Methods, systems, and computer readable media for automatically selecting between internet protocol switching modes on a per-module basis in a packet forwarding device
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United States of America Patent
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Dec 11, 2012
Issued Date -
N/A
app pub date -
Jun 21, 2010
filing date -
Mar 15, 2010
priority date (Note) -
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Abstract
The subject mailer described herein includes methods, systems, and computer readable media for automatically selecting between Internet protocol switching modes on a per-module basis in a packet forwarding device. According to one aspect, a method may include determining capacities of hardware longest prefix matching (LPM) tables located on each input/output (I/O) module in a multi-module IP packet forward device. The number of routes currently stored in a software LPM table may be determined. If the software LPM table can be stored within the hardware LPM table for an I/O module, an LPM mode may be automatically selected for that I/O module. If the contents of software LPM table cannot be stored within the hardware LPM table for a particular I/O module, the I/O module may be automatically transitioned to operate in an Internet protocol forwarding database (IPFDB) mode.
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