Address filter for a transparent bridge interconnecting local ar

Details Address filter for a transparent bridge interconnecting local ar Address filter for a transparent bridge interconnecting local ar

1992-05-11

1994-08-30

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 97, H04L 1246

Patent

active

053434714

ABSTRACT:
An address filter for a transparent bridge interconnecting two local area networks (LANs) is disclosed. The address filter is capable of determining from an address contained in a frame issued on one network if it should be transferred to a second network. The address is verified by determining a most likely address from a search tree. The search tree has a path which is defined by pairs of address bits. At the end of each path within the search tree defined by the address bit pairs is a term node. The term node identifies a location within a compare table which contains the most likely address matching the frame address. The two addresses are compared to make a copy decision. Node addresses which are added to a network can be learned by the filter. The search tree and compare table are reconfigurable by a host processor to accommodate learned addresses.

REFERENCES:
patent: 4737953 (1988-04-01), Koch et al.
patent: 4754420 (1988-06-01), Jensen
patent: 4922503 (1990-05-01), Leone
patent: 5136580 (1992-08-01), Videlock et al.
patent: 5151897 (1992-09-01), Suzuki
"Putting Routing Tables in Silicon" by Tong-Bi Pei and Charles Zukowski, IEEE Network Magazine, Jan. 1992 pp. 42-50.
Wilnai and Amitai, Electronic Design, Apr. 26, 1990, pp. 75-78, 80, 88 and 90.

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