling together a plurality of computing devices, wherein the fabric transfers a stream of packets between the computing devices;

each computing device comprising;

a Quality of Service (“

QOS”

) filter that monitors incoming packets to filter out packets of a maintenance type and permit transfer of packets of a transaction type.

2. The system according to claim 1, wherein packets of the maintenance type comprise at least one of 1) flow control type packets and 2) configuration type packets.

3. The system according to claim 2, each computing device further comprising a network configuration module that processes configuration type packets;

and wherein the QOS filter redirects packets of the maintenance type to the network configuration module when the packets comprise configuration type packets.

4. The system according to claim 2, each computing device further comprising a regulator that determines the rate at which allocated flow control credits are consumed;

and wherein the QOS filter redirects packets of the maintenance type to the regulator when the packets comprise flow control type packets.

5. The system according to claim 4, wherein the regulator assigns a predetermined amount of flow control credit for the device;

and when predetermined amount of flow control credit is not consumed and returned, the regulator reallocates at least some of the predetermined amount of flow control credit to another computing device.

6. The system according to claim 1, each computing device further comprising a decapsulator that decapsulates transaction type packets for processing at the device;

and wherein the QOS filter permits transfer of transaction type packets.

7. The system according to claim 1, wherein the QOS filter intercepts a packet in the stream of packets and examines the header of the packet to determine the type of the packet.

8. The system according to claim 1, wherein the QOS filter performs error correction.

9. A filtering apparatus, comprising:

means for monitoring a stream of packets between a plurality of computing devices by a fabric;

means for filtering out packets of a maintenance type; and

means for permitting transfer of packets of a transaction type.

10. The filtering apparatus according to claim 9, further comprising means for examining a header each packet in the stream of packets to determine the type of each packet.

11. The filtering apparatus according to claim 9, wherein packets of the maintenance type comprise at least one of 1) flow control type packets and 2) configuration type packets.

12. The filtering apparatus according to claim 11, further comprising means for redirecting packets of the maintenance type to the network configuration module when the packets comprise configuration type packets, and processing configuration type packets.

13. The filtering apparatus according to claim 11, further comprising means for redirecting packets of the maintenance type to the regulator when the packets comprise flow control type packets and determining the rate at which allocated flow control credits are consumed.

14. The filtering apparatus according to claim 9, further comprising

means for assigning a predetermined amount of flow control credit;

and

means for reallocating at least some of the predetermined amount of flow control credit to another computing device when predetermined amount of flow control credit is not consumed and returned.

15. The filtering apparatus according to claim 9, further comprising means for permitting transfer of transaction type packets and decapsulating transaction type packets for processing.

16. A method, comprising:

transferring a stream of packets between a plurality of computing devices by a fabric;

monitoring the stream of incoming packets;

filtering out packets of a maintenance type; and

permitting transfer of packets of a transaction type.

17. The method according to claim 16, wherein monitoring the stream of incoming packets further comprises examining a header each packet in the stream of packets to determine the type of each packet.

18. The method according to claim 16, wherein packets of the maintenance type comprise at least one of 1) flow control type packets and 2) configuration type packets.

19. The method according to claim 18, further comprising redirecting packets of the maintenance type to the network configuration module when the packets comprise configuration type packets, and processing configuration type packets.

20. The method according to claim 18, further comprising redirecting packets of the maintenance type to the regulator when the packets comprise flow control type packets and determining the rate at which allocated flow control credits are consumed.

21. The method according to claim 16, further comprising permitting transfer of transaction type packets and decapsulating transaction type packets for processing.

22. The method according to claim 16, performing error correction.

23. The method according to claim 16, further comprising:

assigning a predetermined amount of flow control credit; and

when predetermined amount of flow control credit is not consumed and returned, reallocating at least some of the predetermined amount of flow control credit to another computing device.