Multiplex communications – Wide area network – Packet switching
Patent
1994-12-30
1996-07-23
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 852, 370 8513, 370 941, 380 9, H04L 900
Patent
active
055397379
ABSTRACT:
A secure repeater implementing data packet masking includes a programmable and selective, on a per port basis, multicast response. A multicast controller receives a multicast identifier extracted from a destination address field of a data packet. A plurality of memories, one associated with each port, determines the associated port's response to the multicast identifier. Each memory stores a multicast control code. When the multicast control code for a particular port has a value indicating that the associated port is enabled to receive multicast packets, assertion of the multicast identifier to the multicast controller for the particular port results in disabling the security masking for the port and subsequent transmission of unmodified data from the particular port.
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Crayford Ian
Lo William
Advanced Micro Devices , Inc.
Blum Russell W.
Olms Douglas W.
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