APPARATUS AND METHOD FOR DEFINING A STATIC FIBRE CHANNEL FABRIC

• US 20090327518A1
• Filed: 09/08/2009
• Published: 12/31/2009
• Est. Priority Date: 04/05/2002
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: DeSanti, Claudio, Di Benedetto, Marco
• Granted Patent: US 8,098,595 B2
• Time in Patent Office: Days
• US Class Current: 709/238
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
• CPC Class Codes: H04L 41/0803 Configuration setting
• CPC Class Codes: H04L 41/0879 Manual configuration through operator
• 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

Abstract

A storage area network and method for defining a static Fibre Channel Fabric that does not require a Principal Switch. The storage area network comprises one or more hosts, one or more storage devices, and a static Fabric connecting the one or more hosts and storage devices. Within the static Fabric, the Switches have their Domain_ID and Fabric_Name statically set. The method comprises accessing the Fabric, selecting a Switch in the Fabric, and statically configuring the Domain_ID and Fabric_Name for the selected Switch. The above sequence is repeated for each Switch in the static Fabric. In one embodiment, after being statically configured, the Switch is isolated from any dynamically set Switches in the Fabric. The Switch detects which of its Ports are connected to dynamically set Switches, and then isolates them, while maintaining operational the Ports connected to statically configured Switches.

Claims

1. A method, comprising:

receiving a request from a first host to access a fibre channel fabric,

wherein the fibre channel fabric connects a plurality of hosts and a plurality of storage devices;

transmitting to a first switch of the fibre channel fabric a message or messages from the first host comprising fabric name information and domain name information,

wherein the first switch is statically configured using the fabric name and the domain name information, and

wherein after being statically configured, the first switch isolates itself from a second switch included in the fibre channel fabric upon determining that the second switch was dynamically configured.

2. The method of claim 1, wherein a domain manager of the first switch is disabled either before or after the first switch is statically configured.

3. The method of claim 1, further comprising assigning fibre channel identifiers to an end device connected to the first switch after the fabric name and the domain name information are written into memory of the first switch.

4. The method of claim 1, wherein the request to access the fibre channel fabric is sent by a user through a command line interpreter or other method of accessing the fibre channel fabric.

5. A method, comprising:

at a statically configured first switch of a fibre channel fabric, determining that a second switch connected to the first switch was dynamically configured, the second switch included in the fibre channel fabric,

wherein determining the second switch was dynamically configured is based at least in part on receiving a first message from the second switch;

isolating the first switch from the second switch upon determining that the second switch was dynamically configured.

6. The method of claim 5, wherein the first message comprises a message relating to domain name or fabric name assignment.

7. The method of claim 5, further comprising:

receiving a message to enable a domain manager; and

enabling the domain manager,

wherein enabling the domain manager results in dynamic configuration of the first switch.

8. The method of claim 7, wherein after the first switch has enabled the domain manager, ports of the first switch are able to communicate with dynamically configured switches in the fibre channel fabric.

9. The method of claim 5, wherein isolating the first switch from the second switch comprises preventing data traffic or protocol units from being sent between the first switch and the second switch except at least messages relating to restoring communications between the first switch and the second switch.

10. A system, comprising:

one or more hosts;

one or more storage devices; and

a fabric connecting the one or more hosts and storage devices, the fabric having a plurality of switches being configured by a process comprising;

at the fabric, receiving a request from one of the hosts to access the fabric;

at a first switch of the fabric, receiving a message or messages from the host comprising domain name and fabric name information, the domain name and fabric name information being used to configure the first switch,

wherein after being statically configured, the first switch isolates itself from a second switch included in the fibre channel fabric upon determining that the second switch was dynamically configured.

11. The system of claim 10, wherein a domain manager of the first switch is disabled either before or after the first switch is statically configured.

12. The system of claim 10, further comprising assigning fibre channel identifiers to an end device connected to the first switch after the fabric name and the domain name information are written into memory of the first switch.

13. An apparatus, comprising:

a processor at a statically configured first switch of a fibre channel fabric operable to determine a second switch connected to the first switch was dynamically configured, the second switch included in the fibre channel fabric,

wherein the first switch is isolated from the second switch upon determining that the second switch was dynamically configured, and

wherein determining the second switch was dynamically configured is based at least in part on receiving a first message from the second switch.

14. The apparatus of claim 13, wherein the first message comprises a message relating to domain name or fabric name assignment.

15. The apparatus of claim 13, further comprising an interface operable to receive a message to enable a domain manager;

and

wherein the processor is further operable to enable the domain manager,

wherein enabling the domain manager results in dynamic configuration of the first switch.

16. The apparatus of claim 13, wherein after the first switch has enabled the domain manager, ports of the first switch are able to communicate with dynamically configured switches in the fibre channel fabric.

17. The apparatus of claim 13, wherein isolating the first switch from the second switch comprises preventing data traffic or protocol units from being sent between the first switch and the second switch except at least messages relating to restoring communications between the first switch and the second switch.

18. At least one computer readable storage medium having computer program instructions stored thereon that are arranged to perform the following operations:

receiving a request from a first host to access a fibre channel fabric,

wherein the fibre channel fabric connects a plurality of hosts and a plurality of storage devices;

transmitting to a first switch of the fibre channel fabric a message or messages from the first host comprising fabric name information and domain name information,

wherein the first switch is statically configured using the fabric name and the domain name information, and

wherein after being statically configured, the first switch isolates itself from a second switch included in the fibre channel fabric upon determining that the second switch was dynamically configured.

19. At least one computer readable storage medium having computer program instructions stored thereon that are arranged to perform the following operations:

at a statically configured first switch of a fibre channel fabric, determining that a second switch connected to the first switch was dynamically configured, the second switch included in the fibre channel fabric,

wherein determining the second switch was dynamically configured is based at least in part on receiving a first message from the second switch;

isolating the first switch from the second switch upon determining that the second switch was dynamically configured.