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 Title: |
US5764634:
Lan switch with zero latency
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Christensen, Kenneth J.; Tampa, FL
Noel, Francis E.; Durham, NC
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| Assignee: |
International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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| Published / Filed: |
1998-06-09
/ 1996-03-13
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| Application Number: |
US1996000614714
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| IPC Code: |
Advanced:
H04L 12/56;
Core:
more...
IPC-7:
H04J 3/26;
H04L 12/56;
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| ECLA Code: |
H04L12/56S8A;
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| U.S. Class: |
Current:
370/389;
370/401;
370/428;
Original:
370/389;
370/401;
370/428;
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| Field of Search: |
370/229,235,236,237,357,360,389,392,395,396,400,401,402,403,404,405,406,407,428,429,445,446,463
340/825.5,825.51,825.52
395/200.01,200.13,311,312,412,421.06,421.11,435
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| Priority Number: |
| 1996-03-13 |
US1996000614714 |
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| Abstract: |
A LAN switch includes port modules which receive frames from their respective LAN segments and forwards the frames simultaneously to all output ports and to a port look-up function which determines the output port to which the frames should be forwarded. If the port look-up function identifies the output port, frame transmission is halted at all ports except the identified port. By performing the forwarding function and port look-up function simultaneously, a zero latency switch is provided.
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| Attorney, Agent or Firm: |
Cockburn, Joscelyn G. ;
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| Primary / Asst. Examiners: |
Hsu, Alpus H.;
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 15 claims |
We claim:
1. In a LAN switch including a plurality of ports for coupling to LAN segments or single stations, a data bus, an address bus, and control bus and port cards for coupling the ports to respective ones of the buses, a method for transporting frames between the ports comprising the steps of:
- for each frame receive at a port from an external source, sending the frame to the data bus;
- placing on the address bus a global port number that identifies buffers to copy the frame on the data bus;
- analyzing the frame;
- determining a destination address; and
- replacing the global port number on the address bus with a unique port number that will route the frame to the destination address.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 25 U.S. patent(s) that reference this one
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