• Datacenter Networks
• Goals of FECN
• FECN Overview
• FECN: Observations
• Switch Algorithm
• The Basic Switch Algorithm
• Enhancement 1: Queue-Control
• Queue Control Function: f(q)
• Enhancement 2: Exponential Averaging
• Enhancement 3: Limited Rate Increase
• Enhancement 4: Variable Capacity Adjustment
• Enhancement 5: Time Based Sampling
• General Simulation Parameters
• Baseline Simulation Results
• FECN with TCP flows
• Simulation Results
• Symmetric Topology: Configuration
• Symmetric Topology: Source Throughput
• Symmetric Topology: Queue Length
• Symmetric Topology: Link Utilization
• Simple Topology, 400us Delay
• Symmetric Topology LD: Source Throughput
• Symmetric Topology LD: Queue Length
• Sym. Topology LD: Link Utilization
• Large Topology: Configuration
• Large Topology: Source Rates
• Large Topology: Link Utilization
• Large Topology: Queue Length
• PAUSE
• Bursty Traffic: Configuration
• Large Topology - Bursty Traffic: Througput
• Large Topology - Bursty Traffic: Link Utilization
• Large Topology - Bursty Traffic: Queue
• Output Generated Hotspot Scenario
• OGHS – Uncongested Link (ST2 to CS)
• OGHS – Congested Link (CS to ST0)
• OGHS – 9 Congested Flows
• OGHS - Queue Length
• OGHS – Long Delay
• OGHS-LD: Uncongested Link - ST2 to CS
• OGHS-LD: Congested Link (CS to ST0)
• OGHS-LD: 9 Congested Flows
• OGHS-LD: Queue Length
• OGHS-LD: Other Observations
• Minimum Buffering Required w Pause
• Sensitivity Analysis
• N0=100
• N0=80
• N0=40
• N0=20
• Sensitivity to N0
• Overhead of FECN
• Advantages of FECN
• Summary

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