Title:
A METHOD AND SYSTEM FOR DECREASING ROUTING LATENCY FOR SWITCHING PLATFORMS WITH VARIABLE CONFIGURATION
Document Type and Number:
WIPO Patent Application WO2001086890
Kind Code:
A3
Abstract:
A method for decreasing routing latency of a switching platform comprises identifying ports which have changed their operational state and modifying the port polling code associated with the respective ports so that operational ports are polled for frames to be routed, while non-operational ports are not polled. In one embodiment, the method is implemented in a fibre channel switch. Non-operational ports are identified as having operational states below a pre-determined threshold level of functionality. The polling code for the ports is modified while polling operations are carried out in the switch. The code for a newly operational port is modified by copying into the code one or more instructions that poll the port for a frame and routes the frame. The code for a newly non-operational port is modified by copying into the code a branch instruction that bypasses the remainder of the polling code for the port. The frame routing latency of the switch is reduced because ports which are non-operational and will not produce frames are not polled.
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Inventors:
KING STEVE (US)
MAO CHIAYIN (US)
BUCHT THOMAS W (US)
MAO CHIAYIN (US)
BUCHT THOMAS W (US)
Application Number:
PCT/US2001/013357
Publication Date:
July 18, 2002
Filing Date:
April 25, 2001
Export Citation:
Assignee:
CROSSROADS SYS INC (US)
KING STEVE (US)
MAO CHIAYIN (US)
BUCHT THOMAS W (US)
KING STEVE (US)
MAO CHIAYIN (US)
BUCHT THOMAS W (US)
International Classes:
H04L12/56; (IPC1-7): H04L12/52; H04L12/44
Domestic Patent References:
| WO1999041862A1 | 1999-08-19 |
Foreign References:
| EP0869641A2 | 1998-10-07 |
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