Table of Contents
Explicit Congestion Notification (ECN)
Overview
Data Center Traffic Management
Requirements for a Good Scheme
Convergence to Stability
Large Oscillations and Metastability
Simulation Results: BCN
Time to Convergence
Asymmetric Topology and Multiple Congestion Points
Multiple Congestion Points: BCN
Slow Convergence to Fairness
On/Off Sources
Fundamental Issues
Disclaimer
Explicit Congestion Notification (ECN)
Proposed Algorithm
A Simple Switch Algorithm
A Sample Switch Algorithm
Queueing Control Function: f(q)
Queue Control Function: f(q)
Analytical Results
Fairness Proof
Convergence Proof
Convergence Time
Source Algorithm
Congestion Notification Approaches
Simulation Parameters
Simulation Results
Symmetric Topology: Configuration
Symmetric Topology: Source Rates Rcvd
Symmetric Topology: Source Rates Rcvd
Symmetric Topology: Queue Length
Symmetric Topology: Link Utilization
Parking Lot Topology
Parking Lot: Source Rates for ECN
Parking Lot: Rates for BCN
Simulation with Asymmetric Topology
Simulation with Asymmetric Topology
Results for Baseline BCN
Asymmetric Topology: Queue Lengths
Bursty Traffic: Configuration
Bursty Traffic: Throughputs
Bursty Traffic: Link Utilization
Bursty Traffic: Queue Lengths
Variations of ECN
Choices for Congestion Notification
RLT Tag Marking Algorithm
Symmetric Topology: 2-Way Traffic
Symmetric Topology: RLT Tag Method
FECN
Advantages of ECN
Pause and Queue Control Fn
CN vs Non-CN Regions
Adaptive Measurement Interval
Summary |