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WO1998036537B1 - Fibre channel switching fabric - Google Patents

Fibre channel switching fabric

Info

Publication number
WO1998036537B1
WO1998036537B1 PCT/US1998/002048 US9802048W WO9836537B1 WO 1998036537 B1 WO1998036537 B1 WO 1998036537B1 US 9802048 W US9802048 W US 9802048W WO 9836537 B1 WO9836537 B1 WO 9836537B1
Authority
WO
WIPO (PCT)
Prior art keywords
port control
fibre channel
attached devices
channel switching
switching fabric
Prior art date
Application number
PCT/US1998/002048
Other languages
French (fr)
Other versions
WO1998036537A1 (en
Filing date
Publication date
Priority claimed from US08/801,471 external-priority patent/US6185203B1/en
Application filed filed Critical
Priority to EP19980907361 priority Critical patent/EP0983666A1/en
Priority to CA 2281609 priority patent/CA2281609A1/en
Publication of WO1998036537A1 publication Critical patent/WO1998036537A1/en
Publication of WO1998036537B1 publication Critical patent/WO1998036537B1/en

Links

Abstract

The Fibre Channel standard was created by the American National Standard for Information Systems (ANSI) X3T11 task group to define a serial I/O channel for interconnecting a number of heterogeneous peripheral devices to computer systems as well as interconnecting the computer systems themselves through optical fibre and copper media at gigabit speeds (i.e., one billion bits per second). Multiple protocols such as SCSI (Small Computer Serial Interface), IP (Internet Protocol), HIPPI, ATM (Asynchronous Transfer Mode) among others can concurrently utilize the same media when mapped over Fibre Channel. A Fibre Channel Fabric is an entity which transmits Fibre Channel frames between connected Node Ports. The Fibre Channel fabric routes the frames based on the destination address as well as other information embedded in the Fibre Channel frame header. Node Ports are attached to the Fibre Channel Fabric through links.

Claims

AMENDED CLAIMS
[received by the International Bureau on 18 September 1998 (18.09.98); original claims 1 and 56 amended; new claims 66 and 67 added; remaining claims unchanged (3 pages)]
1. A fibre channel switching fabric for connecting multiple attached devices comprising: multiple port control modules, the port control modules being adapted for communication with the attached devices, the port control module functioning to build a route request and read a route response, a hardware router module, the router module being connected to the port control modules by a route request connection and by a separate route response connection, and a switch core, the switch core being connected to the port control modules.
2. The fibre channel switching fabric of claim 1 for connecting multiple attached devices further including a fabric control module connected to the router module a d port control modules.
3. The fibre channel switching fabric of claim 1 for connecting multiple attached devices wherein there is one port control module for each attached device.
4. The fibre channel switching fabric of claim 1 for connecting multiple attached devices wherein at least one port control module is attached to a arbitrated loop having multiple attached devices.
5. The fibre channel switching fabric of claim 1 for connecting multiple attached devices wherein the port control module further serves to modify frames.
6. The fibre channel switching fabric of claim 1 for connecting multiple attached devices wherein the port control module modifies frames to fabric frame busy (FJBSY).
55. The method of claim 54 for control of an input buffer wherein the tag bits are set to a unique condition.
56. A fibre channel switching fabric for connecting multiple attached devices, comprising: multiple port control modules, the modules being adapted for communication over links to the attached devices, a hardware router connected to the port control modules, the router including: a port control route request state machine, a port control route response state machine, and a route determination module, the port control route request state machine, the route determination module and the port control route response state machine connected in a serial manner for pipeline operation, and a switch connected to the port control modules and the router.
57. The fibre channel switching fabric of claim 56 for connecting multiple attached devices further including a fabric control system connected to the port control modules and router.
58. The fibre channel switching fabric of claim 56 for connecting multiple attached devices further including a router control state machine.
59. The fibre channel switching fabric of claim 56 for connecting multiple attached devices wherein the port control route request state machine includes a round- robin arbitration selection unit which is connected to the port control modules.
60. The fibre channel switching fabric of claim 59 for connecting multiple attached devices wherein each port control module is separately connected to the round- robin arbitration selection unit.
65. The method for handling blocked route requests in a communication system of claim 64 wherein the priority information is from the group comprising: Class 1, Class 2 and Class 3 service,
66. The fibre channel switching fabric of claim 56 for connecting multiple attached devices wherein the route determination module is implemented in hardware,
67. A fibre channel switching fabric for connecting multiple attached devices comprising: multiple port control modules, the port control modules being adapted for communication with the attached devices, the port control module functioning to build a route request and read a route response, a router module, the router module being connected to the port control modules by a route request connection and by a separate route response
connection, and a single switch core supporting each of Class 1, Class 2 and Class 3 service, the switch core being connected to the port control modules.
PCT/US1998/002048 1997-02-18 1998-02-04 Fibre channel switching fabric WO1998036537A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19980907361 EP0983666A1 (en) 1997-02-18 1998-02-04 Fibre channel switching fabric
CA 2281609 CA2281609A1 (en) 1997-02-18 1998-02-04 Fibre channel switching fabric

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/801,471 US6185203B1 (en) 1997-02-18 1997-02-18 Fibre channel switching fabric
US08/801,471 1997-02-18

Publications (2)

Publication Number Publication Date
WO1998036537A1 WO1998036537A1 (en) 1998-08-20
WO1998036537B1 true WO1998036537B1 (en) 1998-12-23

Family

ID=25181186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/002048 WO1998036537A1 (en) 1997-02-18 1998-02-04 Fibre channel switching fabric

Country Status (4)

Country Link
US (15) US6185203B1 (en)
EP (1) EP0983666A1 (en)
CA (1) CA2281609A1 (en)
WO (1) WO1998036537A1 (en)

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