Fibre channel credit extender and repeater

Details Fibre channel credit extender and repeater Fibre channel credit extender and repeater

2002-06-10

2008-10-28

Backer, Firmin (Department: 2616)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

C370S235000

Reexamination Certificate

active

07443794

ABSTRACT:
The Fiber Channel Credit Extender (FCCE) (600) is a network device that is disposed between and connected to an end node (210) and an optical repeater (220). The FCCE (600) contains as many buffer credits as necessary, to solve bandwidth problems in a network. In a situation where maximum bandwidth is required in both directions of a link, the FCCE (600) breaks a single logical link into three physically separated “linklets.” The short-distance linklets attain maximum bandwidth by use of the existing buffer credits of the end nodes. The long-distance linklet attains maximum bandwidth by use of very high receive buffer credits in the FCCEs (600). In this way, only those links that need maximum bandwidth over distances not covered by end-node credit counts need be attached to an FCCE (600). The FCCE (600) contains the optical repeater to gain distance on that link, and contains high credit count receive buffers to gain bandwidth on the link. All other ports of the switch can have smaller and less expensive receive buffers.

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