Method and apparatus for adaptively determining the format of da

Details Method and apparatus for adaptively determining the format of da Method and apparatus for adaptively determining the format of da

1992-11-18

1997-12-09

Swann, Tod R.

Multiplex communications

Wide area network

Packet switching

39520011, 39520012, 39520004, 39520017, 395429, 395430, 395431, 395835, 395828, 370 79, 370 8513, 370465, 370466, 370254, 370467, 370469, 370908, G06F 1300

Patent

active

056968990

ABSTRACT:
Method and apparatus by which an interactive network board can determine which of plural frame packet types is currently being used for LAN communication on a local area network. A prescanning software module simultaneously binds itself through a link support layer to each of the plural frame packet types and then deactivates itself. The LAN communication network is then monitored for broadcast traffic so as to capture a LAN frame packet, whereupon the link support layer provides data groups for the captured frame packet, each of the data groups corresponding to a different one of the plural frame packet types. The prescanner is reactivated so as to prescan each data group for a predetermined IPX header, and determines the frame packet type in correspondence to the data group having the predetermined IPX header. The prescanner is operative in a multiprotocol network environment in which two different LAN operating systems having respectively different operating protocols, such as Novell-compatible and UNIX-compatible operating systems, both carry on LAN communication on a single network bus. In this case, the prescanner repeats operations for each of the different operating protocols.

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