Automatic detection of a similar device at the other end of a wire in a computer network
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 6, 1999
Grant Date -
N/A
app pub date -
Jan 6, 1997
filing date -
Jan 6, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Automatic detection by a port of the type of device connected by a cable to the port is accomplished by transmitting a control packet by the device, where the control packet has a nonstandard format. The port examines received packets for the nonstandard format. Upon detection of a packet having the nonstandard format, the port recognizes that the source device of the packet is of a predetermined type which transmits control packets of the nonstandard format. Further, by choosing the nonstandard format so that typical forwarding devices will not forward the nonstandard packet, the port is assured that the source device is attached to the port by a cable. That is, by choosing a nonstandard packet which is not forwarded by a bridge or router, the port is assured that the packet has not been forwarded from a remote part of the network.
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