Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2011-07-12
2011-07-12
Ton, Dang T (Department: 2475)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S466000
Reexamination Certificate
active
07978695
ABSTRACT:
Hardware-enforced zoning is provided in Fiber Channel switches to protect against breaching of assigned zones in a switch network which can occur with software-based zoning techniques. The invention provides logic for performing a hardware-based validation of the Source ID S_ID of frames both at the point where the frame enters the Fiber Channel fabric, and at the point where the frame leaves the fabric. The S_ID is verified against an inclusion list or table of allowable S_IDs, which can be unique for each fabric port. The invention provides a way to increase the range of sources an inclusion table can express, by implementing wild cards, on an entry-by entry basis. If the S_ID is valid, it will enter the fabric and route normally. If invalid, the frame will not be routed but will be disposed of by the fabric according to FC rules. This prevents incorrect S_IDs from breaching the table-driven zoning at the point where frames exit the fabric, to prevent unauthorized access to devices connected to the switch network.
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Dropps Frank R.
George William R.
QLogic Switch Products, Inc.
Schwegman Lundberg & Woessner, P.A.
Ton Dang T
Zhao Wei
LandOfFree
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