Method and apparatus for obtaining multiple port addresses by a fibre channel from a network fabric

• US 7,512,133 B2
• Filed: 12/03/2001
• Issued: 03/31/2009
• Est. Priority Date: 12/03/2001
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Frazier, Giles R., Dugan, Robert J.
• Primary Examiner(s): Mattis; Jason E
• Application Number:
  US10/006,948
• Publication Number:
  US 20030103504A1
• Time in Patent Office: 2,675 Days
• Field of Search: 370/392, 370/395.3, 370/419
• US Class Current: 370/395.3
• CPC Class Codes: H04L 49/30 Peripheral units, e.g. input or output ports
• CPC Class Codes: H04L 49/357 Fibre channel switches
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]

Abstract

A method, apparatus and program product for assigning or confirming multiple address identifications to a single channel adapter. A server contains multiple partitions connected to a single channel adapter which is used to send data and commands to a fabric. A request is sent to the fabric on behalf of each of the partitions, and the fabric assigns or confirms and returns to the adapter, an address identification associated to each partition on whose behalf the request was sent. The assigned or confirmed address is used to communicate between controllers connected to the fabric and the associated partition through the same channel adapter.

Claims

1. In a data processing network having a server, multiple partitions, a fabric, and a channel adapter communicating between the partitions and the fabric, a method of assigning addresses to the channel adapter comprising:

sending multiple requests from the channel adapter to the fabric for address identifications to be assigned to a respective partition identified by a world-wide unique partition identifier, each request sent on behalf of a respective one of said partitions;

assigning a unique address identification by the fabric in response to each request, each address identification being associated with the respective partition on whose behalf the request was sent for effecting communication with the respective partition, said assigned address identification being previously unknown to the respective partition;

storing in a table in the fabric, the world-wide unique partition identifiers and their corresponding addresses; and

returning the assigned address identification for each request, such that when a message is sent from the fabric to a partition via said channel adapter the sender of the message sees multiple channels adapters corresponding to said multiple partitions and wherein multiple addresses are assigned to the same channel adapter as assigned for said multiple partitions.

2. The method of claim 1 further comprising establishing the table in the fabric responsive to the first request.

3. The method of claim 1 wherein the table is stored in a name server in the fabric.

4. The method of claim 1 further comprising:

sending a proposed address to the fabric with a request, and

confirming by the fabric that the proposed address has already been assigned to the same partition.

5. The method of claim 1 further comprising:

sending an updated address to the fabric with a request, and

updating by the fabric, the stored address associated with the partition on whose behalf the request was sent with said updated address.