Multiplex communications – Wide area network – Packet switching
Patent
1995-05-30
1996-07-09
Shah, Alpesh M.
Multiplex communications
Wide area network
Packet switching
395800, 370 943, 3642285, 3642419, 36424295, 364DIG1, G06F 1300
Patent
active
055353380
ABSTRACT:
DLL devices are built with multiple MAC address instead of a single MAC address, and provide a multiple virtual DLL interfaces to the upper layers (3-7) in a computer. This results in a new class of multi-function computers for attachment to a network system which take advantage of the multiple virtual DLL interfaces, to increase performance of the respective functions executed by the computer. Thus, a new network interface control apparatus and a new class of multi-function computer systems for attachments to networks are provided. The memory in the medium access control device stores a plurality of additional network addresses in addition to the assigned network addresses. The address filtering logic includes circuits responsive to the additional network addresses, such as logic for blocking a particular frame on at least one of the plurality of data channels when the source and destination address of a particular frame are found in the additional addresses stored in the memory. The plurality of data channels served by the media access control device may reside on a single physical interface, or in independent physical interfaces as suits the needs of a particular design. A high performance design would include independent buffering and queuing structures for each of the data channels. An alternative design may include shared buffering and queuing structures for a plurality of functional modules in the connected computer which have independent side network addresses.
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Hart John H.
Krause Jeffrey
Russell Steven P.
Seaman Michael J.
Strohl Niles E.
3Com Corporation
Shah Alpesh M.
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