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Cflowd Filter Matching
In the filter-matching process, normally, every packet is matched against filter (access list) criteria
to determine acceptability. With cflowd, only the first packet of a flow is checked. If the first
packet is forwarded, an entry is added to the cflowd cache. Subsequent packets in the same flow
are then forwarded without needing to be matched against the complete set of filters. Specific
performance varies depending on the number and complexity of the filters.
7450 ESS OS Router Configuration Guide
Cflowd
Page 529
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