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Check Point QoS Overview
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CHECK POINT QOS OVERVIEW
Check Point QoS is a bandwidth-management solution used to alleviate
bandwidth congestion at network-access points. Check Point QoS controls both
inbound and outbound traffic flows. Check Point QoS uses four technologies to
control traffic:
• Stateful Inspection
• Intelligent Queuing Engine (IQ Engine)
• Weighted Flow Random Early Drop (WFRED)
• Retransmission Detection Early Drop (RDED)
STATEFUL INSPECTION
Check Point QoS uses Check Point’s patented Stateful Inspection technology to
derive complete state and context information for all network traffic.
INTELLIGENT QUEUING ENGINE (IQ ENGINE)
Check Point QoS’s IQ Engine uses state-derived information to classify traffic
and place it in the proper transmission queue. Check Point QoS uses a packet
scheduler to move packets through a dynamically changing scheduling tree at
different rates, in accordance with the QoS Policy.
WEIGHTED FLOW RANDOM EARLY DROP (WFRED)
Weighted Flow Random Early Drop (WFRED) is a mechanism for managing
packet buffers, by selectively dropping packets during periods of network
congestion. WFRED is transparent to users and requires no configuration.
RETRANSMISSION DETECTION EARLY DROP (RDED)
Retransmission Detection Early Drop (RDED) is a mechanism for reducing
the number of retransmits and retransmit storms during periods of network
congestion. RDED prevents inefficiencies by detecting retransmits in TCP
streams and preventing the transmission of redundant packets when multiple
copies of a packet are concurrently queued on the same flow.
