Supporting mapping of layer 3 priorities in an infiniband ™ network

• US 6,459,698 B1
• Filed: 06/18/2001
• Issued: 10/01/2002
• Est. Priority Date: 06/18/2001
• Status: Active Grant

• Current Assignee: Advanced Micro Devices, Inc.
• Original Assignee: Advanced Micro Devices, Inc.
• Inventors: Acharya, Yatin R.
• Primary Examiner(s): LUTHER, WILLIAM A
• Application Number:
  US09/881,849
• Time in Patent Office: 470 Days
• Field of Search: 370/356, 370/389, 370/395.31, 370/395.42, 370/395.43, 370/395.5, 370/401, 370/402, 370/466, 370/467, 370/469, 370/471, 370/474, 370/903, 370/908, 370/911-912, 370/902, 370/392, 709/234, 709/238-244, 711/221, 711/200, 711/202-203
• US Class Current: 370/392
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/302 Route determination based on requested QoS
• CPC Class Codes: H04L 47/2408 for supporting different services, e.g. a differentiated services [DiffServ] type of service
• CPC Class Codes: H04L 47/2491 Mapping quality of service [QoS] requirements between different networks
• CPC Class Codes: H04L 47/39 Credit based
• CPC Class Codes: H04L 49/35 Switches specially adapted for specific applications
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/169 Special adaptations of TCP, UDP or IP for interworking of IP based networks with other networks protocols for interworking, protocol conversion H04L69/08
• CPC Class Codes: Y10S 370/911 Bridge, e.g. brouter, bus extender

Abstract

A router is configured for sending and receiving data packets on an InfiniBand™ network and acts as a bridge between an IP network and the InfiniBand™ network. The router is configured to receive an Internet Protocol (IP) data packet having an IP header including a type of service (TOS) field having a differentiated services code point indicative of layer 3 priority data of the IP packet . The router includes a mapping table having multiple entries, each entry specifying a differentiated services code point and a corresponding service level. The controller is configured for parsing the TOS field and determining the service level for the differentiated services level. The controller outputs the IP packet on the InfiniBand™ network within an InfiniBand™ packet according to the determined services level.

Claims

1. A router configured for sending and receiving data packets on an InfiniBand™

network, the router being configured to receive an Internet Protocol (IP) data packet having an IP header including a type of service (TOS) field having a differentiated services code point value indicative of layer 3 priority data of the IP packet, the router comprising;

a mapping table having multiple entries, each entry specifying a differentiated services code point value and a corresponding service level, and

a controller configured for parsing the TOS field and determining the service level for the differentiated services code point value, the controller outputting the IP packet on the InfiniBand™

network within an InfiniBand™

packet according to the determined service level.

2. The router of claim 1, further including a host channel adapter configured for generating the InfiniBand™

packet based on a request from the controller.

3. The router of claim 2, wherein the host channel adapter includes a service level to virtual lane mapping table configured for assigning the InfiniBand™

packet to a prescribed virtual lane based on the determined service level specified in the request.

4. A method of outputting an IP packet, received by a router, onto an InfiniBand™

network, the method comprising;

receiving, by the router, an Internet Protocol (IP) data packet having an IP header including a type of service (TOS) field specifying a differentiated services code point value;

parsing the TOS field and mapping the differentiated services code point value to a determined service level based on the parsed TOS field; and

outputting the IP packet on the InfiniBand™

network within an InfiniBand™

packet according to the determined service level.

5. The method of claim 4, further including, prior to outputting step, the step of mapping the service level to a virtual lane and establishing an InfiniBand™

packet header including a virtual lane field that contains priority data relating to the priority data of the IP packet.

6. The method of claim 4, wherein, prior to the parsing step, the method includes populating within the router a differential services code point to service level mapping table with differential service code point values and corresponding service level numbers.

7. A router configured for sending and receiving data packets on an InfiniBand™

network, the router being configured to receive an Internet Protocol (IP) data packet having an IP header including a type of service (TOS) field having a differentiated services code point value indicative of layer 3 priority data of the IP packet, the router comprising;

means for a mapping a differentiated services code point value to a corresponding service level, and

means for parsing the TOS field and determining the service level for the differentiated services code point value, and for outputting the IP packet on the InfiniBand™

network within an InfiniBand™

packet according to the determined service level.

8. The router of claim 7, wherein the means for mapping is a mapping table having multiple entries, each entry specifying a differentiated services code point value and a corresponding service level.

9. The router of claim 7, wherein the means for parsing is a controller.

10. The router of claim 9, further including a host channel adapter configured for generating the InfiniBand™

packet based on a request from the controller.

11. The router of claim 10, wherein the host channel adapter includes a service level to virtual lane mapping table configured for assigning the InfiniBand™

packet to a prescribed virtual lane based on the determined service level specified in the request.