Router apparatus and frame transfer method
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United States of America Patent
Stats
-
Dec 3, 2002
Grant Date -
N/A
app pub date -
Mar 15, 1999
filing date -
Mar 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A router has a function of providing a label used for transferring a datalink frame by a cut-through operation (i.e., datalink-layer switching). Whether the cut-through operation is to be performed or not is indicated by a cut-through declarator described in a prescribed portion (e.g., OUI field) within an upper-layer-protocol identifying information region (e.g., SNAP field) of a received frame or signaling message. The information described in the remaining portion (e.g., PID field) within the upper-layer-protocol identifying information region and the information described in the destination or source datalink-layer address region of the received frame or signaling message are used as the label for identifying in the datalink layer a packet flow to which a received frame belongs.
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