Disposition filtering of messages using a single address and protocol table bridge

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United States of America Patent

PATENT NO 5515513
SERIAL NO

08410546

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An arrangement for selective filtering, e.g. one-way filtering, of messages received by a 2-port bridge from stations connected to two LANs of an extended LAN is provided. The bridge includes a message filtering database containing the addresses of all stations connected to one of the LANs. The database also contains a list of higher-level protocols employed by the stations. Associated with each protocol-type is information used by the bridge to dispose of the message. The message filtering database comprises a single table memory capable of supporting both ports of the bridge. The selective filtering process involves a two-step analysis by the bridge to determine whether to discard the message or forward it to another port. The analysis is based on a destination address and a protocol-type of the received message.

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Patent Owner(s)

  • ENTERASYS NETWORKS, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gili, Pat Westfield, MA 1 51
Lomicka, Jeffrey A Maynard, MA 2 52
Metzger, Stephen D Lancaster, MA 4 80
Vacon, Gary Melrose, MA 58 726

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